Service Information: Textron Lycoming

Alternative Names: (Avco Lycoming, Lycoming Engines)

There will be over 135,000 documents in our Service Information Indexes. If the SB that you need is not yet a link (or is not listed), Contact Us. Please mention the AD No. in your message.

Most SBs are displayed in PDF format. (Use your Browser's 'Edit | Find' function to locate an SB by number.)

Illustrated Parts Catalogs • Installation & Operation Manuals • Maintenance Manuals • Miscellaneous • Operator's Manuals • Overhaul Manuals • Publication Indexes • Service Bulletins • Service Instructions • Service Letters • Special Advisories • User Manuals

Illustrated Parts Catalogs
Name	Revision	Lang	Subject	Date
IPC 102-1	B	en	O-290-D Series	4/30/1991
IPC 103		en	O-320, IO-320 and LIO-320 Series	1/31/1976
IPC 106		en	0, 10, HO, H10-360
IPC 107		en	VO-360 Series and IVO-360-A1A Helicopter
IPC 110		en	VO-435 and TVO-435 Series	9/30/1972
IPC 111		en	GO-480-B, -D and F6 Series
IPC 114	2	en	GSO-480 and IGSO-480 Series	9/30/1980
IPC 115-1	A	en	O-540-A Series Standard Cylinder Flange Crankcase	9/30/1991
IPC 115-2		en	O-540-B, -E & -G Series	7/31/2009
IPC 118		en	VO-54D-Series and TIVO-54D-A2A Helicopter	10/31/1973
IPC 119		en	IO-720-D1C Wide Cylinder Flange	10/31/1977
IPC 119	1	en	IO-720-D1C Wide Cylinder Flange
IPC 120	1	en	TIO-541 Series	12/31/1981
IPC 121		en	TIGO-541 Series	10/31/1975
IPC 122-H		en	O-320-H 76 Series	12/31/2012
IPC 123		en	76 Series & O-360, LO-360 Series
IPC 124	1	en	TO, LTO-360 76 Series	4/30/1985
IPC 203-1		en	O-320-A2B, -A3B Series	7/31/2011
IPC 203-2		en	O-320-A2C, -A2D Series	8/31/2011
IPC 203-3		en	O-320-E1A, -E2A Series	10/31/2011
IPC 203-5		en	O-320-E2B, -E2C Series	11/30/2011
IPC 203-6		en	O-320-E2D, -E3D Series	9/30/2011
IPC 203-7		en	O-320-E2G Series	11/30/2011
IPC 203-8		en	O-320-E2H, -E3H Series	11/30/2011
IPC 203-9	A	en	O-320-B and D Series High Compression, Wide Cylinder Flange	11/30/1985
IPC 203-D3G		en	O-320-D3G Series	7/31/2012
IPC 215-1	A	en	IO-540-A, B, C, D, E and G Series Standard Cylinder Flange Crankcase	7/31/2010
IPC 215-2		en	IO-540-J, K, M, N, P and R Series Standard Cylinder Flange Crankcase	5/31/1993
IPC 302	B	en	O-235 Series	12/31/1986
IPC 302-1		en	O-235-P2A
IPC 302-L2A, -L2C		en	O-235-L2A, -L2C Series	11/30/2012
IPC 306-1	B	en	O-360-A Wide Cylinder Flange	6/30/1980
IPC 306-1	B reprint	en	O-360-A Wide Cylinder Flange	8/1/1991
IPC 306-2	B	en	O, LO, TO, -360 Series Wide Cylinder Flange	5/31/2010
IPC 306-3		en	O-360-A4N Series	4/30/2011
IPC 306-4		en	O-360-C1G Series	3/31/2011
IPC 306-5		en	(L)O-360-A1H6 Series	5/31/2011
IPC 306-6		en	O-360-A1P Series	5/31/2011
IPC 306-7		en	O-360-B2C Series	7/31/2011
IPC 306-8		en	O-360-C4F and -C4P Wide Cylinder Flange Crankcase
IPC 306-9		en	O-360-A4P Wide Cylinder Flange Crankcase
IPC 306-10		en	HO-360-C1A Wide Cylinder Flange Crankcase
IPC 306-11	A	en	O-360-J2A Wide Cylinder Flange Crankcase	8/31/1998
IPC 306-13		en	IO-360-B1G6 Wide Cylinder Flange Crankcase
IPC 306-16		en	IO360M1B Series	12/31/2010
IPC 306-17		en	IVO-360-A1A Series Wide Cylinder Flange Crankcase	7/31/2010
IPC 306-A4M		en	O-360-A4M Series	10/31/2012
IPC 315-1	B	en	TIO/LTIO-540-U2A Series Wide Cylinder Flange	12/31/2008
IPC 315-2	A	en	TIO/LTIO-540-V2AD Wide Cylinder Flange	6/30/1986
IPC 315-3		en	TIO-540-AB1AD Wide Cylinder Flange	4/30/1985
IPC 315-4	2nd Ed	en	TIO-540-AA1AD Wide Cylinder Flange Crankcase	12/31/2010
IPC 315-5	E	en	TIO-LTIO-540 Series Wide Cylinder Flange Crankcase	8/31/2010
IPC 315-7	2	en	TIO-540-AE2A	11/30/2013
IPC 315-8	A	en	TIO-540-AF1A, -AF1B Wide Cylinder Flange Crankcase	1/31/1995
IPC 315-9		en	TIO-540 AG1A Wide Cylinder Flange Crankcase
IPC 315-10		en	TIO-540-AH1A Series	5/31/2011
IPC 315-11	A	en	TIO-540 W2A Wide Cylinder Flange Crankcase	12/31/2009
IPC 315-13	A	en	TIO-540 AK1A	11/30/2002
IPC 406-1		en	IO, AIO-360-A, -B Series Wide Cylinder Flange	1/31/1995
IPC 406-2	E	en	IO/LIO-360-C, -J, HIO, TIO, AEIO-360 Series Wide Cylinder Flange	2/28/2009
IPC 406-3	C	en	TIO-360-C1A6D Wide Cylinder Flange	12/31/2009
IPC 406-4		en	AEIO-360-BB -B1F & -B1H	11/30/2005
IPC 406-5		en	AEIO-360-H1B	8/31/2003
IPC 406-6		en	HIO-360-G1A	1/31/2003
IPC 406-L2A		en	IO360L2A Series	3/31/2012
IPC 409-2		en	YIO-390-B Series	10/31/2009
IPC 515-2		en	O-540-F1B5 Wide Cylinder Flange Crankcase	9/30/2009
IPC 515-3		en	O-540-A4D5	1/31/2003
IPC 515-4		en	O-540-H2A5	10/31/2005
IPC 515A4E5		en	O540A4E5 Series	3/31/2012
IPC 615		en	IO-540 Wide Cylinder Flange	12/31/1991
IPC 615-1		en	IO-540-C4D5D Wide Cylinder Flange	6/30/1982
IPC 615-3		en	IO-540-V Series	2/28/2011
IPC 615-4		en	IO-540-W Series Wide Cylinder Flange Crankcase	9/30/1993
IPC 615-7		en	AEIO-540-L1B5D Wide Cylinder Flange
IPC 615-8		en	IO-540-T Series (-T4A5D, -T4B5, T4B5D, T4C5D) Series Wide Cylinder Flange Crankcase	9/30/1992
IPC 615-11		en	AEIO-540-D Series (-D4A5, -D4B5) Wide Cylinder Flange Crankcase	8/31/2001
IPC 615-12		en	IO-540-AC1A5 Wide Series Flange Crankcase	10/31/2008
IPC 615-14	B	en	I0-540-AF1A5	12/31/2009
IPC 615-AE1A5		en	IO-540-AE1A5 Series	7/31/2013
IPC 615-AG1A5		en	IO-540-AG1A5 Series	11/30/2012
IPC 615-K1A5		en	IO-540-K1A5 Series	1/31/2015
IPC 701-1		en	IO-580-B1A	2/28/2003
IPC 800-1	1	en	YTEO-540-B1A	7/11/2014
IPC AEIO-360-B1F		en	AEIO-360-B1F	6/1/2025
IPC AEIO-390-A		en	AEIO-390-A Series	7/31/2016
IPC AEIO-390-A	1	en	AEIO-390-A Series	6/1/2026
IPC IO-360-C1G6		en	IO-360-C1G6	6/30/2016
IPC IO-360-L2A		en	IO-360-L2A	6/1/2025
IPC IO-360-N1A		en	IO-360-N1A	1/31/2016
IPC IO-360-P1A		en	IO-360-P1A	6/30/2017
IPC IO-390-A		en	IO-390-A Series	6/30/2016
IPC IO-390-A	1	en	IO-390-A Series	6/1/2025
IPC IO-390-C		en	IO-390-C Series	2/1/2017
IPC IO-390-C	1	en	IO-390-C Series	6/1/2025
IPC IO-390-D		en	IO-390-D Series	3/31/2020
IPC IO-390-D	1	en	IO-390-D Series	6/1/2025
IPC IO-540-AB1A5		en	IO-540-AB1A5	12/31/2015
IPC IO-540-D4B5		en	IO-540-D4B5 Series	3/31/2015
IPC LIO-360-B1G6		en	LIO-360-B1G6	6/30/2017
IPC LIO-360-M1A		en	(L)IO-360-M1A	1/31/2016
IPC LTO-360-E1A6D		en	(L)TO-360-E1A6D	6/1/2025
IPC O-320-B1A		en	O-320-B1A	4/30/2016
IPC O-320-D2J		en	O-320-D2J	10/21/2016
IPC TEO-540-C1A		en	TEO-540-C1A	12/31/2018
IPC TEO-540-C1A	1	en	TEO-540-C1A	4/30/2019
IPC TEO-540-C1A	2	en	TEO-540-C1A	5/31/2021
IPC TEO-540-C1A	3	en	TEO-540-C1A	7/31/2021
IPC TEO-540-C1A	4	en	TEO-540-C1A	10/31/2021
IPC TEO-540-C1A	5	en	TEO-540-C1A	7/31/2023
IPC TEO-540-C1A	6	en	TEO-540-C1A	12/31/2024
IPC TIO-360-C1A6D		en	TIO-360-C1A6D	6/1/2025
IPC TIO-540-AJ1A		en	TIO-540-AJ1A	4/30/2016
IPC TIO-540-AK1A		en	TIO-540-AK1A	6/1/2025
IPC YO-233-B2A		en	YO-233-B2A	2/29/2016
IPC YTEO-540-B1A		en	YTEO-540-B1A (Lancair)	3/31/2016

Installation & Operation Manuals
Name	Revision	Lang	Subject	Date
IOM 60297-28		en	IO-580-B1A	3/31/2003
IOM 60297-32		en	AEIO-580-B1A	5/31/2007
IOM 60297-33		en	IO-540-AF1A5	1/31/2008
IOM 60297-34	1	en	IO390A Series	5/31/2009
IOM 60297-36		en	(L)IO-360-M1A	6/30/2008
IOM 60297-37		en	YIO-390-B Series	10/31/2009
IOM 60297-40	B	en	YO-233-B2A Series	10/31/2014
IOM 60297-41		en	YTEO-540-B1A Non-Certified Series	9/30/2012
IOM 60297-42		en	AEIO-390-A Series	3/31/2012
IOM 60297-43		en	O-540-A4E5 Series	5/31/2012
IOM 60297-45		en	IO-540-AG1A5 Series	10/31/2012
IOM HIO-390-A1A		en	HIO-390-A1A	9/30/2017
IOM IO-360-N1A		en	IO-360-N1A	1/31/2016
IOM IO-360-P1A		en	IO-360-P1A	1/31/2017
IOM IO-390-C		en	IO-390-C Series	12/31/2016
IOM IO-390-D		en	IO-390-D Series	2/29/2020
IOM LIO-360-B1G6		en	LIO-360-B1G6	8/31/2017
IOM TEO-540-C1A		en	TEO-540-C1A	10/31/2018
IOM TEO-540-C1A	1	en	TEO-540-C1A	3/31/2019
IOM TEO-540-C1A	2	en	TEO-540-C1A	4/30/2021
IOM TEO-540-C1A	3	en	TEO-540-C1A	6/30/2021
IOM TEO-540-C1A	4	en	TEO-540-C1A	10/31/2021
IOM YTEO-540-B1A		en	YTEO-540-B1A (Lancair)	3/31/2016

Maintenance Manuals
Name	Revision	Lang	Subject	Date
MM HIO-390-A1A		en	HIO-390-A1A	9/30/2017
MM IO-360-N1A		en	IO-360-N1A	1/31/2016
MM IO-360-P1A		en	IO-360-P1A	1/31/2017
MM IO-390-C		en	IO-390-C Series	12/31/2016
MM IO-390-D		en	IO-390-D Series	2/29/2020
MM LIO-360-B1G6		en	LIO-360-B1G6	8/31/2017
MM LM-IO-540-AG1A5		en	IO-540-AG1A5 Series	10/31/2012
MM LM-O-540		en	O-540-A4E5 Series	5/31/2012
MM LM-YO-233		en	YO233B2A Series	5/31/2012
MM LM-YTEO-540		en	YTEO-540-B1A Non-Certified Series	11/30/2012
MM TEO-540-C1A		en	TEO-540-C1A	10/31/2018
MM TEO-540-C1A	1	en	TEO-540-C1A	3/31/2019
MM TEO-540-C1A	2	en	TEO-540-C1A	4/30/2021
MM TEO-540-C1A	3	en	TEO-540-C1A	6/30/2021
MM TEO-540-C1A	4	en	TEO-540-C1A	10/31/2021
MM YO-233-B2A		en	YO-233-B2A	1/31/2021
MM YTEO-540-B1A		en	YTEO-540-B1A (Lancair)	3/31/2016

Operator's Manuals
Name	Revision	Lang	Subject	Date
OM 60297-3, 2nd Ed		en	O-340 Series	5/31/1975
OM 60297-8, 3rd Ed	1	en	VO-435 & TVO-435 Series	4/30/1999
OM 60297-9, 4th Ed		en	O-235 and O-290 Series	12/31/1987
OM 60297-9, 5th Ed	1	en	O-235 and O-290 Series	12/31/2006
OM 60297-10, 4th Ed	3	en	O-540, IO-540 Series	2/28/2009
OM 60297-11, 2nd Ed		en	VO-360 & IVO-360 Helicopter	11/30/1999
OM 60297-12, 6th Ed	7	en	O-360, HO-360, IO-360, AIO-360, HIO-360 & TIO-360 Series	3/31/1989
OM 60297-12, 8th Ed	5	en	O-360, HO-360, IO-360, AIO-360, HIO-360 & TIO-360 Series	11/30/2009
OM 60297-13, 3rd Ed		en	TIO-541 Series	11/30/2007
OM 60297-14, 3rd Ed		en	GO-480, IGO-480, GSO-480 and IGSO-480 Series	6/30/2008
OM 60297-15, 3rd Ed		en	IGO-540, IGSO-540 Series	12/31/2007
OM 60297-16, 2nd Ed	4	en	O-320, IO-320, AIO-320, LIO-320 Series	2/28/1973
OM 60297-17, 2nd Ed		en	VO-540, IVO-540, TIVO-540 Series	4/30/2008
OM 60297-19, 4th Ed		en	IO-720 Series	9/30/2006
OM 60297-20, 1st Ed	1	en	TO-360 Series	7/31/1977
OM 60297-20, 1st Ed	3	en	TO-360 Series	4/30/1997
OM 60297-20, 2nd Ed		en	TO-360 Series	12/31/2007
OM 60297-21, 2nd Ed	1	en	AEIO-320, AEIO-360, AEIO-540 Series	5/31/2007
OM 60297-22, 1st Ed		en	O-320 76 Series	4/30/1976
OM 60297-22, 2nd Ed	1	en	O-320 76 Series	8/31/2008
OM 60297-23A, 4th Ed	3	en	TIO-540 Series Angle Valve Cylinder Heads	12/31/2012
OM 60297-23P, 4th Ed	2	en	TIO-540 Series Parallel Valve Cylinder Heads	9/30/2006
OM 60297-25, 1st Ed	1	en	O-360 76 Series	4/30/1978
OM 60297-25, 2nd Ed	1	en	O-360 76 Series	7/31/2008
OM 60297-26, 1st Ed		en	TO-360 76 Series	9/30/1980
OM 60297-26, 2nd Ed		en	TO-360 76 Series	6/30/2007
OM 60297-27, 2nd Ed		en	TIO-540-AE2A Series	10/31/2006
OM 60297-30, 3rd Ed		en	O-320 Series	10/1/2006
OM 60297-30, 3rd Ed	revised	en	O-320 Series	1/1/2007
OM 60297-31, 3rd Ed		en	IO-320 Series	12/31/2006
OM SSP-1570		en	TIGO-541-E1A	10/31/1988

Overhaul Manuals
Name	Revision	Lang	Subject	Date
OM 60294-7	10	en	Direct Drive	11/30/1974
OM 60298-1, 2nd Ed		en	O-290-D2 Series	9/1/1954

Publication Indexes
Name	Revision	Lang	Subject	Date
SSP-112	10	en	Service Bulletins Letters and Instructions Index	4/30/2020
SSP-112	11	en	Service Bulletins Letters and Instructions Index	11/30/2020
SSP-112	12	en	Service Bulletins Letters and Instructions Index	9/30/2021
SSP-112	13	en	Service Bulletins Letters and Instructions Index	1/31/2022
SSP-112	14	en	Service Bulletins Letters and Instructions Index	11/30/2023
SSP-112	2	en	Service Bulletins Letters and Instructions Index	8/31/2015
SSP-112	3	en	Service Bulletins Letters and Instructions Index	7/31/2017
SSP-112	4	en	Service Bulletins Letters and Instructions Index	12/31/2017
SSP-112	5	en	Service Bulletins Letters and Instructions Index	3/31/2018
SSP-112	6	en	Service Bulletins Letters and Instructions Index	6/30/2018
SSP-112	7	en	Service Bulletins Letters and Instructions Index	9/30/2018
SSP-112	8	en	Service Bulletins Letters and Instructions Index	12/31/2018
SSP-112	9	en	Service Bulletins Letters and Instructions Index	7/31/2019
SSP-297		en	Service Bulletin Index	4/30/1997
SSP-303		en	Service Bulletins, Letters and Instructions	7/31/2003

Service Bulletins
Name	Revision	Lang	Subject	Date
SB 0002	2	en	Rotating Component Service-Life Limit	3/6/1989
SB 0022	1	en	Mandatory Inspection/Modification of Overspeed Pickup Housing Assembly	3/1/1971
SB 0028	3	en	Replacement of Second Stage Gas Producer Cylinder Bolts MS9060-08 or MS9705-08 with New Bolts 1-110-262-01	4/15/1977
SB 0031		en	Replacement/Modification of Torquemeter Pressure Boost Pump 1-300-221-01/02 with/to 1-300-221-03/04	1/1/1975
SB 0033		en	Mandatory Introduction of Improved Compressor Rotor Assembly	9/25/1973
SB 0037		en	Conversion of Model T5313A Engines to Model T5313B Configuration	12/1/1973
SB 0042		en	Introduction of Improved Centrifugal Compressor Impeller	11/15/1974
SB 0048	2	en	Modification of All Fuel Regulators	11/30/1979
SB 0052		en	Special Inspection - Centrifugal Compressor Impeller 1-100-078-07 and -08	11/26/1985
SB 101C-72-00-0131		en	Engine - Avoidance of Certain Power Turbine Speeds	9/17/1990
SB 145	B	en	Obsolescence of Early Type Exhaust Valve Seats	1/13/1958
SB 169		en	Prevention of Detonation	12/15/1953
SB 174		en	Lockwiring of Surge Chamber and Sediment Bowl Capscrew on Diaphragm Fuel Pumps	9/1/1954
SB 176		en	Replacement of Accessory Drive Adapter Gasket	12/10/1954
SB 183	A	en	Mandatory Magneto Timing Discrepancies	5/6/1957
SB 201	E	en	Mandatory Inspection of Crankshaft Flange	4/23/1993
SB 201	F	en	Mandatory Inspection of Crankshaft Flange	3/26/2013
SB 210		en	Method of Correcting Fuel Dye Strains at Stud Locations in Supercharger Housing	9/10/1956
SB 225	B	en	Mandatory Replacement of Valve Rocker Thrust Washers	3/16/1992
SB 240	E	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	6/14/1968
SB 240	N	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	11/20/1995
SB 240	P	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	5/4/1998
SB 240	R	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	11/10/1999
SB 240	S	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	2/5/2003
SB 240	T	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	5/25/2006
SB 240	U	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	5/8/2009
SB 240	V	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	7/22/2010
SB 240	W	en	Mandatory Parts Replacement at Overhaul and During Repair or Maintenance	2/23/2012
SB 249	A	en	Replacement of Cast Counterweights with Forged Counterweights	5/20/1960
SB 253	A	en	Replacement of Propeller Flange Bushings	4/24/1959
SB 254	A	en	Replacement of Intercylinder Baffle Assembly	4/10/1959
SB 290		en	Propeller Leakdown Inspection. Replacement of Propeller Shaft OU Seal Rings and Sleeve	9/7/1962
SB 290	Supp 1	en	Propeller Leakdown Inspection. Replacement of Propeller Shaft OU Seal Rings and Sleeve	10/5/1962
SB 293	B	en	PART I: Inspection of Exhaust Valve Guides PART II: Installation of New Camshafts	5/26/1967
SB 295		en	Inspection and Replacement of Oil Pump Drive Shaft	7/12/1963
SB 297		en	Mandatory One-Piece Main and Primary Venturi for Marvel-Schebler MA-4-5 Carburetor	12/6/1963
SB 297	A	en	Mandatory One-Piece Main and Primary Venturi for Marvel-Schebler MA-4-5 Carburetor	7/3/1970
SB 298		en	Fuel and Oil Vent Restriction Requirement for AC Lightweight Diaphragm Fuel Pumps	4/20/1964
SB 300	A	en	Mandatory Crankshaft Propeller Flange Inspection	11/2/1964
SB 300	B	en	Mandatory Crankshaft Propeller Flange Inspection	10/6/1967
SB 301	B	en	Mandatory Maintenance Procedures and Service Limitations for Valves	2/18/1977
SB 302		en	Replacement of Connecting Rod Assemblies, P/N 74308 and 74503 in IO-360-A1A Engines	8/13/1965
SB 302	A	en	Replacement of Connecting Rod Assemblies, P/N 74308 and 74503 in IO-360-A1A Engines	10/25/1968
SB 303	B	en	Heavy Connecting Rods for High Speed Helicopter Engines	5/26/1972
SB 303	C	en	Heavy Connecting Rods for High Speed Helicopter Engines	8/11/1972
SB 303	D	en	Heavy Connecting Rods for High Speed Helicopter Engines	11/3/1972
SB 303	E	en	Heavy Connecting Rods for High Speed Helicopter Engines	8/10/1973
SB 303	F	en	Heavy Connecting Rods for High Speed Helicopter Engines	9/28/1973
SB 305	B	en	Bendix RS Fuel Injection Bulletin No. 18, Revision 4	9/30/1966
SB 307		en	Replacement of AC Oil Filter Adapter Gasket	3/4/1966
SB 308		en	Replacement of Crankshaft Idler Gear Shafts	3/1/1966
SB 308	B	en	Replacement of Crankshaft Idler Gear Shafts	5/26/1967
SB 314	A	en	Limited Travel Valve Lifter Replacement	8/25/1967
SB 314	C	en	Limited Travel Valve Lifter Replacement	12/19/1969
SB 319	B	en	Reduction Gear Assembly Inspection	1/30/1970
SB 326		en	Crankcase Bearing Dowel Replacement	4/17/1970
SB 326	A	en	Crankcase Bearing Dowel Replacement	7/22/1977
SB 327	C	en	Inspection of Center Main Bearing	1/19/1973
SB 328		en	Limited Travel Valve Lifter Replacement	6/19/1970
SB 330	A	en	Retighten and Lockwire Carburetor Throttle Arm Screw	10/30/1970
SB 330	B	en	Retighten and Lockwire Carburetor Throttle Arm Screw	4/20/1973
SB 335		en	Fuel Line Inspection and Support Clamp Installation	4/16/1971
SB 335	A	en	Fuel Line Inspection and Support Clamp Installation	4/14/1972
SB 336	B	en	Periodic Inspection and Lubrication of Magneto Distributor Bushing. Magneto Parts Replacement - Left Magneto	6/19/1972
SB 336	C	en	Periodic Inspection and Lubrication of Magneto Distributor Bushing. Magneto Parts Replacement - Left Magneto	12/15/1972
SB 339	A	en	Turbocharger Exhaust System Inspection and Modification	3/29/1974
SB 342	A	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	5/26/1992
SB 342	B	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	10/22/1993
SB 342	C	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	4/28/2000
SB 342	D	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	7/10/2001
SB 342	E	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	5/18/2004
SB 342	F	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	6/4/2010
SB 342	G	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	7/16/2013
SB 342	G, Supp 1	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	8/29/2013
SB 342	G, Supp 2	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	1/23/2014
SB 342	G, Supp 3	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	11/2/2015
SB 342	G, Supp 4	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	2/14/2017
SB 342	G, Supp 5	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	3/13/2017
SB 342	G, Supp 6	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	4/17/2017
SB 342	G, Supp 7	en	Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation	2/27/2018
SB 350		en	Replacement of Torquemeter Oil Pump	7/21/1972
SB 351	A	en	Heavy Connecting Rods for High Speed Geared Drive Engines	4/27/1973
SB 351	B	en	Heavy Connecting Rods for High Speed Geared Drive Engines	11/22/1974
SB 356		en	Addition of Alternator Bracket Support	9/1/1972
SB 361		en	AiResearch Bulletin 1172-1A	2/16/1973
SB 362	A	en	Fuel Vent Line Check Valve Installation	12/14/1973
SB 364		en	Magneto Grommet Replacement	4/20/1973
SB 364	A	en	Magneto Grommet Replacement	7/5/1974
SB 366		en	Mandatory Carburetor Throttle Body Screw Inspection	9/14/1973
SB 366	A	en	Mandatory Carburetor Throttle Body Screw Inspection	10/12/2007
SB 366	B	en	Mandatory Carburetor Throttle Body Screw Inspection	4/18/2008
SB 366	C	en	Mandatory Carburetor Throttle Body Screw Inspection	6/2/2016
SB 367	C	en	Required Inspection of Part No. 69650 Piston Pin	12/7/1973
SB 367	D	en	Required Inspection of Part No. 69650 Piston Pin	3/8/1974
SB 367	F	en	Required Inspection of Part No. 69650 Piston Pin	8/16/1974
SB 367	F, Supp 1	en	Required Inspection of Part No. 69650 Piston Pin	9/17/1976
SB 369	I	en	Mandatory Engine Inspection after Overspeed	4/24/1991
SB 369	J	en	Mandatory Engine Inspection after Overspeed	11/22/2004
SB 369	K	en	Mandatory Engine Inspection after Overspeed	9/29/2010
SB 369	L	en	Mandatory Engine Inspection after Overspeed	4/18/2012
SB 369	M	en	Mandatory Engine Inspection after Overspeed	6/10/2016
SB 369	P	en	Mandatory Engine Inspection after Overspeed	9/19/2017
SB 369	Q	en	Mandatory Engine Inspection after Overspeed	4/26/2018
SB 369	R	en	Mandatory Engine Inspection after Overspeed	1/7/2019
SB 369	S	en	Mandatory Engine Inspection after Overspeed	4/8/2020
SB 371	A	en	Mandatory Connecting Rod Assemblies With High-Tensile Strength Bolts (New Rod Kits With High-Crush Bearings)	2/1/1974
SB 371	B	en	Mandatory Connecting Rod Assemblies With High-Tensile Strength Bolts (New Rod Kits With High-Crush Bearings)	5/4/1998
SB 372	A	en	High-Tensile T-Bolt Clamping Bands	3/15/1974
SB 374		en	Fuel Pump Inlet Inspection	3/15/1974
SB 375	A	en	Cross Shaft Support Tube Moisture Seal	5/10/1974
SB 376		en	Bendix Service Bulletin No. 556B	11/22/1974
SB 381	C	en	Mandatory Oil Pump Woodruff Key Drive and Impeller Replacement	11/7/1975
SB 382		en	Bendix Fuel System Bulletin No. RS43	1/17/1975
SB 385		en	Mandatory Oil Pump Impeller and Drive Replacement	4/4/1975
SB 385	C	en	Mandatory Oil Pump Impeller and Drive Replacement	10/3/1975
SB 385	C, Supp 1	en	Mandatory Oil Pump Impeller and Drive Replacement	3/18/1977
SB 388	A	en	Mandatory Procedure to Determine Exhaust Valve and Guide Condition	4/14/1978
SB 388	B	en	Mandatory Procedure to Determine Exhaust Valve and Guide Condition	5/13/1992
SB 388	C	en	Mandatory Procedure to Determine Exhaust Valve and Guide Condition	11/22/2004
SB 393	A	en	Mandatory Exhaust Slip Joint Modification	2/6/1976
SB 393	C	en	Mandatory Exhaust Slip Joint Modification	11/26/1976
SB 395		en	Transition Coupling Replacement	3/5/1976
SB 398		en	Mandatory Recommended Corrective Action for Use of Incorrect Fuel	4/30/1976
SB 398	A	en	Mandatory Recommended Corrective Action for Use of Incorrect Fuel	7/16/2010
SB 398	B	en	Mandatory Recommended Corrective Action for Use of Incorrect Fuel	11/22/2010
SB 399	A	en	Mandatory Action to Take If Loss of Oil Pressure	7/9/2010
SB 401		en	Mandatory Recommended Guidance After a Lightning Strike	6/30/1976
SB 401	A	en	Mandatory Recommended Guidance After a Lightning Strike	5/25/2017
SB 406	A	en	Mandatory Titan Fuel Pump Inspections	12/1/1997
SB 407		en	Oil Level Gage Assemblies	10/18/1976
SB 407	A	en	Oil Level Gage Assemblies	12/3/1976
SB 410		en	Bendix Service Bulletin No. 587	8/26/1977
SB 411	B	en	Mandatory Adapter Kit for Magneto Isolation Drive	12/18/1990
SB 411	C	en	Mandatory Adapter Kit for Magneto Isolation Drive	12/15/2009
SB 411	D	en	Mandatory Adapter Kit for Magneto Isolation Drive	11/30/2015
SB 412		en	Intake and Exhaust Valve Rocker Arm Retaining Stud	7/8/1977
SB 412	A	en	Intake and Exhaust Valve Rocker Arm Retaining Stud	9/2/1977
SB 412	B	en	Intake and Exhaust Valve Rocker Arm Retaining Stud	3/10/1978
SB 413		en	Hydraulic Tappet Face Inspection	7/8/1977
SB 414		en	Bendix Service Bulletin No. 589	8/26/1977
SB 415		en	Bendix Service Bulletin No. 590	8/26/1977
SB 416		en	Bendix Service Bulletin No. 584A	10/7/1977
SB 421		en	Fuel Line Between Fuel Pump and Fuel Injector	6/16/1978
SB 422	A	en	Crankshaft Assembly Replacement	12/22/1978
SB 423		en	Mandatory Oil Pump Inspection and Impeller Replacement	3/24/1978
SB 424		en	Mandatory Hydraulic Tappet Replacement	3/24/1978
SB 425	C	en	Mandatory Reprint of Teledyne Continental Ignition Systems Mandatory Service Bulletin No. MSB645	3/14/1997
SB 426		en	Turbocharger Oil Drain Flange Replacement	8/11/1978
SB 428		en	Mandatory Bendix Fuel Injector Bulletin No. RS-52	7/28/1978
SB 429		en	Mandatory Bendix Fuel Injector Service Bulletin No. RS-53	7/28/1978
SB 430		en	Mandatory Bendix Service Bulletin No. RS-54	7/28/1978
SB 432		en	Mandatory Slick Electro Service Bulletin No. l-78 "Magneto/Condenser Replacement"	10/16/1978
SB 433	A	en	Mandatory Bendix Service Bulletin No. W-57, Rev. 1	1/12/1979
SB 434		en	Mandatory Marvel-Schebler/Tillotson Service Bulletin No. Al-79	3/23/1979
SB 435		en	Replacement of Upper Exhaust Spring Seat and Hydraulic Lifter	3/17/1979
SB 439	A	en	Mandatory Inspection of Connecting Rods for Fretting and/or Galling and Repair of Fretting	8/18/1993
SB 444	A	en	Bendix Bulletin No. RS-62, Rev 2	9/4/1981
SB 446	B	en	Mandatory The Use of Textron Lycoming LW-16702 Oil Additive	9/8/1980
SB 446	C	en	Mandatory The Use of Textron Lycoming LW-16702 Oil Additive	11/23/1984
SB 446	D	en	Mandatory The Use of Textron Lycoming LW-16702 Oil Additive	3/10/1999
SB 446	E	en	Mandatory The Use of Textron Lycoming LW-16702 Oil Additive	7/18/2008
SB 447		en	Mandatory Inspection of Upper Exhaust Valve Spring Seats	1/11/1980
SB 447	B	en	Mandatory Inspection of Upper Exhaust Valve Spring Seats	1/20/1995
SB 448		en	Mandatory Turbocharger Transition Waste Gate Assembly	2/22/1980
SB 448	A\	en	Mandatory Turbocharger Transition Waste Gate Assembly	11/20/1995
SB 450		en	AiResearch Service Bulletin No. TP60-0119	9/5/1980
SB 453	C	en	Mandatory Aluminum Push Rods P/N 73806 on O-235 Series Engines	7/3/1993
SB 453	D	en	Mandatory Aluminum Push Rods P/N 73806 on O-235 Series Engines	1/10/1997
SB 454	B	en	Replacement of Oil Pump Impellers	1/2/1987
SB 455	A	en	Replacement of Oil Pump Impellers	4/24/1981
SB 455	B	en	Replacement of Oil Pump Impellers	5/28/1982
SB 455	D	en	Replacement of Oil Pump Impellers	1/2/1987
SB 456	A	en	Mandatory Replacement of Sintered Iron Oil Pump Impellers	9/25/1981
SB 456	C	en	Mandatory Replacement of Sintered Iron Oil Pump Impellers	1/2/1987
SB 456	F	en	Mandatory Replacement of Sintered Iron Oil Pump Impellers	2/8/1993
SB 464	A	en	Bendix Service Bulletin Revision No. 623A	10/18/1985
SB 465	A	en	Mandatory Crankshaft Flange Inspection for Aerobatic Engines	1/6/1984
SB 465	C	en	Mandatory Crankshaft Flange Inspection for Aerobatic Engines	7/2/1993
SB 467		en	Bendix Bulletin No. RS-88	6/17/1983
SB 468	B	en	Mandatory Slick Service Bulletin No. SB 2-88	10/12/1988
SB 469		en	Bendix Service Bulletin No. 627	10/18/1985
SB 471		en	Mandatory Avco Lycoming Oil Additive P/N LW-16702	9/20/1985
SB 471	B	en	Mandatory Avco Lycoming Oil Additive P/N LW-16702	2/20/2009
SB 475	A	en	Mandatory Crankshaft Gear Modification and Assembly Procedures	7/16/1990
SB 475	B	en	Mandatory Crankshaft Gear Modification and Assembly Procedures	4/23/1993
SB 475	C	en	Mandatory Crankshaft Gear Modification and Assembly Procedures	1/30/2003
SB 475	C, Supp 1	en	Mandatory Crankshaft Gear Modification and Assembly Procedures	9/12/2016
SB 477 (w/Supp 1)	A	en	Mandatory Inspection and Rework of P/N LW-18790 Rocker Arm Assembly	2/16/1987
SB 480		en	Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action	1/18/1988
SB 480	A	en	Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action	5/4/1998
SB 480	C	en	Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action	2/26/1999
SB 480	D	en	Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action	7/13/2000
SB 480	E	en	Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action	4/13/2005
SB 480	F	en	Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action	5/25/2017
SB 481		en	Facet Aerospace Products Service Bulletin No. A1-87	12/9/1987
SB 484		en	Inspection, Alignment and Modification of Crossover Exhaust Assembly	1/30/1989
SB 485		en	Mandatory Reprint of Precision Airmotive Corporation Service Bulletin #PRS-92	6/1/1989
SB 486		en	Inspection of Single Belt Driven Ring Gear Support Assemblies	8/4/1989
SB 487		en	Mandatory Fuel Pump Vent Restriction	7/7/1989
SB 488	A	en	Mandatory Propeller Governor Line Support	4/2/1990
SB 491	A	en	Mandatory Inspection of Exhaust Transition Bolts	2/21/1990
SB 494		en	Mandatory Installation of Restricted Fuel Pump Vent Fittings	11/1/1990
SB 497		en	Mandatory Installation of New, Restricted Fuel Pump Vent Fittings in an Drive Fuel Pumps	11/15/1990
SB 499		en	Mandatory Installation of One-Piece Exhaust Pipe Kit (05K21503)	3/19/1991
SB 499	A	en	Mandatory Installation of One-Piece Exhaust Pipe Kit (05K21503)	6/14/1991
SB 499	B	en	Mandatory Installation of One-Piece Exhaust Pipe Kit (05K21503)	3/22/1993
SB 501	B	en	Recall of Piston Pin Part No. LW-14077	11/15/1991
SB 504		en	Mandatory Consolidated Fuel Systems Inc. Mandatory Service Bulletin No. CF1-92, Rev 1 - Carburetor Float Kit CF666-915 with CF30-766 Float Date Stamped 1091	8/17/1992
SB 505		en	Mandatory Inspection of Crankshaft I.D. for Corrosion	8/19/1994
SB 505	A	en	Mandatory Inspection of Crankshaft I.D. for Corrosion	10/18/1994
SB 505	B	en	Mandatory Inspection of Crankshaft I.D. for Corrosion	12/1/1997
SB 516	A	en	Mandatory Inspection and Removal of TCM and Bendix S-20 and S-1200 Series Impulse Coupling Magnetos	9/9/2016
SB 517		en	Mandatory Reprint of Teledyne Continental Motors Critical Service Bulletin No. CSB641	2/25/1994
SB 518		en	Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves	11/4/1994
SB 518	A	en	Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves	2/3/1995
SB 518	B	en	Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves	3/21/1995
SB 518	C	en	Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves	5/2/1995
SB 518	D	en	Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves	8/16/2016
SB 519		en	Mandatory Removal of Shroud Tube Retaining Springs LW-14995 on Specified Engine and Affected Spares Before Further Notice	5/25/1994
SB 520		en	Mandatory Incorrect Piston Shipped with Cylinder Kits P/N 05K21108, P/N 05K21118 and P/N 05K21104	7/22/1994
SB 522		en	Mandatory Inspection and Replacement of Push Rod P/N 73806	11/1/1994
SB 524		en	Mandatory I. Replacement of Sintered Iron Oil Pump Impellers II. Replacement of Aluminum Oil Pump Impellers	9/1/1995
SB 524	Supp 1	en	Mandatory I. Replacement of Sintered Iron Oil Pump Impellers II. Replacement of Aluminum Oil Pump Impellers	1/18/1996
SB 525		en	Mandatory Inspection of High-Pressure Fuel Pump P/N LW-15473	9/3/1996
SB 525	A	en	Mandatory Inspection of High-Pressure Fuel Pump P/N LW-15473	10/7/1996
SB 526		en	Mandatory Replacement of Impulse Coupling Springs or Impulse Coupling Assembly on TCM (Bendix) D-2000 and D-3000 Impulse Dual Magnetos	2/24/1997
SB 527	A	en	Mandatory Recall of Piston Pin Part No. LW-14077	10/1/1996
SB 527	B	en	Mandatory Recall of Piston Pin Part No. LW-14077	10/8/1996
SB 527	C	en	Mandatory Recall of Piston Pin Part No. LW-14077	4/18/1997
SB 528		en	Mandatory Reprint of Teledyne Continental Ignition System Service Bulletin No. SB658	1/10/1997
SB 529		en	Mandatory Reprint - Crane/Lear Romec Service Bulletin No. 101SB020	12/1/1997
SB 529	A	en	Mandatory Reprint - Crane/Lear Romec Service Bulletin No. 101SB020	8/2/1999
SB 529	B	en	Mandatory Reprint - Crane/Lear Romec Service Bulletin No. 101SB020	6/10/2002
SB 530		en	Mandatory Application of Protective Coating on Crankshaft	12/1/1997
SB 530	A	en	Mandatory Application of Protective Coating on Crankshaft	6/29/1998
SB 530	B	en	Mandatory Application of Protective Coating on Crankshaft	11/22/2004
SB 530	B, Supp 1	en	Mandatory Application of Protective Coating on Crankshaft	10/10/2014
SB 531		en	Mandatory Insepction of Turbochargers and Tailpipes on TIO-540-AE2A Engines	1/15/1997
SB 532	Supp 1	en	Mandatory Reprint - Precision Airmotive Corporation Service Bulletin No. PRS-103	10/12/1998
SB 533	A	en	Mandatory Recommended Action for Sudden Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip	8/9/1999
SB 533	B	en	Mandatory Recommended Action for Sudden Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip	10/4/2012
SB 533	C	en	Mandatory Recommended Action for Sudden Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip	10/18/2016
SB 534		en	Mandatory I. Turbocharger Oil Drain Tank Inspection II. Turbocharger Oil Drain Tank Replacement	3/24/1999
SB 537		en	Mandatory Reprint of Slick Service Bulletin No. SB1-98	11/20/1998
SB 538	A	en	Air Inlet Tube Replacement	8/2/1999
SB 539	A	en	Mandatory Reprint of Crane/Lear Romec Service Bulletins No. RG9080-73-001, No. RG9570-73-001, and No. RG17980-73-001	11/22/2000
SB 540		en	Mandatory Valve Seat Inspection	10/11/1999
SB 541		en	Mandatory Reprint of Teledyne Continental Motors (TCM) Ignition Systems Critical Service Bulletin No. CSB662A	2/22/2000
SB 543	A	en	Mandatory Oil Filter Converter Plate Gasket Replacement (Owner Advisory)	8/30/2000
SB 543	A, Supp 1	en	Mandatory Oil Filter Converter Plate Gasket Replacement	10/4/2000
SB 543	B	en	Mandatory Oil Filter Converter Plate Gasket Replacement	7/1/2003
SB 543	C	en	Mandatory Oil Filter Converter Plate Gasket Replacement	9/29/2010
SB 543	C, Supp 1	en	Mandatory Oil Filter Converter Plate Gasket Replacement	8/31/2012
SB 544	A	en	Mandatory Bearing Replacement - Part Identification	4/2/2003
SB 544	B	en	Mandatory Bearing Replacement - Part Identification	10/6/2006
SB 545		en	Mandatory Oil Filler Tube Replacement	2/20/2001
SB 545	A	en	Mandatory Oil Filler Tube Replacement	10/2/2001
SB 547		en	Mandatory Connecting Rod Bearing Replacement on TIO-540-AE2A Model Engines (Compliance with Textron Lycoming Special Advisory No. 59-800)	3/7/2001
SB 547	Supp 1	en	Mandatory Connecting Rod Bearing Replacement on TIO-540-AE2A Model Engines (Compliance with Textron Lycoming Special Advisory No. 59-800)	4/28/2003
SB 548		en	Mandatory Diaphragm - Type Fuel Pump Inspection/Replacement	3/8/2001
SB 548	A	en	Mandatory Diaphragm - Type Fuel Pump Inspection/Replacement	8/31/2005
SB 549		en	Mandatory Engine/Crankshaft Inspection	3/23/2001
SB 549	Supp 1	en	Mandatory Engine/Crankshaft Inspection	10/5/2001
SB 550		en	Mandatory Crankshaft Replacement in Lycoming TIO & LTIO-540 Engines Rated at 300 Horsepower and Higher (Info)	2/1/2002
SB 552		en	Mandatory Crankshaft Replacement in Lycoming TIO & LTIO-540 Engines Rated at 300 Horsepower and Higher	4/16/2002
SB 552	Supp 1	en	Mandatory Crankshaft Replacement in Lycoming TIO & LTIO-540 Engines Rated at 300 Horsepower and Higher	9/5/2002
SB 553		en	Mandatory Crankshaft Inspection for Lycoming Six Cylinder Turbocharged Engines	9/16/2002
SB 553	Supp 1	en	Mandatory Crankshaft Inspection for Lycoming Six Cylinder Turbocharged Engines	12/16/2002
SB 554		en	Mandatory Crankshaft Gear Retaining Bolt Replacement	9/30/2002
SB 554	Supp 1	en	Mandatory Crankshaft Gear Retaining Bolt Replacement	9/30/2002
SB 554	Supp 2	en	Mandatory Crankshaft Gear Retaining Bolt Replacement	11/4/2002
SB 554	Supp 3	en	Mandatory Crankshaft Gear Retaining Bolt Replacement	11/12/2002
SB 554	Supp 4	en	Mandatory Crankshaft Gear Retaining Bolt Replacement	4/2/2003
SB 554	Supp 5	en	Mandatory Crankshaft Gear Retaining Bolt Replacement	8/15/2003
SB 555		en	Mandatory Oil Pump Body Plug Inspection	11/25/2002
SB 555	A	en	Mandatory Oil Pump Body Plug Inspection	5/16/2003
SB 555	Supp 1	en	Mandatory Oil Pump Body Plug Inspection	1/8/2003
SB 555	Supp 2	en	Mandatory Oil Pump Body Plug Inspection	1/20/2003
SB 556		en	Mandatory Replacement of Washer P/N LW-11201	1/29/2003
SB 557		en	Mandatory Reprint - Precision Airmotive Corporation SB No. PRS-105	5/7/2003
SB 558		en	Mandatory Inspection of Oil Suction Screen Area for Casting Voids	11/17/2003
SB 559		en	Mandatory Reprint - Kelly Aerospace Power Systems (Electrosystems) SB No. A-112, Rev. A	3/23/2004
SB 561		en	Mandatory Connecting Rod Bearing Replacement on (L)TIO-540-U2A, -V2AD & -W2A Engines	8/6/2004
SB 564		en	Mandatory Inspection of Suction Screen Length	12/10/2004
SB 564	A	en	Mandatory Inspection of Suction Screen Length	8/22/2008
SB 565		en	Mandatory Diaphragm - Type Fuel Pump Inspection/Replacement	2/21/2005
SB 566		en	Mandatory Crankshaft Replacement in Lycoming Engines (Info)	7/11/2005
SB 566	Supp 1	en	Mandatory Crankshaft Replacement in Lycoming Engines	11/30/2005
SB 568		en	Mandatory Reprint of Slick Aircraft Products Service Bulletin No. SB1-88B	3/27/2006
SB 569		en	Mandatory Crankshaft Retirement for Certain Lycoming Engines	2/21/2006
SB 569	A	en	Mandatory Crankshaft Retirement for Certain Lycoming Engines	4/11/2006
SB 569	A, Supp 1	en	Mandatory Crankshaft Retirement for Certain Lycoming Engines	5/27/2009
SB 571		en	Mandatory Reprint of Sky-Tec Service Bulletin No. 2006-3-1 (Replacement of Specified Sky-Tec Starters - Model 31B22101/149-24PM)	5/5/2006
SB 572		en	Mandatory Missing Oil Passage Hole at Idler Shaft Location	10/30/2006
SB 573		en	Mandatory Pressurized Magneto Pressure Tests	2/23/2007
SB 573	Supp 1	en	Mandatory Pressurized Magneto Pressure Tests	3/16/2007
SB 574		en	Mandatory Cylinder Stud Hole Cross-Threaded	2/23/2007
SB 574	A	en	Mandatory Cylinder Stud Hole Cross-Threaded	7/20/2007
SB 576		en	Mandatory Reprint of Teledyne Continental Ignition Systems Service Bulletin No. SB633A	9/21/2007
SB 577		en	Mandatory Reprint of Sky-Tec Service Bulletin No. 07-01, Rev D (Sky-Tec PM Model Starter Replacement)	5/17/2007
SB 577	A	en	Mandatory Reprint of Sky-Tec Service Bulletin No. 07-01, Rev D (Sky-Tec PM Model Starter Replacement)	9/19/2008
SB 578		en	Mandatory Incorrect Cylinder Assemblies Shipped with Cylinder Kits	9/21/2007
SB 579		en	Mandatory Clearance Between Oil Sump Assembly and Oil Sump Baffle	11/16/2007
SB 580		en	Mandatory Reprint of Kelly Aerospace Service Bulletin No. 029	2/15/2008
SB 581		en	Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin Nos. PRS-107, Rev 4 and PEX-1, Rev 1	3/13/2008
SB 581	A	en	Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin Nos. PRS-107, Rev 4 and PEX-1, Rev 1	11/19/2008
SB 582		en	Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin No. MSA-13	7/18/2008
SB 582	A	en	Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin No. MSA-13	10/10/2008
SB 582	A, Supp 1	en	Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin No. MSA-13	12/15/2009
SB 583		en	Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB2-08	6/3/2008
SB 583	A	en	Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB2-08	7/21/2008
SB 584		en	Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB3-08A	6/3/2008
SB 584	A	en	Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB3-08A	7/24/2008
SB 584	B	en	Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB3-08A	10/17/2008
SB 585		en	Mandatory Incorrect Exhaust Valve Rotator Cap Shipped with Cylinder Kits P/N 05K21119, 05K21121, and 05K21122	3/17/2009
SB 590	A	en	Mandatory Use of Aircraft Boost Pump with Kelly Aerospace 200F Series (Lycoming P/N 62E23185, 62E23186, 62E23187, 62E23188, 62E23189) Fuel Pumps	11/13/2009
SB 591		en	Mandatory Reprint of Kelly Mandatory Service Bulletin No. 039A, Turbine Wheel Replacement	3/19/2010
SB 591	A	en	Mandatory Reprint of Kelly Mandatory Service Bulletin No. 039A, Turbine Wheel Replacement	5/10/2010
SB 592		en	Mandatory Engine Inspection After Overboost	9/29/2010
SB 593		en	Mandatory Intake Valve P/N 17A23942 Inspection for Date Stamp	8/24/2010
SB 593	A	en	Mandatory Intake Valve P/N 17A23942 Inspection for Date Stamp	7/23/2014
SB 593	B	en	Mandatory Intake Valve P/N 17A23942 Inspection for Date Stamp	7/6/2015
SB 594		en	Mandatory Reprint of Hartzell Engine Technologies LLC (HET) (formerly Kelly Aerospace) Mandatory Service Bulletin 040 A	1/10/2011
SB 595		en	Mandatory Torque Values for Screws that Attach Ignition Harness Attachment Plate (for S-20 and S-200 Series Teledyne Continental Motors (TCM) Magnetos)	5/6/2011
SB 596		en	Mandatory Reprint of AVStar Mandatory Service Bulletin AFSSB6 Revision 2	4/27/2011
SB 597		en	Mandatory Fuel Drain Valve Adapter Assembly P/N LW-13807	5/4/2011
SB 598	A	en	Mandatory V-Band Clamp P/N LW-12125-3 (Aeroquip P/N NH1008723-10) and LW-12093-6 (Aeroquip P/N MVT69183-225) on Turbocharged Engines	6/1/2011
SB 599		en	Mandatory Compliance with Hartzell Engine Technologies, LLC (Previously Kelly Aerospace) Service Bulletin No. 045, 201F Fuel Pump Inspection and Recall	3/14/2012
SB 601		en	Mandatory Non-Compliant Oil Fill Tubes P/N 77527	11/22/2011
SB 602		en	Mandatory Incorrect Part Numbers on Service Instruction No. 1098G	3/8/2012
SB 603		en	Mandatory Reprint of Slick Service Bulletin SB112	10/4/2012
SB 603	Supp 1	en	Mandatory Reprint of Slick Service Bulletin SB112	10/9/2012
SB 604		en	Mandatory Compliance with Hartzell Engine Technologies (HET), LLC (Previously Kelly Aerospace) Alert Service Bulletin No. 048 dated 11/16/2012, Turbocharger model TAO411, P/N 4101880019 Turbine Wheel Replacement	11/21/2012
SB 606		en	Mandatory Correction of Engine Data Plate on IO-540-AE1A5 Engines	2/13/2014
SB 608		en	Mandatory Replacement of Hartzell Engine Technologies Fuel Pump Assemblies	2/6/2014
SB 608	Supp 1	en	Mandatory Replacement of Hartzell Engine Technologies Fuel Pump Assemblies	5/7/2015
SB 612		en	Mandatory Oil Level Gage Replacement	4/5/2016
SB 613		en	Mandatory Compliance with Hartzell Engine Technologies (HET), LLC (Previously Kelly Aerospace) Alert Service Bulletin No. 057 dated 2/11/14, Turbocharger Back Plate Assembly P/N 4067950058 Replacement	3/6/2014
SB 614		en	Mandatory Exhaust System Inspection and Turbocharger Mounting Bracket Replacement	7/24/2014
SB 614	A	en	Mandatory Exhaust System Inspection and Turbocharger Mounting Bracket Replacement	10/10/2014
SB 615		en	Mandatory Diaphragm-Type Fuel Pump Replacement	12/5/2014
SB 617		en	Mandatory Fuel Pumps P/N 62B26931 Shipped from the Factory from December 16, 2014 through January 14, 2015 not Marked with "SB615" Stamp	2/5/2015
SB 619		en	Mandatory Hardness Check for Rocker Arm, Part Number LW-15014	4/9/2015
SB 621	A	en	Mandatory Diaphragm-Type Fuel Pump Replacement	9/2/2015
SB 621	B	en	Mandatory Diaphragm-Type Fuel Pump Replacement	10/5/2015
SB 622		en	Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-15A	7/23/2015
SB 622	A	en	Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-15A	3/13/2019
SB 623		en	Mandatory Reprint of Hartzell Engine Technologies (HET) Service Bulletin SB-062	2/3/2016
SB 624		en	Mandatory Reprint of Hartzell Engine Technologies (HET) Service Bulletin SB-065	6/17/2016
SB 625		en	Mandatory Alternator Fan Backplate	2/2/2016
SB 626		en	Mandatory AVStar Flow Divider (Lycoming Fuel Manifold) Inspection	6/29/2016
SB 626	A	en	Mandatory AVStar Flow Divider (Lycoming Fuel Manifold) Inspection	12/20/2017
SB 627		en	Mandatory Exhaust System Inspection	7/18/2016
SB 627	A	en	Mandatory Exhaust System Inspection	8/31/2016
SB 627	B	en	Mandatory Exhaust System Inspection	10/18/2016
SB 627	C	en	Mandatory Exhaust System Inspection	11/17/2016
SB 627	C, Supp 1	en	Mandatory Exhaust System Inspection	6/27/2017
SB 627	D	en	Mandatory Exhaust System Inspection	4/10/2018
SB 627	E	en	Mandatory Exhaust System Inspection	5/17/2018
SB 628		en	Mandatory Reprint of Hartzell Engine Technologies (HET) Alert Service Bulletin (ASB) 076	8/29/2017
SB 628	A	en	Mandatory Reprint of Hartzell Engine Technologies (HET) Alert Service Bulletin (ASB) 076	12/8/2022
SB 630		en	Mandatory Connecting Rod Bushing Inspection After Cylinder Removal	4/10/2017
SB 630	A	en	Mandatory Connecting Rod Bushing Inspection After Cylinder Removal	6/13/2017
SB 630	B	en	Mandatory Connecting Rod Bushing Inspection After Cylinder Removal	6/11/2025
SB 632		en	Mandatory Identification of Connecting Rods with Non-Conforming Small End Bushings	7/17/2017
SB 632	A	en	Mandatory Identification of Connecting Rods with Non-Conforming Small End Bushings	7/23/2017
SB 632	B	en	Mandatory Identification of Connecting Rods with Non-Conforming Small End Bushings	8/4/2017
SB 633		en	Mandatory Oil Level Gage (Dipstick) Replacement	12/20/2017
SB 634		en	Mandatory Cylinder and Head Assembly Serviceable Life	10/11/2018
SB 637		en	Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-19	3/14/2019
SB 639		en	Mandatory Inspection of Rocker Arm, Part Number LW-15014	1/17/2020
SB 642		en	Mandatory Incorrect Piston and Ring Combination	3/22/2021
SB 642	A	en	Mandatory Incorrect Piston and Ring Combination	6/16/2021
SB 643		en	Mandatory Crankcase Nut Safety Wire Inspection	9/16/2021
SB 645		en	Mandatory Small End Connecting Rod Bushing Inspection	9/24/2021
SB 646		en	Mandatory T-Bolt Clamp Inspection	1/14/2022
SB 646	A	en	Mandatory T-Bolt Clamp Inspection	4/22/2022
SB 647		en	Mandatory Incorrect Markings on Service Tool# ST-310	12/14/2021
SB 648		en	Mandatory Wastegate Solenoid Valve Inspection and Cleaning	12/2/2021
SB 648	A	en	Mandatory Wastegate Solenoid Valve Inspection and Cleaning	2/21/2022
SB 648	B	en	Mandatory Wastegate Solenoid Valve Inspection and Cleaning	4/4/2022
SB 648	C	en	Mandatory Wastegate Solenoid Valve Inspection and Cleaning	2/20/2025
SB 649		en	Mandatory Installation of Correct Electronic Ignition System (EIS)	12/8/2022
SB 650		en	Mandatory Intake Pipe and Flange Inspection	1/4/2023
SB 651		en	Mandatory Inspection for Rotator Caps on Intake Valves	9/29/2022
SB 653		en	Mandatory Hartzell Engine Tech (HET) Alert Service Bulletin (ASB) No. 098	9/8/2023
SB 655		en	Mandatory Hartzell Engine Tech (HET) Service Bulletin (SB) No. 203	1/4/2024
SB 656		en	Mandatory Replacement of 6-Cylinder Electronic Ignition System (EIS)	2/13/2024
SB 656	A	en	Mandatory Replacement of 6-Cylinder Electronic Ignition System (EIS)	4/2/2025
SB 658		en	Mandatory Starter Inspection, Hartzell Engine Tech (HET) Service Bulletin (SB) No.211	1/8/2025
SB 660		en	Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-24A	9/20/2024
SB 661		en	Mandatory STD-35 Plain Washer Replacement	2/20/2025
SB 5508-0013		en	Introduction of Accessory Drive Gear Assembly 2-070-000-11 and No. 3 Bearing Support 2-060-261-04	3/15/1978
SB 5508-003		en	Special Inspection of Compressor Bleed Band
SB 5508-0031	1	en	Special One Time Inspection of First Turbine Rotor Assembly	8/19/1986
SB 5508-007		en	Introduction of Improved Bleed Band 2-161-182-03 and New Retainers 2-160-561-01	4/30/1976
SB 41000470-67A-05	1	en	Alert Flight Controls - Hydraulic Servo Actuator Inspection for Damaged Locking Washer	10/19/2000
SB 41105950-67A-01		en	Alert Flight Controls - Hydraulic Irreversible and Servo Actuator Inspection for Damaged Locking Washer	10/19/2000
SB A-ALF 502R 73-12	1	en	Alert Fuel - Fuel Control - Introduction of Improved Fuel Control That Incorporates a Special Fuel Schedule and Bleed Band Operating Limits	4/7/1992
SB A-ALF 502R 73-12	2	en	Alert Fuel - Fuel Control - Introduction of Improved Fuel Control That Incorporates a Special Fuel Schedule and Bleed Band Operating Limits	3/4/1993
SB A-LT101-72-50-0163	1	en	Alert Turbine Section - One Time Inspection Winged No. 2 Bearing P/N 4-301-362-01	3/8/1994
SB ALF 502 72-0002	22	en	Time Limits - Component Service-Life Limits	12/23/1992
SB ALF 502-72-0004	11	en	Component Service-Life Limits	6/17/1987
SB ALF 502-72-0008	1	en	Replacement of No. 4 and 5 Bearing Oil Inlet Tubes	10/14/1980
SB ALF 502-72-0010		en	Introduction of Improved Fourth Turbine Nozzle and Fireshield	10/14/1980
SB ALF 502-72-0038	1	en	Introduction of Improved Fourth Turbine Rotor Assembly	3/4/1983
SB ALF 502-79-0092		en	Introduction of Improved Chip Detector	5/4/1984
SB ALF502L-72-0137		en	Compressor Section - Fourth Stage Compressor Vane Assembly - Inspection of Fourth Stage Compressor Vane Assembly	3/27/1986
SB ALF502L-72-0163		en	Gas Producer - Introduction of Turbine Spacers 2-121-071-31/-35	6/8/1987
SB ALF502L 72-203	3	en	Engine - Third Stage Disc - Special Inspection of Third Stage Disc Assembly 2-101-630-04/-05	12/7/1990
SB ALF502L 72-259		en	Engine - Compressor Rotor Third Stage Disc Assembly - One Time Inspection/Replacement of Compressor Rotor Third Stage Disc Assembly Coated with Suspect Sermetal W	8/13/1991
SB ALF502L 72-270		en	Engine - Shaft Assembly - Introduction of Improved or Reworked Third Turbine Rotor Shaft Assembly (Bladed or Unbladed)	4/30/1993
SB ALF502R-72-0160	1	en	Reduction Gear and Shaft - Chip Detector Inspection Requirements	3/23/1987
SB ALF502R-72-0160	2	en	Reduction Gear and Shaft - Chip Detector Inspection Requirements	5/26/1987
SB ALF502R-72-0163		en	Gas Producer - Introduction of Turbine Spacers 2-121-071-31/35	6/8/1987
SB ALF502R-79-0162		en	Oil-Distribution - One Time Inspection of Oil Filter Bypass Valve	3/23/1987
SB ALF502R-79-0162	1	en	Oil-Distribution - One Time Inspection of Oil Filter Bypass Valve	5/26/1987
SB ALF502R-79-0162	2	en	Oil-Distribution - One Time Inspection of Oil Filter Bypass Valve	9/8/1987
SB ALF502R 72-203	2	en	Engine - Gas Producer Module - Special Inspection of Third Stage Disc Assembly 2-101-630-04/-05	8/8/1990
SB ALF502R 72-218	1	en	Engine - Gas Producer Module - Alternate Special Inspection of Third Stage Disc Assembly 2-101-630-04/-05	12/1/1989
SB ALF502R 72-237		en	Engine - Gas Producer Module - Third Stage Compressor Disc Assembly 2-101-630-04/-05 Alternate Special Inspection	11/30/1989
SB ALF502R 72-259		en	Engine - Compressor Rotor Third Stage Disc Assembly - One Time Inspection/Replacement of Compressor Rotor Third Stage Disc Assembly Coated with Suspect Sermetal W	8/13/1991
SB ALF502R 72-270	1	en	Engine - Shaft Assembly - Introduction of Improved or Reworked Third Turbine Rotor Shaft Assembly (Bladed or Unbladed)	3/31/1992
SB ALF502R 72-281		en	Engine-Components - Removal of Certain Time/Life Sensitive Rotating Components	2/7/1992
SB LT 101-71-00-0002	12	en	Rotating Component Service-Life Limit	5/31/1991
SB LT 101-72-00-0093	2	en	Power Turbine Rotor Periodic Inspection	5/12/1987
SB LT 101-72-00-0093	3	en	Power Turbine Rotor Periodic Inspection	5/29/1987
SB LT 101-72-00-0093	5	en	Power Turbine Rotor Periodic Inspection	1/15/1990
SB LT 101-72-30-0088	5	en	Introduction of Improved Axial Compressors P/N 4-101-006-28/-32/-39/-41	9/25/1992
SB LT 101-72-40-0103		en	Rear Bearing Support Housing (RBSH) Cleaning Procedure	1/15/1988
SB LT 101-72-50-0079	1	en	Introduction of Improved Gas Producer Turbines	4/21/1986
SB LT 101-72-50-0144		en	Turbine Section - One Time Inspection Power Turbine Rotor Assembly P/N 4-141-290-01/03	1/15/1993
SB LT 101-72-50-0145		en	Turbine Section - One Time Inspection Power Turbine Rotor Assembly P/N 4-141-290-01	11/27/1991
SB LT 101-72-50-0150		en	Turbine Section - One Time Inspection of Gas Producer Rotor Discs P/N 4-111-015-04, -09, -14	9/1/1993
SB LT 101-73-20-0165		en	Fuel System - One Time Inspection of Fuel Pump Internal Drive Spline	9/1/1994
SB LT 101-77-30-0104	1	en	Chip Detector Inspection Requirements	3/18/1988
SB LTS 101A-73-0043		en	Introduction of Overspeed Limiter	3/21/1983
SB LTS 101B-72-50-0116	6	en	Power Turbine Retention System - Installation	8/14/1992
SB LTS 101B-72-50-0122	4	en	Introduction of Power Turbine Retention System and Improved Power Turbine Rotor Assembly	6/17/1991
SB LTS 101B-73-10-0127	2	en	Engine Fuel and Control - Introduction of Over Speed Protection System	8/14/1992
SB LTS 101C-72-00-0131		en	Engine - Avoidance of Certain Power Turbine Speeds	9/17/1990
SB LTS 101C-72-50-0119	2	en	Introduction of Power Turbine Retention System and Improved Power Turbine Rotor Assembly	6/17/1991
SB LTS 101C-73-10-0129	3	en	Engine Fuel and Control - Introduction of Over Speed Protection System	8/14/1992
SB T5313B/17-0020	4	en	Engine - Rotating Component Service - Life Limit	7/5/1994
SB T5313B/17-0052	2	en	Special Inspection - Centrifugal Compressor Impeller	12/16/1993
SB T5508D-0002	7	en	Rotating Component Service-Life Limit	6/25/1993
SB T5508D-0040		en	Engine-Components - Removal of Time/Cycle Sensitive Impeller (Drawdown)	6/25/1993

Service Instructions
Name	Revision	Lang	Subject	Date
SI 1002		en	Proper Maintenance of Carburetor Air Filters	3/4/1960
SI 1008	C	en	Installation of Thermostatic Oil Cooler Bypass Valve	7/21/2016
SI 1009	AJ	en	Required Time Between Overhaul (TBO) Schedule	7/1/1992
SI 1009	AL	en	Required Time Between Overhaul (TBO) Schedule	5/11/1998
SI 1009	AQ	en	Required Time Between Overhaul (TBO) Schedule	1/12/2001
SI 1009	AR	en	Required Time Between Overhaul (TBO) Schedule	6/22/2004
SI 1009	AS	en	Required Time Between Overhaul (TBO) Schedule	5/25/2006
SI 1009	AT	en	Required Time Between Overhaul (TBO) Schedule	5/9/2008
SI 1009	AU	en	Required Time Between Overhaul (TBO) Schedule	11/18/2009
SI 1009	AV	en	Required Time Between Overhaul (TBO) Schedule	7/8/2013
SI 1009	AW	en	Required Time Between Overhaul (TBO) Schedule	2/24/2014
SI 1009	AY	en	Required Time Between Overhaul (TBO) Schedule	2/26/2016
SI 1009	AZ	en	Required Time Between Overhaul (TBO) Schedule	2/1/2017
SI 1009	BA	en	Required Time Between Overhaul (TBO) Schedule	6/15/2017
SI 1009	BB	en	Required Time Between Overhaul (TBO) Schedule	8/15/2017
SI 1009	BC	en	Required Time Between Overhaul (TBO) Schedule	5/9/2018
SI 1009	BD	en	Required Time Between Overhaul (TBO) Schedule	2/13/2019
SI 1009	BE	en	Required Time Between Overhaul (TBO) Schedule	4/24/2020
SI 1009	L	en	Required Time Between Overhaul (TBO) Schedule	6/1/1968
SI 1011	G	en	Tappets and Lifters	3/2/1979
SI 1011	H	en	Tappets and Lifters	5/23/1997
SI 1011	J	en	Tappets and Lifters	2/23/2012
SI 1011	K	en	Tappets and Lifters	6/27/2013
SI 1011	L	en	Tappets and Lifters	1/21/2015
SI 1011	M	en	Tappets and Lifters	4/10/2018
SI 1011	N	en	Tappets and Lifters	1/7/2019
SI 1012	F, Supp 2	en	Counterweights and Rollers on Engine Models	8/7/2009
SI 1012	G	en	Counterweights and Rollers on Engine Models	8/30/2011
SI 1012	G, Supp 1	en	Counterweights and Rollers on Engine Models	3/6/2012
SI 1012	G, Supp 2	en	Counterweights and Rollers on Engine Models	1/18/2013
SI 1012	H	en	Counterweights and Rollers on Engine Models	1/9/2017
SI 1012	J	en	Counterweights and Rollers on Engine Models	10/20/2017
SI 1012	K	en	Counterweights and Rollers on Engine Models	1/7/2019
SI 1012	L	en	Counterweights and Rollers on Engine Models	4/8/2020
SI 1014	M	en	Lubricating Oil Recommendations	5/22/1995
SI 1014	N	en	Lubricating Oil Recommendations	7/29/2020
SI 1033		en	Replacement of Propeller Shaft Seal Rings	4/28/1961
SI 1037	M	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	7/8/2002
SI 1037	N	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	12/15/2009
SI 1037	P	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	6/11/2014
SI 1037	S	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	1/9/2017
SI 1037	T	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	9/22/2017
SI 1037	U	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	2/14/2018
SI 1037	V	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	2/13/2019
SI 1037	W	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	4/28/2020
SI 1037	Y	en	Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines	8/25/2021
SI 1042	AA	en	Approved Spark Plugs	2/17/2015
SI 1042	AB	en	Approved Spark Plugs	4/27/2016
SI 1042	AC	en	Approved Spark Plugs	1/10/2017
SI 1042	AD	en	Approved Spark Plugs	8/31/2017
SI 1042	AE	en	Approved Spark Plugs	10/2/2017
SI 1042	AF	en	Approved Spark Plugs	4/9/2018
SI 1042	AG	en	Approved Spark Plugs	1/7/2019
SI 1042	AH	en	Approved Spark Plugs	4/8/2020
SI 1042	W	en	Approved Spark Plugs	5/15/2000
SI 1042	X	en	Approved Spark Plugs	7/9/2002
SI 1042	Y	en	Approved Spark Plugs	9/1/2006
SI 1042	Z	en	Approved Spark Plugs	5/8/2009
SI 1043	A	en	Spark Plug Heli-Coil Insert Replacement	9/19/1969
SI 1047	B	en	Inspection and Reconditioning Procedures for Nitride Hardened Steel Cylinders	11/24/1967
SI 1059	C	en	Pre-Lubrication of Parts Before Assembly	5/19/1987
SI 1059	D	en	Pre-Lubrication of Parts Before Assembly	2/25/2011
SI 1059	E	en	Pre-Lubrication of Parts Before Assembly	1/27/2016
SI 1060		en	Push Rod Identification	7/20/1962
SI 1060	J	en	Push Rod Identification	3/10/2006
SI 1060	K	en	Push Rod Identification	6/21/2010
SI 1060	L	en	Push Rod Identification	5/3/2016
SI 1060	M	en	Push Rod Identification	2/1/2017
SI 1060	P	en	Push Rod Identification	8/31/2017
SI 1060	Q	en	Push Rod Identification	9/25/2017
SI 1060	R	en	Push Rod Identification	11/15/2017
SI 1060	S	en	Push Rod Identification	2/14/2018
SI 1060	T	en	Push Rod Identification	1/7/2019
SI 1060	U	en	Push Rod Identification	4/22/2020
SI 1068	A	en	Tappet Clearance	9/1/1978
SI 1068	A, Supp 1	en	Tappet Clearance	3/17/1997
SI 1070	aa	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	1/11/2019
SI 1070	AB	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	4/8/2020
SI 1070	C	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	4/23/1971
SI 1070	F	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	1/5/1973
SI 1070	M	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	3/7/2002
SI 1070	M, Supp 1	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	3/21/2002
SI 1070	M, Supp 2	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	9/28/2004
SI 1070	N	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	6/14/2006
SI 1070	P	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	4/18/2008
SI 1070	Q	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	7/16/2010
SI 1070	R	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	4/16/2012
SI 1070	S	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	4/24/2013
SI 1070	T	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	3/30/2016
SI 1070	U	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	1/30/2017
SI 1070	V	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	4/6/2017
SI 1070	W	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	8/10/2017
SI 1070	Y	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	10/12/2017
SI 1070	Z	en	Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models	4/4/2018
SI 1080	B	en	Maintenance Items for Special Attention	6/14/2006
SI 1080	C	en	Maintenance Items for Special Attention	6/15/2007
SI 1094	D	en	Fuel Mixture Leaning Procedures	3/25/1994
SI 1098	G	en	Propeller Flange Bushing Location	4/30/2001
SI 1098	H	en	Propeller Flange Bushing Location	3/8/2012
SI 1098	H, Supp 1	en	Propeller Flange Bushing Location	1/18/2013
SI 1098	J	en	Propeller Flange Bushing Location	4/4/2016
SI 1098	K	en	Propeller Flange Bushing Location	1/27/2017
SI 1098	L	en	Propeller Flange Bushing Location	8/24/2017
SI 1098	M	en	Propeller Flange Bushing Location	9/26/2017
SI 1098	N	en	Propeller Flange Bushing Location	2/14/2018
SI 1098	P	en	Propeller Flange Bushing Location	1/11/2019
SI 1098	Q	en	Propeller Flange Bushing Location	4/8/2020
SI 1105	B	en	Periodic Inspection of Generator/Alternator Mounting Brackets	5/5/2006
SI 1110	A	en	Replacement AC Fuel Pumps	3/14/1969
SI 1112	C	en	Repair of Fretted Crankcases	10/25/1968
SI 1112	D	en	Repair of Fretted Crankcases	3/28/1975
SI 1112	E	en	Repair of Fretted Crankcases	10/31/1988
SI 1123	A	en	Installation of Dowels and Rubber O-Ring Seals at Crankcase Thru-Stud Locations	12/1/1972
SI 1123	D	en	Installation of Dowels and Rubber O-Ring Seals at Crankcase Thru-Stud Locations	5/23/1997
SI 1125	C	en	Alternate Crankcase Parting Surface Sealants	8/4/2006
SI 1125	D	en	Alternate Crankcase Parting Surface Sealants	10/17/2008
SI 1129	C	en	Methods of Checking DC Alternator and Generator Belt Tension	3/27/2015
SI 1129	D	en	Methods of Checking DC Alternator and Generator Belt Tension	7/23/2015
SI 1132	B	en	Magneto Drop-Off	6/18/2010
SI 1141	A	en	Replacement of Worn Starter Ring Gears	5/9/2014
SI 1143	B, Supp 4	en	Counterweight Bushing Inspection, Replacement, and Special Tooling Upgrades	8/7/2009
SI 1143	C	en	Counterweight Bushing Inspection, Replacement, and Special Tooling Upgrades	11/10/2011
SI 1148	C	en	Use of Carburetor Heat Control	10/12/2007
SI 1154	F	en	FAA-Approved Starters and Alternators	2/24/1997
SI 1154	H	en	FAA-Approved Starters and Alternators	3/30/2000
SI 1154	J	en	FAA-Approved Starters and Alternators	3/21/2002
SI 1154	K	en	FAA-Approved Starters and Alternators	3/23/2004
SI 1154	K, Supp 1	en	FAA-Approved Starters and Alternators	7/15/2004
SI 1154	L	en	FAA-Approved Starters and Alternators	1/27/2006
SI 1154	M	en	FAA-Approved Starters and Alternators	5/26/2009
SI 1154	N	en	FAA-Approved Starters and Alternators	3/14/2011
SI 1154	P	en	FAA-Approved Starters and Alternators	3/8/2012
SI 1154	R	en	FAA-Approved Starters and Alternators	2/12/2014
SI 1154	S	en	FAA-Approved Starters and Alternators	3/30/2016
SI 1154	T	en	FAA-Approved Starters and Alternators	1/10/2017
SI 1154	U	en	FAA-Approved Starters and Alternators	4/9/2018
SI 1154	V	en	FAA-Approved Starters and Alternators	1/11/2019
SI 1154	W	en	FAA-Approved Starters and Alternators	4/16/2020
SI 1164	A	en	Oil Pump Application	11/25/1991
SI 1164	B	en	Oil Pump Application	4/12/2005
SI 1172	C	en	Adjustable Oil Pressure Relief Valve Installation and Valve Seat Repair or Replacement	1/28/1983
SI 1179	A	en	Crankshaft & Gear Assembly: Inspection & Repair	9/6/1968
SI 1187	C	en	Turbocharger Density Controller Adjustment
SI 1187	J	en	Turbocharger Density Controller Adjustment	5/23/1997
SI 1189		en	Malfunction of Slick Impulse Coupling Magneto	6/6/1968
SI 1191		en	Cylinder Compression	3/31/1972
SI 1191	A	en	Cylinder Compression	9/28/1998
SI 1192	A	en	Valve Spring Compressor No. ST266	9/29/2010
SI 1204	C	en	Exhaust Flange Gaskets	7/24/2009
SI 1204	D	en	Exhaust Flange Gaskets	8/26/2010
SI 1209	B	en	Crankshaft Flange Bolt Replacement	5/9/1980
SI 1210	B	en	Pinion Cage Attaching Nut Replacement	3/27/1981
SI 1221		en	Dry Air Pump Drive Oil Seal Replacement	8/29/1969
SI 1237	A	en	Prestolite Service Bulletins No. ASM-3 and ASM-4. Aircraft Charging System Service Precautions	5/7/1971
SI 1238	B	en	Assembly and Torque Procedures for V-Band Couplings	1/6/2010
SI 1241	C	en	Pre-Oiling Engine Prior to Initial Start	4/18/1997
SI 1246	B	en	Engine Conversion For Use of 100/130 or 100LL Grade Fuel	12/15/2009
SI 1256	F	en	Valve Guides For Service Use	4/5/2012
SI 1257	G	en	Horsepower, Manifold Pressure and RPM Values	5/16/2008
SI 1261		en	Sealing Oil Supply Ports	10/13/1972
SI 1267	B	en	Piston Pin Plug Usage	3/15/1985
SI 1267	C	en	Piston Pin Plug Usage	2/26/1999
SI 1267	D	en	Piston Pin Plug Usage	8/28/2009
SI 1272		en	Hardened Oil Pump Impeller	5/18/1973
SI 1275	C	en	Cleaning Fuel Injector Nozzles	9/23/2008
SI 1278		en	Starter Drive Lubrication	3/23/1973
SI 1279	C	en	Oil Sump Baffle Replacement	5/8/2012
SI 1279	D	en	Oil Sump Baffle Replacement	5/15/2019
SI 1280	D	en	Rotator Type Intake Valves	7/20/2021
SI 1285	C	en	Non-Destructive Testing of Lycoming Engine Parts	7/20/2007
SI 1285	D	en	Non-Destructive Testing of Lycoming Engine Parts	2/23/2012
SI 1285	D, Supp 1	en	Non-Destructive Testing of Lycoming Engine Parts	1/28/2014
SI 1285	E	en	Non-Destructive Testing of Lycoming Engine Parts	1/30/2015
SI 1285	F	en	Non-Destructive Testing of Lycoming Engine Parts	7/18/2017
SI 1290	F	en	Repair of Oil Leakage at Crankcase Thru-Stud Locations; Assembled and Unassembled Engines	7/24/2009
SI 1291		en	Ignition System for High Altitude Operation	11/2/1973
SI 1299	B	en	Magneto Drive Gear and Cushion Modification	9/24/2010
SI 1304	J	en	Engine Nameplate Replacement	11/12/1999
SI 1308	E	en	Pressurized Magneto Pressure Test	2/2/2007
SI 1308	E, Supp 1	en	Pressurized Magneto Pressure Test	3/16/2007
SI 1316	A	en	Repair of Oil Cooler By-Pass Valve Seat	4/25/1986
SI 1320		en	Tightening Procedure for Exhaust Manifold Components	3/7/1975
SI 1324	B	en	Crankshaft Oil Seals	10/30/2006
SI 1324	C	en	Crankshaft Oil Seals	5/26/2009
SI 1324	D	en	Crankshaft Oil Seals	1/25/2023
SI 1325		en	Timing Change for 10-360 Series Engines	10/3/1975
SI 1340	A	en	Piston Pin Identification	5/25/2006
SI 1341		en	Oil Pump Idler Shaft Lubrication	7/30/1976
SI 1343	B	en	Set Screw for Propeller Governor Idler Shaft	6/15/2007
SI 1343	C	en	Set Screw for Propeller Governor Idler Shaft	3/10/2016
SI 1369		en	Vacuum Pump Pad Oil Supply Port	10/6/1978
SI 1374	B	en	Slick Magnetos	10/16/1991
SI 1380		en	Engine Mounting Bracket Attachment Nuts or Bolts	6/22/1979
SI 1388	C	en	Trouble Shooting of the O-235 Series Engines	9/25/1981
SI 1391		en	Exhaust Manifold Tube Alignment	10/5/1979
SI 1397	A	en	Overflow Oil from Breather Fitting of Inverted Oil System	6/1/2016
SI 1406	B	en	Crankcase Parts for Use with Large-Diameter Hydraulic Lifters	8/26/1983
SI 1406	C	en	Crankcase Parts for Use with Large-Diameter Hydraulic Lifters	8/2/2011
SI 1406	D	en	Crankcase Parts for Use with Large-Diameter Hydraulic Lifters	10/4/2012
SI 1406	E	en	Crankcase Parts for Use with Large-Diameter Hydraulic Lifters	9/9/2014
SI 1408	B	en	Engine Mount Bracket Replacement	3/19/2013
SI 1408	C	en	Engine Mount Bracket Replacement	6/17/2016
SI 1409	A, Supp 1	en	Lycoming Engines P/N LW-16702, Oil Additive	11/12/1993
SI 1409	C	en	Lycoming Engines P/N LW-16702, Oil Additive	2/20/2009
SI 1414	B	en	Bendix Service Bulletin No. RS77, Rev. 2	2/27/2012
SI 1415	A	en	New Turbocharger Mounting Hardware	3/21/2019
SI 1420	A	en	Fuel Pump Drive Spline Lubrication	2/25/2011
SI 1424	A	en	Installation Procedure for P/N 15B26066 Hydraulic Tappet/Plunger Assemblies	12/15/2009
SI 1425	A	en	Suggested Maintenance Procedures to Reduce the Possibility of Valve Sticking	1/19/1988
SI 1427	B	en	Lycoming Reciprocating Engine Break-In and Oil Consumption	2/8/1993
SI 1427	C	en	Lycoming Reciprocating Engine Break-In and Oil Consumption	12/29/2010
SI 1435		en	Conversion from Constant Speed to Fixed Pitch Propeller and Vice Versa. Propeller Governor Oil Line Nut and Elbow	4/25/1986
SI 1436	A	en	Adapter Kit for Magneto Isolation Drive	9/29/2010
SI 1437		en	Engine Timing Marks	8/15/1986
SI 1438	A	en	Propeller Governor Pad Plate P/N LW-12347	12/9/2005
SI 1442	A	en	Improved Oil Filter Bypass Valve	3/28/2011
SI 1443	A	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	9/15/1991
SI 1443	E	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	5/19/2000
SI 1443	F	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	8/4/2006
SI 1443	G	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	12/15/2009
SI 1443	H	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	2/7/2012
SI 1443	H, Supp 1	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	10/12/2012
SI 1443	J	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	2/17/2015
SI 1443	K	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	10/30/2015
SI 1443	L	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	4/27/2016
SI 1443	M	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	1/10/2017
SI 1443	N	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	8/9/2017
SI 1443	P	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	10/12/2017
SI 1443	Q	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	4/9/2018
SI 1443	R	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	4/16/2020
SI 1443	S	en	Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines	12/8/2022
SI 1446		en	Possible Ruptured Pressure Regulator Diaphragm in a Fuel Pump	8/9/1989
SI 1449		en	Installation of Rotormaster Turbocharger (46A21184)	3/23/1990
SI 1453		en	Procedure to Replace Oil Filter Converter Plate Gasket	5/9/1991
SI 1453	A	en	Procedure to Replace Oil Filter Converter Plate Gasket	6/30/2003
SI 1453	B	en	Procedure to Replace Oil Filter Converter Plate Gasket	9/24/2010
SI 1454	A	en	Rocker Arm Assembly Replacement Part	2/25/2011
SI 1454	A, Supp 1	en	Rocker Arm Assembly Replacement Part	3/19/2013
SI 1457	A	en	Optional Remote-Mounted Oil Filter Kits	2/1/2012
SI 1458	B	en	Connecting Rod Bolts (Identification and Installation)	3/6/2001
SI 1458	C	en	Connecting Rod Bolts (Identification and Installation)	2/3/2006
SI 1458	D	en	Connecting Rod Bolts (Identification and Installation)	4/20/2007
SI 1458	E	en	Connecting Rod Bolts (Identification and Installation)	7/24/2008
SI 1458	F	en	Connecting Rod Bolts (Identification and Installation)	3/6/2012
SI 1458	G	en	Connecting Rod Bolts (Identification and Installation)	11/10/2015
SI 1462	A	en	Propeller Oil Control Leak Test Procedure (With Propeller Installed on Engine)	7/10/2003
SI 1472		en	Removal of Preservative Oil From Engine	8/12/1994
SI 1480		en	Installation of Steel Push Rods	3/17/1997
SI 1481		en	Factory Engine Preservation	4/18/1997
SI 1481	A	en	Factory Engine Preservation	2/23/2007
SI 1481	B	en	Factory Engine Preservation	2/8/2008
SI 1483	A	en	Valve Leak Check with Engine Cylinder Removed (Field Procedure)	12/21/2010
SI 1484	A	en	Installation Torque for Fuel Metering Device, Carburetor, Fuel Injector Servo or "AN" Fuel Pump Hold Down Nuts	9/21/2007
SI 1484	B	en	Installation Torque for Fuel Metering Device, Carburetor, Fuel Injector Servo or "AN" Fuel Pump Hold Down Nuts	11/18/2010
SI 1484	C	en	Installation Torque for Fuel Metering Device, Carburetor, Fuel Injector Servo or "AN" Fuel Pump Hold Down Nuts	3/29/2011
SI 1485	A	en	Exhaust Valve and Guide Identification Procedure	7/2/2003
SI 1486		en	Fuel Injector and Flow Divider Replacement	10/28/1998
SI 1489	A	en	Fuel Manifold Spring Change	6/11/2002
SI 1489	B	en	Fuel Manifold Spring Change	10/27/2003
SI 1489	C	en	Fuel Manifold Spring Change	3/9/2011
SI 1491		en	Fuel Injector Check	1/21/1999
SI 1492	A	en	Piston Pin Plug Wear Inspection	12/30/1998
SI 1492	B	en	Piston Pin Plug Wear Inspection	2/26/1999
SI 1492	C	en	Piston Pin Plug Wear Inspection	7/14/2000
SI 1492	D	en	Piston Pin Plug Wear Inspection	3/20/2009
SI 1497	A	en	Engine Procedures for Flight Training Operations	4/12/2011
SI 1498	A	en	Recommended Engine Procedures for Purge of Vapor During Ground Operations	4/13/2011
SI 1498	B	en	Recommended Engine Procedures for Purge of Vapor During Ground Operations	1/7/2019
SI 1500		en	Counterweight Roller Change for Robinson Helicopter	1/11/2001
SI 1502	A	en	Installation of Inverter Flow Divider	12/19/2000
SI 1503		en	Accessory Drive Gear and Shaft Dowel Replacement	12/20/2000
SI 1504		en	Cylinder Assembly Replacement on O-235 Engines Operated Under DGAC Authority	1/26/2001
SI 1505		en	Cold Weather Starting	7/1/2002
SI 1506		en	Replacement of Impulse Coupling Magnetos on Four-Cylinder Engines	4/20/2001
SI 1506	A	en	Replacement of Impulse Coupling Magnetos on Four-Cylinder Engines	6/28/2016
SI 1508		en	Dual Magneto Attachment	4/17/2002
SI 1508	A	en	Dual Magneto Attachment	8/15/2003
SI 1508	B	en	Dual Magneto Attachment	12/19/2007
SI 1508	C	en	Dual Magneto Attachment	2/10/2011
SI 1509		en	Replacement of All P/N STD-1409 Nuts with P/N STD-2249 Nuts	4/25/2003
SI 1510		en	Adapter Kit for Magneto Isolation Drive	4/30/2003
SI 1510	A	en	Adapter Kit for Magneto Isolation Drive	4/22/2004
SI 1511	A	en	Inspection of "PID" Stamped Crankshafts	5/26/2005
SI 1512		en	Main and Connecting Rod Bearing Upgrade	9/23/2004
SI 1512	Supp 1	en	Main and Connecting Rod Bearing Upgrade	8/28/2009
SI 1513		en	Reprint of Lamar Service Information Letter No. LSI-009	9/23/2004
SI 1514		en	Roller Tappets Part Information Update	3/10/2006
SI 1514	A	en	Roller Tappets Part Information Update	7/18/2008
SI 1514	B	en	Roller Tappets Part Information Update	2/23/2011
SI 1514	C	en	Roller Tappets Part Information Update	10/13/2016
SI 1514	D	en	Roller Tappets Part Information Update	2/5/2018
SI 1517		en	Timing Change for TIO-540-AK1A Series Engines	10/27/2006
SI 1518		en	Reprint of Precision Service Information Letter No. SIL RS-84	3/14/2008
SI 1519		en	Reprint of Precision Service Information Letter No. SIL RS-87 Revision 1	5/30/2008
SI 1519	A	en	Reprint of Precision Service Information Letter No. SIL RS-87 Revision 1	9/19/2008
SI 1520		en	Reprint of Precision Service Information Letter No. SIL RS88	8/22/2008
SI 1521		en	Reprint of Precision Service Information Letter No. SIL RS-35 Revision 1	11/19/2008
SI 1522		en	Reprint of Precision Service Information Letter No. SIL RS-62 Revision 2	11/19/2008
SI 1523		en	Lycoming Engines Carburetor Manufacturer Cross-References	6/16/2009
SI 1523	A	en	Lycoming Engines Carburetor Manufacturer Cross-References	11/20/2009
SI 1523	B	en	Lycoming Engines Carburetor Manufacturer Cross-References	4/15/2013
SI 1523	C	en	Lycoming Engines Carburetor Manufacturer Cross-References	11/15/2013
SI 1523	D	en	Lycoming Engines Carburetor Manufacturer Cross-References	1/6/2015
SI 1523	E	en	Lycoming Engines Carburetor Manufacturer Cross-References	9/16/2015
SI 1523	F	en	Lycoming Engines Carburetor Manufacturer Cross-References	12/14/2015
SI 1523	G	en	Lycoming Engines Carburetor Manufacturer Cross-References	3/16/2016
SI 1524		en	Alternator Bracket Kit for 130A Alternators	2/23/2009
SI 1525		en	Reprint of Precision Service Information Letter No. SIL RS-92	1/16/2009
SI 1526		en	New Piston Part Numbers	8/25/2010
SI 1526	A	en	New Piston Part Numbers	9/24/2010
SI 1526	B	en	New Piston Part Numbers	11/4/2011
SI 1526	C	en	New Piston Part Numbers	1/18/2012
SI 1526	D	en	New Piston Part Numbers	3/29/2012
SI 1526	E	en	New Piston Part Numbers	5/18/2012
SI 1526	F	en	New Piston Part Numbers	5/5/2015
SI 1526	G	en	New Piston Part Numbers	7/24/2015
SI 1528		en	Aircraft Engine Starter Recommendations	12/15/2009
SI 1529		en	Hydraulic Lifter and Tappet Body Part Numbers	11/20/2009
SI 1529	A	en	Hydraulic Lifter and Tappet Body Part Numbers	6/30/2010
SI 1529	B	en	Hydraulic Lifter and Tappet Body Part Numbers	2/23/2012
SI 1529	C	en	Hydraulic Lifter and Tappet Body Part Numbers	7/16/2012
SI 1530		en	Engine Inspection in Particulate-Laden Environments (Volcanic Ash, Sand, Dust, Airborne Debris)	2/4/2011
SI 1531		en	Alternator Bracket for Engines Equipped with Kelly Aerospace E-Drive Starters	6/11/2010
SI 1532		en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	5/25/2012
SI 1532	A	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	2/6/2013
SI 1532	B	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	4/8/2013
SI 1532	C	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	3/5/2014
SI 1532	D	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	9/9/2014
SI 1532	E	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	11/26/2014
SI 1532	F	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	4/11/2016
SI 1532	G	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	1/10/2017
SI 1532	H	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	8/14/2017
SI 1532	J	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	10/12/2017
SI 1532	K	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	4/16/2018
SI 1532	L	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	4/16/2020
SI 1532	M	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	11/19/2021
SI 1532	N	en	Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines	12/13/2023
SI 1533		en	Approved Rotary Vane Fuel Pumps	9/24/2010
SI 1533	A	en	Approved Rotary Vane Fuel Pumps	5/5/2015
SI 1533	B	en	Approved Rotary Vane Fuel Pumps	7/29/2015
SI 1533	C	en	Approved Rotary Vane Fuel Pumps	9/3/2015
SI 1533	D	en	Approved Rotary Vane Fuel Pumps	1/11/2019
SI 1533	E	en	Approved Rotary Vane Fuel Pumps	4/7/2022
SI 1534		en	Service Recommendations for Long-Term Storage of Engines that Use Automotive Fuel	1/27/2011
SI 1535		en	Counterweight and Roller Removal, Inspection, and Installation	10/31/2011
SI 1535	Supp 1	en	Counterweight and Roller Removal, Inspection, and Installation	12/13/2011
SI 1539		en	Fuel Manifold Spring Change	2/4/2011
SI 1543		en	Notification of Approved Tappet P/N 15B26262	2/23/2012
SI 1545		en	Expanded Clearance in Crankcase Nose	10/2/2012
SI 1546		en	Specific Requirements for Installation and Removal of Electrical Lead on Hartzell Engine Technologies, LLC (Previously Kelly Aerospace) Starters	10/4/2012
SI 1549		en	Notification of Approved Fuel Pump Plunger P/N 23D26777	6/27/2012
SI 1553		en	Additional Cylinder Fin Stabilizer	3/26/2013
SI 1554		en	Zip Strap Replacement	5/7/2014
SI 1558		en	New Piston Ring Part Numbers	3/21/2014
SI 1559		en	Adjusting Fuel Pressure on AN-Drive Type Fuel Pumps	11/26/2014
SI 1560		en	Propeller Governor Drive Set Screw Inspection	3/10/2016
SI 1562		en	Turbocharged Exhaust System Installation	6/5/2014
SI 1565	A	en	Replacement Thermostatic Oil Cooler Bypass Valves	5/4/2017
SI 1566		en	Lycoming Engines Approves the Use of Safety Cable	3/10/2016
SI 1569	A	en	Installation, Operation, and Maintenance of Lycoming Electronic Ignition System (EIS)	9/2/2020
SI 1569	B	en	Installation, Operation, and Maintenance of Lycoming Electronic Ignition System (EIS)	4/21/2021
SI 1570		en	Alternate Oil Sump Fitting Configuration for Aerobatic Inverted Oil System	12/12/2017
SI 1570	A	en	Alternate Oil Sump Fitting Configuration for Aerobatic Inverted Oil System	8/3/2018
SI 1571		en	Lockplate Installation for Induction Housing on TIO-540-AJ1A and IO-540-AC1A5	8/23/2018
SI 1572		en	Plug Replacement of Vapor Return Fitting on Piper Installation of IO-360-B4A	8/3/2018
SI 1573		en	Lycoming TEO-540 Engine Series Approved Engine Configurations	1/11/2019
SI 1573	A	en	Lycoming TEO-540 Engine Series Approved Engine Configurations	5/23/2019
SI 1573	B	en	Lycoming TEO-540 Engine Series Approved Engine Configurations	2/7/2020
SI 1573	C	en	Lycoming TEO-540 Engine Series Approved Engine Configurations	6/14/2021
SI 1573	D	en	Lycoming TEO-540 Engine Series Approved Engine Configurations	7/30/2021
SI 1573	E	en	Lycoming TEO-540 Engine Series Approved Engine Configurations	11/22/2021
SI 1575		en	New Connecting Rod Bushing	3/11/2020
SI 1577		en	Intake Valve In-Service Data	11/10/2020
SI 1577	A	en	Intake Valve In-Service Data	1/25/2023
SI 1579		en	Exhaust System Replacement Components	11/20/2020
SI 1582		en	Fuel Injector Replacement	6/14/2021
SI 1582	A	en	Fuel Injector Replacement	11/22/2021
SI 1583		en	Front Expansion Plug Replacement	5/18/2022
SI 1585		en	Oil Cooler Bypass Valve Assembly Replacement	11/19/2021
SI 1585	A	en	Oil Cooler Bypass Valve Assembly Replacement	12/1/2023
SI 1586		en	Oil Filter Base Bypass Spring Replacement	12/2/2021
SI 1587		en	Reprint of AVStar Service Information Letter No. AFS-SIL-03	2/3/2022
SI 1588		en	Rocker Box Cover Screws Torque Values and Torque Sequence	2/14/2024
SI 1589		en	Exhaust Bypass Valve Assembly Replacement	12/1/2023
SI 1592		en	Set up and Adjustment of Fuel Control. Installation of the Throttle Position Sensor (TPS) and Mixture Position Sensor (MPS)	10/3/2024
SI 1593		en	Incorrectly Marked Alternator Belts	5/12/2025

Service Letters
Name	Revision	Lang	Subject	Date
SL 047		en	Rear Bearing Support Housing Clogging Inspection	10/10/1986
SL L114	AG	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	11/4/1994
SL L114	AK	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	8/25/2000
SL L114	AL	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	2/27/2003
SL L114	AM	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	1/6/2005
SL L114	AN	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	2/3/2006
SL L114	AP	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	7/20/2007
SL L114	AQ	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	8/22/2008
SL L114	AR	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	2/27/2009
SL L114	AR, Supp 1	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	7/31/2009
SL L114	AS	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	3/26/2010
SL L114	AT	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	2/8/2011
SL L114	AU	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	2/23/2012
SL L114	AU, Supp 1	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	4/19/2012
SL L114	AU, Supp 2	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	8/7/2012
SL L114	AV	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	3/19/2013
SL L114	AV, Supp 1	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	9/30/2013
SL L114	AW	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	1/23/2014
SL L114	AY	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	9/24/2015
SL L114	AZ	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	12/17/2015
SL L114	BA	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	6/29/2016
SL L114	BC	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	2/16/2017
SL L114	BD	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	9/1/2017
SL L114	BE	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	9/27/2017
SL L114	BF	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	4/26/2018
SL L114	BG	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	2/13/2019
SL L114	BH	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	4/13/2020
SL L114	BJ	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	10/5/2021
SL L114	BK	en	Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)	12/14/2023
SL L126		en	Conversion to Low Compression Engine	1/29/1960
SL L162	B	en	Heli-Coil Service Repair Kit	1/29/1982
SL L163	C	en	Recommendations Regarding Accidental Engine Stoppage, Propeller Strike, Loss of Propeller Blade or Tip	5/20/1991
SL L171		en	General Aspects of Spectrometric Oil Analysis	11/26/1971
SL L173	C	en	Slick Aircraft Products Service Bulletin No. SB2-80C	3/10/2006
SL L180		en	Engine Preservation for Active and Stored Aircraft	1/4/1974
SL L180	B	en	Engine Preservation for Active and Stored Aircraft	11/13/2001
SL L185	B	en	The Use of Higher Octane Aviation Fuel for Engines Rated for 80/87 Octane Fuel	1/19/1988
SL L192	B	en	Spark Plug Fouling	1/19/1988
SL L197	A	en	Recommendations to Avoid Valve Sticking	1/19/1988
SL L199		en	Recommendations Regarding USE OF FUEL	1/28/1983
SL L213	A	en	Time Between Overhaul (TBO) Extension Kit	4/10/1987
SL L220	C	en	Wide Deck Cylinder Configuration on Lycoming Engines	8/2/2011
SL L221	B	en	Warranty Repair of Precision Airmotive Corporation Fuel Control Products	6/21/2001
SL L221	C	en	Warranty Repair of Precision Airmotive Corporation Fuel Control Products	6/15/2007
SL L230	B	en	Lycoming Publications Available on Microfiche	8/4/2006
SL L234	A	en	Tool Rental Program	7/10/2002
SL L234	B	en	Tool Rental Program	6/15/2007
SL L240		en	Part Numbers Identified by Lycoming with -70 or -85 Suffix	5/15/2003
SL L240	A	en	Part Numbers Identified by Lycoming with -70 or -85 Suffix	5/27/2009
SL L242		en	Improved Lower Idle Valve in Fuel Injectors	1/6/2005
SL L244		en	Revision to Appendix 1 in Service Bulletin No. 569	3/27/2006
SL L245		en	Special Service Publication No. SSP567, "Camshaft Regrinding"	11/2/2007
SL L247		en	Shelf Life Requirements	5/21/2010
SL L247	A	en	Shelf Life Requirements	5/15/2012
SL L247	A, Supp 1	en	Shelf Life Requirements	8/31/2012
SL L247	B	en	Shelf Life Requirements	11/18/2013
SL L247	C	en	Shelf Life Requirements	2/28/2014
SL L247	D	en	Shelf Life Requirements	7/27/2015
SL L247	E	en	Shelf Life Requirements	3/2/2016
SL L247	F	en	Shelf Life Requirements	7/20/2016
SL L247	G	en	Shelf Life Requirements	11/23/2016
SL L247	H	en	Shelf Life Requirements	7/24/2017
SL L247	J	en	Shelf Life Requirements	8/23/2018
SL L248		en	O-235 Crankcase Design Upgrade	1/14/2011
SL L249		en	Interim Alternative to Address the Discontinuation of Teledyne Dual Magnetos	10/6/2010
SL L250		en	Lycoming Engines Exchange Engine Core Policy	11/23/2010
SL L250	A	en	Lycoming Engines Exchange Engine Core Policy	7/29/2011
SL L251		en	Connecting Rod Bolt Marking	11/23/2010
SL L253		en	Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products	1/22/2013
SL L253	A	en	Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products	8/27/2013
SL L253	B	en	Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products	2/28/2014
SL L253	C	en	Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products	4/16/2018
SL L254		en	Lycoming Model Designation for All Carburetors	4/15/2013
SL L255		en	Approved Diaphragm-Type Fuel Pumps	4/26/2013
SL L255	A	en	Approved Diaphragm-Type Fuel Pumps	5/3/2016
SL L258		en	Part Number Supersedure for External Retaining Ring	8/27/2013
SL L259		en	Product Improvements on Lycoming Carburetor P/N 61C26051	1/23/2014
SL L261		en	Alternate Carburetor	4/23/2014
SL L261	A	en	Alternate Carburetor	11/11/2015
SL L262		en	New Piston Ring Part Numbers	12/31/2014
SL L263		en	Discolored Paint on Cylinder	3/11/2015
SL L264		en	Engine Start Problems Due to Drift in Magneto-to-Engine Timing. Reprint of Champion Slick Magneto Service Letter 4300/6300-74-20-001, dated February 18, 2015	3/17/2015
SL L264	A	en	Engine Start Problems Due to Drift in Magneto-to-Engine Timing. Reprint of Champion Slick Magneto Service Letter 4300/6300-74-20-001, dated February 18, 2015	1/27/2016
SL L267		en	Warranty and Owner Registration via Lycoming Engines Website	2/16/2017
SL L267	A	en	Warranty and Owner Registration via Lycoming Engines Website	3/21/2024
SL L270		en	Extended Maintenance Intervals for Spark-Ignited Engines Operated on Unleaded Fuels	4/5/2017
SL L271		en	How to Access Lycoming Digital Technical Publications	2/16/2017
SL L272		en	Release of New Silicone Rocker Cover Gaskets	7/17/2017
SL L272	A	en	Release of New Silicone Rocker Cover Gaskets	11/21/2017
SL L272	B	en	Release of New Silicone Rocker Cover Gaskets	2/14/2024
SL L273		en	Service Bulletin No. 632 Customer Care Program	1/5/2018
SL L275		en	Warranty Procedure for Exhaust System Replacement Referenced in the Most Current Revision of SB627	4/10/2018
SL L275	A	en	Warranty Procedure for Exhaust System Replacement Referenced in the Most Current Revision of SB627	5/17/2018
SL L277		en	Hartzell Engine Technologies and Lycoming Engines Alternator Distribution Agreement	12/17/2019
SL L278		en	Lycoming Engines Product Support Hours	7/12/2019
SL L279		en	Lycoming Model Designation for Fuel Injectors	10/10/2019
SL L279	A	en	Lycoming Model Designation for Fuel Injectors	12/28/2023
SL L282		en	Australian Fuel Testing	12/11/2020
SL L283		en	Alternate Ignition System	2/19/2021
SL L284		en	Blemish on Cylinder Barrel	3/17/2021
SL L285		en	Change in Cylinder Configuration for O-235-C, -E, and -H Series Engines	8/25/2021
SL L287		en	Increased Fuel Economy and Improved Manifold Pressure Stability	8/12/2021
SL L288		en	Alternate Bolt Locking of Wastegate Solenoid Valve	12/16/2021
SL L289		en	Valve Spring Part Numbers	3/2/2022
SL L293		en	Air Temperature Sensor P/N 60C28409	11/9/2023
SL L296		en	Electronic Ignition System (EIS) Kits Discontinued	6/13/2025

Special Advisories
Name	Lang	Subject	Date
SA 59-800	en	Connecting Rod Bearing Replacement on TIO-540-AE2A Model Engines	8/31/2000
SA 66-801	en	Turbocharger Mounting Bracket Bolt Inspection/Replacement	8/17/2001
SA 94-508	en	Reprint of Unison Industries Mandatory Service Bulletin Nos. SB2-08 and SB3-08	5/15/2008
SA 95-508	en	Reprint of Unison Industries Mandatory Service Bulletin No. SB308	5/21/2008
SA 123-1013	en	Low RPM Engine Surge	11/6/2013
SA 143	en	Mandatory AVStar Billet-Type Carburetor P/N 61C26127	12/18/2014
SA 203	en	Hartzell Engine Tech (HET) Service Bulletin (SB) No. 203	9/14/2023

User Manuals
Name	Revision	Lang	Subject	Date
UM SSP-122		en	Field Service Tool & Troubleshooting: TEO-540 Series	7/31/2022

Miscellaneous
Name	Revision	Lang	Subject	Date
Customer Letter		en	Replacement of Certain Crankshafts on Engines	11/30/2005
HPC		en	Handbook of Instructions with Parts Catalog: O-145 and GO-145	7/31/1945
Key, Part 1		en	A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
Key, Part 2		en	A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
Key, Part 3		en	A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
Key, Part 4		en	A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
Key, Part 5		en	A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
N/A		en	Some Tips on O-235 Engine
N/A		en	Some Tips on O-235 Engine
ORM 60297-29		en	Operation Reference Manual: IO-390 Series
SSP-108		en	Certificated Aircraft Engines	11/30/2008
SSP-110		en	Certificated Aircraft Engines	5/31/2010
SSP-110	1	en	Certificated Aircraft Engines	11/30/2013
SSP-110	2	en	Certificated Aircraft Engines	4/30/2020
SSP-122	1	en	Field Service Tool User Manual & Troubleshooting Guide	8/31/2023
SSP-124		en	Operating Recommendations for TEO-540-C1A Engine in Tecnam P2012 Traveller	2/29/2024
SSP-384		en	Special Servie Tools	12/31/1984
SSP-384, 2nd Ed		en	Special Servie Tools	2/28/2010
SSP-400		en	Operating Recommendations for TIO-540-AE2A Engine in New Piper Aircraft Malibu Mirage
SSP-400	1	en	Operating Recommendations for TIO-540-AE2A Engine in New Piper Aircraft Malibu Mirage
SSP-400	2	en	Operating Recommendations for TIO-540-AE2A Engine in New Piper Aircraft Malibu Mirage	12/31/2008
SSP-475		en	Reciprocating Engine Troubleshooting Guide	11/30/2005
SSP-500		en	Maintenance Procedure for the Inspection of Oil Filter and Suction Screen
SSP-700	A	en	"Experts" Are Everywhere to Help You
SSP-875	1	en	Labor Allowance Guidebook - Reciprocating Aircraft Engines	4/30/2000
SSP-875	2	en	Labor Allowance Guidebook - Reciprocating Aircraft Engines	1/31/2024
SSP-885	1	en	Engine Mounted Oil Filter Kits and Replacement Filters	1/31/1988
SSP-885	2	en	Engine Mounted Oil Filter Kits and Replacement Filters
SSP-1776	3	en	Service Table of Limits and Torque Value Recommendations	1/31/2017
SSP-1776	4	en	Service Table of Limits and Torque Value Recommendations	4/10/2018
SSP-1776	5	en	Service Table of Limits and Torque Value Recommendations	4/13/2020
Volcanic Ash		en	General Operating and Maintenance Recommendations for Lycoming Engines in Environments Laden with Volcanic Ash

Subscriber Access

Other Services

Free Features

Learn More

Legalese

For Pilots

Service Information: Textron Lycoming

Alternative Names: (Avco Lycoming, Lycoming Engines)

Table of Contents