The Aviation DataBase: Service Information: Textron Lycoming
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Illustrated Parts Catalogs
NameRevisionLangSubjectDate
B en O-290-D Series4/30/1991
en O-320, IO-320 and LIO-320 Series1/31/1976
en 0, 10, HO, H10-360
en VO-360 Series and IVO-360-A1A Helicopter
en VO-435 and TVO-435 Series9/30/1972
en GO-480-B, -D and F6 Series
2 en GSO-480 and IGSO-480 Series9/30/1980
A en O-540-A Series Standard Cylinder Flange Crankcase9/30/1991
en O-540-B, -E & -G Series7/31/2009
en VO-54D-Series and TIVO-54D-A2A Helicopter10/31/1973
en IO-720-D1C Wide Cylinder Flange10/31/1977
1 en IO-720-D1C Wide Cylinder Flange
1 en TIO-541 Series12/31/1981
en TIGO-541 Series10/31/1975
en O-320-H 76 Series12/31/2012
en 76 Series & O-360, LO-360 Series
1 en TO, LTO-360 76 Series4/30/1985
en O-320-A2B, -A3B Series7/31/2011
en O-320-A2C, -A2D Series8/31/2011
en O-320-E1A, -E2A Series10/31/2011
en O-320-E2B, -E2C Series11/30/2011
en O-320-E2D, -E3D Series9/30/2011
en O-320-E2G Series11/30/2011
en O-320-E2H, -E3H Series11/30/2011
A en O-320-B and D Series High Compression, Wide Cylinder Flange11/30/1985
en O-320-D3G Series7/31/2012
A en IO-540-A, B, C, D, E and G Series Standard Cylinder Flange Crankcase7/31/2010
en IO-540-J, K, M, N, P and R Series Standard Cylinder Flange Crankcase5/31/1993
B en O-235 Series12/31/1986
en O-235-P2A
en O-235-L2A, -L2C Series11/30/2012
B en O-360-A Wide Cylinder Flange6/30/1980
B reprint en O-360-A Wide Cylinder Flange8/1/1991
B en O, LO, TO, -360 Series Wide Cylinder Flange5/31/2010
en O-360-A4N Series4/30/2011
en O-360-C1G Series3/31/2011
en (L)O-360-A1H6 Series5/31/2011
en O-360-A1P Series5/31/2011
en O-360-B2C Series7/31/2011
en O-360-C4F and -C4P Wide Cylinder Flange Crankcase
en O-360-A4P Wide Cylinder Flange Crankcase
en HO-360-C1A Wide Cylinder Flange Crankcase
A en O-360-J2A Wide Cylinder Flange Crankcase8/31/1998
en IO-360-B1G6 Wide Cylinder Flange Crankcase
en IO360M1B Series12/31/2010
en IVO-360-A1A Series Wide Cylinder Flange Crankcase7/31/2010
en O-360-A4M Series10/31/2012
B en TIO/LTIO-540-U2A Series Wide Cylinder Flange12/31/2008
A en TIO/LTIO-540-V2AD Wide Cylinder Flange6/30/1986
en TIO-540-AB1AD Wide Cylinder Flange4/30/1985
2nd Ed en TIO-540-AA1AD Wide Cylinder Flange Crankcase12/31/2010
E en TIO-LTIO-540 Series Wide Cylinder Flange Crankcase8/31/2010
2 en TIO-540-AE2A11/30/2013
A en TIO-540-AF1A, -AF1B Wide Cylinder Flange Crankcase1/31/1995
en TIO-540 AG1A Wide Cylinder Flange Crankcase
en TIO-540-AH1A Series5/31/2011
A en TIO-540 W2A Wide Cylinder Flange Crankcase12/31/2009
A en TIO-540 AK1A11/30/2002
en IO, AIO-360-A, -B Series Wide Cylinder Flange1/31/1995
E en IO/LIO-360-C, -J, HIO, TIO, AEIO-360 Series Wide Cylinder Flange2/28/2009
C en TIO-360-C1A6D Wide Cylinder Flange12/31/2009
en AEIO-360-BB -B1F & -B1H11/30/2005
en AEIO-360-H1B8/31/2003
en HIO-360-G1A1/31/2003
en IO360L2A Series3/31/2012
en YIO-390-B Series10/31/2009
en O-540-F1B5 Wide Cylinder Flange Crankcase9/30/2009
en O-540-A4D51/31/2003
en O-540-H2A510/31/2005
en O540A4E5 Series3/31/2012
en IO-540 Wide Cylinder Flange12/31/1991
en IO-540-C4D5D Wide Cylinder Flange6/30/1982
en IO-540-V Series2/28/2011
en IO-540-W Series Wide Cylinder Flange Crankcase9/30/1993
en AEIO-540-L1B5D Wide Cylinder Flange
en IO-540-T Series (-T4A5D, -T4B5, T4B5D, T4C5D) Series Wide Cylinder Flange Crankcase9/30/1992
en AEIO-540-D Series (-D4A5, -D4B5) Wide Cylinder Flange Crankcase8/31/2001
en IO-540-AC1A5 Wide Series Flange Crankcase10/31/2008
B en I0-540-AF1A512/31/2009
en IO-540-AE1A5 Series7/31/2013
en IO-540-AG1A5 Series11/30/2012
en IO-540-K1A5 Series1/31/2015
en IO-580-B1A2/28/2003
1 en YTEO-540-B1A7/11/2014
en AEIO-360-B1F6/1/2025
en AEIO-390-A Series7/31/2016
1 en AEIO-390-A Series6/1/2026
en IO-360-C1G66/30/2016
en IO-360-L2A6/1/2025
en IO-360-N1A1/31/2016
en IO-360-P1A6/30/2017
en IO-390-A Series6/30/2016
1 en IO-390-A Series6/1/2025
en IO-390-C Series2/1/2017
1 en IO-390-C Series6/1/2025
en IO-390-D Series3/31/2020
1 en IO-390-D Series6/1/2025
en IO-540-AB1A512/31/2015
en IO-540-D4B5 Series3/31/2015
en LIO-360-B1G66/30/2017
en (L)IO-360-M1A1/31/2016
en (L)TO-360-E1A6D6/1/2025
en O-320-B1A4/30/2016
en O-320-D2J10/21/2016
en TEO-540-C1A12/31/2018
1 en TEO-540-C1A4/30/2019
2 en TEO-540-C1A5/31/2021
3 en TEO-540-C1A7/31/2021
4 en TEO-540-C1A10/31/2021
5 en TEO-540-C1A7/31/2023
6 en TEO-540-C1A12/31/2024
en TIO-360-C1A6D6/1/2025
en TIO-540-AJ1A4/30/2016
en TIO-540-AK1A6/1/2025
en YO-233-B2A2/29/2016
en YTEO-540-B1A (Lancair)3/31/2016
Installation & Operation Manuals
NameRevisionLangSubjectDate
en IO-580-B1A3/31/2003
en AEIO-580-B1A5/31/2007
en IO-540-AF1A51/31/2008
1 en IO390A Series5/31/2009
en (L)IO-360-M1A6/30/2008
en YIO-390-B Series10/31/2009
B en YO-233-B2A Series10/31/2014
en YTEO-540-B1A Non-Certified Series9/30/2012
en AEIO-390-A Series3/31/2012
en O-540-A4E5 Series5/31/2012
en IO-540-AG1A5 Series10/31/2012
en HIO-390-A1A9/30/2017
en IO-360-N1A1/31/2016
en IO-360-P1A1/31/2017
en IO-390-C Series12/31/2016
en IO-390-D Series2/29/2020
en LIO-360-B1G68/31/2017
en TEO-540-C1A10/31/2018
1 en TEO-540-C1A3/31/2019
2 en TEO-540-C1A4/30/2021
3 en TEO-540-C1A6/30/2021
4 en TEO-540-C1A10/31/2021
en YTEO-540-B1A (Lancair)3/31/2016
Maintenance Manuals
NameRevisionLangSubjectDate
en HIO-390-A1A9/30/2017
en IO-360-N1A1/31/2016
en IO-360-P1A1/31/2017
en IO-390-C Series12/31/2016
en IO-390-D Series2/29/2020
en LIO-360-B1G68/31/2017
en IO-540-AG1A5 Series10/31/2012
en O-540-A4E5 Series5/31/2012
en YO233B2A Series5/31/2012
en YTEO-540-B1A Non-Certified Series11/30/2012
en TEO-540-C1A10/31/2018
1 en TEO-540-C1A3/31/2019
2 en TEO-540-C1A4/30/2021
3 en TEO-540-C1A6/30/2021
4 en TEO-540-C1A10/31/2021
en YO-233-B2A1/31/2021
en YTEO-540-B1A (Lancair)3/31/2016
Operator's Manuals
NameRevisionLangSubjectDate
en O-340 Series5/31/1975
1 en VO-435 & TVO-435 Series4/30/1999
en O-235 and O-290 Series12/31/1987
1 en O-235 and O-290 Series12/31/2006
3 en O-540, IO-540 Series2/28/2009
en VO-360 & IVO-360 Helicopter11/30/1999
7 en O-360, HO-360, IO-360, AIO-360, HIO-360 & TIO-360 Series3/31/1989
5 en O-360, HO-360, IO-360, AIO-360, HIO-360 & TIO-360 Series11/30/2009
en TIO-541 Series11/30/2007
en GO-480, IGO-480, GSO-480 and IGSO-480 Series6/30/2008
en IGO-540, IGSO-540 Series12/31/2007
4 en O-320, IO-320, AIO-320, LIO-320 Series2/28/1973
en VO-540, IVO-540, TIVO-540 Series4/30/2008
en IO-720 Series9/30/2006
1 en TO-360 Series7/31/1977
3 en TO-360 Series4/30/1997
en TO-360 Series12/31/2007
1 en AEIO-320, AEIO-360, AEIO-540 Series5/31/2007
en O-320 76 Series4/30/1976
1 en O-320 76 Series8/31/2008
3 en TIO-540 Series Angle Valve Cylinder Heads12/31/2012
2 en TIO-540 Series Parallel Valve Cylinder Heads9/30/2006
1 en O-360 76 Series4/30/1978
1 en O-360 76 Series7/31/2008
en TO-360 76 Series9/30/1980
en TO-360 76 Series6/30/2007
en TIO-540-AE2A Series10/31/2006
en O-320 Series10/1/2006
revised en O-320 Series1/1/2007
en IO-320 Series12/31/2006
en TIGO-541-E1A10/31/1988
Overhaul Manuals
NameRevisionLangSubjectDate
10 en Direct Drive11/30/1974
en O-290-D2 Series9/1/1954
Publication Indexes
NameRevisionLangSubjectDate
10 en Service Bulletins Letters and Instructions Index4/30/2020
11 en Service Bulletins Letters and Instructions Index11/30/2020
12 en Service Bulletins Letters and Instructions Index9/30/2021
13 en Service Bulletins Letters and Instructions Index1/31/2022
14 en Service Bulletins Letters and Instructions Index11/30/2023
2 en Service Bulletins Letters and Instructions Index8/31/2015
3 en Service Bulletins Letters and Instructions Index7/31/2017
4 en Service Bulletins Letters and Instructions Index12/31/2017
5 en Service Bulletins Letters and Instructions Index3/31/2018
6 en Service Bulletins Letters and Instructions Index6/30/2018
7 en Service Bulletins Letters and Instructions Index9/30/2018
8 en Service Bulletins Letters and Instructions Index12/31/2018
9 en Service Bulletins Letters and Instructions Index7/31/2019
en Service Bulletin Index4/30/1997
en Service Bulletins, Letters and Instructions7/31/2003
Service Bulletins
NameRevisionLangSubjectDate
2 en Rotating Component Service-Life Limit3/6/1989
1 en Mandatory Inspection/Modification of Overspeed Pickup Housing Assembly3/1/1971
3 en Replacement of Second Stage Gas Producer Cylinder Bolts MS9060-08 or MS9705-08 with New Bolts 1-110-262-014/15/1977
en Replacement/Modification of Torquemeter Pressure Boost Pump 1-300-221-01/02 with/to 1-300-221-03/041/1/1975
en Mandatory Introduction of Improved Compressor Rotor Assembly9/25/1973
en Conversion of Model T5313A Engines to Model T5313B Configuration12/1/1973
en Introduction of Improved Centrifugal Compressor Impeller11/15/1974
2 en Modification of All Fuel Regulators11/30/1979
en Special Inspection - Centrifugal Compressor Impeller 1-100-078-07 and -0811/26/1985
en Engine - Avoidance of Certain Power Turbine Speeds9/17/1990
B en Obsolescence of Early Type Exhaust Valve Seats1/13/1958
en Prevention of Detonation12/15/1953
en Lockwiring of Surge Chamber and Sediment Bowl Capscrew on Diaphragm Fuel Pumps9/1/1954
en Replacement of Accessory Drive Adapter Gasket12/10/1954
A en Mandatory Magneto Timing Discrepancies5/6/1957
E en Mandatory Inspection of Crankshaft Flange4/23/1993
F en Mandatory Inspection of Crankshaft Flange3/26/2013
en Method of Correcting Fuel Dye Strains at Stud Locations in Supercharger Housing9/10/1956
B en Mandatory Replacement of Valve Rocker Thrust Washers3/16/1992
E en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance6/14/1968
N en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance11/20/1995
P en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance5/4/1998
R en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance11/10/1999
S en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance2/5/2003
T en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance5/25/2006
U en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance5/8/2009
V en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance7/22/2010
W en Mandatory Parts Replacement at Overhaul and During Repair or Maintenance2/23/2012
A en Replacement of Cast Counterweights with Forged Counterweights5/20/1960
A en Replacement of Propeller Flange Bushings4/24/1959
A en Replacement of Intercylinder Baffle Assembly4/10/1959
en Propeller Leakdown Inspection. Replacement of Propeller Shaft OU Seal Rings and Sleeve9/7/1962
Supp 1 en Propeller Leakdown Inspection. Replacement of Propeller Shaft OU Seal Rings and Sleeve10/5/1962
B en PART I: Inspection of Exhaust Valve Guides PART II: Installation of New Camshafts5/26/1967
en Inspection and Replacement of Oil Pump Drive Shaft7/12/1963
en Mandatory One-Piece Main and Primary Venturi for Marvel-Schebler MA-4-5 Carburetor12/6/1963
A en Mandatory One-Piece Main and Primary Venturi for Marvel-Schebler MA-4-5 Carburetor7/3/1970
en Fuel and Oil Vent Restriction Requirement for AC Lightweight Diaphragm Fuel Pumps4/20/1964
A en Mandatory Crankshaft Propeller Flange Inspection11/2/1964
B en Mandatory Crankshaft Propeller Flange Inspection10/6/1967
B en Mandatory Maintenance Procedures and Service Limitations for Valves2/18/1977
en Replacement of Connecting Rod Assemblies, P/N 74308 and 74503 in IO-360-A1A Engines8/13/1965
A en Replacement of Connecting Rod Assemblies, P/N 74308 and 74503 in IO-360-A1A Engines10/25/1968
B en Heavy Connecting Rods for High Speed Helicopter Engines5/26/1972
C en Heavy Connecting Rods for High Speed Helicopter Engines8/11/1972
D en Heavy Connecting Rods for High Speed Helicopter Engines11/3/1972
E en Heavy Connecting Rods for High Speed Helicopter Engines8/10/1973
F en Heavy Connecting Rods for High Speed Helicopter Engines9/28/1973
B en Bendix RS Fuel Injection Bulletin No. 18, Revision 49/30/1966
en Replacement of AC Oil Filter Adapter Gasket3/4/1966
en Replacement of Crankshaft Idler Gear Shafts3/1/1966
B en Replacement of Crankshaft Idler Gear Shafts5/26/1967
A en Limited Travel Valve Lifter Replacement8/25/1967
C en Limited Travel Valve Lifter Replacement12/19/1969
B en Reduction Gear Assembly Inspection1/30/1970
en Crankcase Bearing Dowel Replacement4/17/1970
A en Crankcase Bearing Dowel Replacement7/22/1977
C en Inspection of Center Main Bearing1/19/1973
en Limited Travel Valve Lifter Replacement6/19/1970
A en Retighten and Lockwire Carburetor Throttle Arm Screw10/30/1970
B en Retighten and Lockwire Carburetor Throttle Arm Screw4/20/1973
en Fuel Line Inspection and Support Clamp Installation4/16/1971
A en Fuel Line Inspection and Support Clamp Installation4/14/1972
B en Periodic Inspection and Lubrication of Magneto Distributor Bushing. Magneto Parts Replacement - Left Magneto6/19/1972
C en Periodic Inspection and Lubrication of Magneto Distributor Bushing. Magneto Parts Replacement - Left Magneto12/15/1972
A en Turbocharger Exhaust System Inspection and Modification3/29/1974
A en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation5/26/1992
B en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation10/22/1993
C en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation4/28/2000
D en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation7/10/2001
E en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation5/18/2004
F en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation6/4/2010
G en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation7/16/2013
G, Supp 1 en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation8/29/2013
G, Supp 2 en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation1/23/2014
G, Supp 3 en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation11/2/2015
G, Supp 4 en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation2/14/2017
G, Supp 5 en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation3/13/2017
G, Supp 6 en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation4/17/2017
G, Supp 7 en Mandatory Fuel Line (Stainless Steel Tube Assy.) and Support Clamp Inspection and Installation2/27/2018
en Replacement of Torquemeter Oil Pump7/21/1972
A en Heavy Connecting Rods for High Speed Geared Drive Engines4/27/1973
B en Heavy Connecting Rods for High Speed Geared Drive Engines11/22/1974
en Addition of Alternator Bracket Support9/1/1972
en AiResearch Bulletin 1172-1A2/16/1973
A en Fuel Vent Line Check Valve Installation12/14/1973
en Magneto Grommet Replacement4/20/1973
A en Magneto Grommet Replacement7/5/1974
en Mandatory Carburetor Throttle Body Screw Inspection9/14/1973
A en Mandatory Carburetor Throttle Body Screw Inspection10/12/2007
B en Mandatory Carburetor Throttle Body Screw Inspection4/18/2008
C en Mandatory Carburetor Throttle Body Screw Inspection6/2/2016
C en Required Inspection of Part No. 69650 Piston Pin12/7/1973
D en Required Inspection of Part No. 69650 Piston Pin3/8/1974
F en Required Inspection of Part No. 69650 Piston Pin8/16/1974
F, Supp 1 en Required Inspection of Part No. 69650 Piston Pin9/17/1976
I en Mandatory Engine Inspection after Overspeed4/24/1991
J en Mandatory Engine Inspection after Overspeed11/22/2004
K en Mandatory Engine Inspection after Overspeed9/29/2010
L en Mandatory Engine Inspection after Overspeed4/18/2012
M en Mandatory Engine Inspection after Overspeed6/10/2016
P en Mandatory Engine Inspection after Overspeed9/19/2017
Q en Mandatory Engine Inspection after Overspeed4/26/2018
R en Mandatory Engine Inspection after Overspeed1/7/2019
S en Mandatory Engine Inspection after Overspeed4/8/2020
A en Mandatory Connecting Rod Assemblies With High-Tensile Strength Bolts (New Rod Kits With High-Crush Bearings)2/1/1974
B en Mandatory Connecting Rod Assemblies With High-Tensile Strength Bolts (New Rod Kits With High-Crush Bearings)5/4/1998
A en High-Tensile T-Bolt Clamping Bands3/15/1974
en Fuel Pump Inlet Inspection3/15/1974
A en Cross Shaft Support Tube Moisture Seal5/10/1974
en Bendix Service Bulletin No. 556B11/22/1974
C en Mandatory Oil Pump Woodruff Key Drive and Impeller Replacement11/7/1975
en Bendix Fuel System Bulletin No. RS431/17/1975
en Mandatory Oil Pump Impeller and Drive Replacement4/4/1975
C en Mandatory Oil Pump Impeller and Drive Replacement10/3/1975
C, Supp 1 en Mandatory Oil Pump Impeller and Drive Replacement3/18/1977
A en Mandatory Procedure to Determine Exhaust Valve and Guide Condition4/14/1978
B en Mandatory Procedure to Determine Exhaust Valve and Guide Condition5/13/1992
C en Mandatory Procedure to Determine Exhaust Valve and Guide Condition11/22/2004
A en Mandatory Exhaust Slip Joint Modification2/6/1976
C en Mandatory Exhaust Slip Joint Modification11/26/1976
en Transition Coupling Replacement3/5/1976
en Mandatory Recommended Corrective Action for Use of Incorrect Fuel4/30/1976
A en Mandatory Recommended Corrective Action for Use of Incorrect Fuel7/16/2010
B en Mandatory Recommended Corrective Action for Use of Incorrect Fuel11/22/2010
A en Mandatory Action to Take If Loss of Oil Pressure7/9/2010
en Mandatory Recommended Guidance After a Lightning Strike6/30/1976
A en Mandatory Recommended Guidance After a Lightning Strike5/25/2017
A en Mandatory Titan Fuel Pump Inspections12/1/1997
en Oil Level Gage Assemblies10/18/1976
A en Oil Level Gage Assemblies12/3/1976
en Bendix Service Bulletin No. 5878/26/1977
B en Mandatory Adapter Kit for Magneto Isolation Drive12/18/1990
C en Mandatory Adapter Kit for Magneto Isolation Drive12/15/2009
D en Mandatory Adapter Kit for Magneto Isolation Drive11/30/2015
en Intake and Exhaust Valve Rocker Arm Retaining Stud7/8/1977
A en Intake and Exhaust Valve Rocker Arm Retaining Stud9/2/1977
B en Intake and Exhaust Valve Rocker Arm Retaining Stud3/10/1978
en Hydraulic Tappet Face Inspection7/8/1977
en Bendix Service Bulletin No. 5898/26/1977
en Bendix Service Bulletin No. 5908/26/1977
en Bendix Service Bulletin No. 584A10/7/1977
en Fuel Line Between Fuel Pump and Fuel Injector6/16/1978
A en Crankshaft Assembly Replacement12/22/1978
en Mandatory Oil Pump Inspection and Impeller Replacement3/24/1978
en Mandatory Hydraulic Tappet Replacement3/24/1978
C en Mandatory Reprint of Teledyne Continental Ignition Systems Mandatory Service Bulletin No. MSB6453/14/1997
en Turbocharger Oil Drain Flange Replacement8/11/1978
en Mandatory Bendix Fuel Injector Bulletin No. RS-527/28/1978
en Mandatory Bendix Fuel Injector Service Bulletin No. RS-537/28/1978
en Mandatory Bendix Service Bulletin No. RS-547/28/1978
en Mandatory Slick Electro Service Bulletin No. l-78 "Magneto/Condenser Replacement"10/16/1978
A en Mandatory Bendix Service Bulletin No. W-57, Rev. 11/12/1979
en Mandatory Marvel-Schebler/Tillotson Service Bulletin No. Al-793/23/1979
en Replacement of Upper Exhaust Spring Seat and Hydraulic Lifter3/17/1979
A en Mandatory Inspection of Connecting Rods for Fretting and/or Galling and Repair of Fretting8/18/1993
A en Bendix Bulletin No. RS-62, Rev 29/4/1981
B en Mandatory The Use of Textron Lycoming LW-16702 Oil Additive9/8/1980
C en Mandatory The Use of Textron Lycoming LW-16702 Oil Additive11/23/1984
D en Mandatory The Use of Textron Lycoming LW-16702 Oil Additive3/10/1999
E en Mandatory The Use of Textron Lycoming LW-16702 Oil Additive7/18/2008
en Mandatory Inspection of Upper Exhaust Valve Spring Seats1/11/1980
B en Mandatory Inspection of Upper Exhaust Valve Spring Seats1/20/1995
en Mandatory Turbocharger Transition Waste Gate Assembly2/22/1980
A\ en Mandatory Turbocharger Transition Waste Gate Assembly11/20/1995
en AiResearch Service Bulletin No. TP60-01199/5/1980
C en Mandatory Aluminum Push Rods P/N 73806 on O-235 Series Engines7/3/1993
D en Mandatory Aluminum Push Rods P/N 73806 on O-235 Series Engines1/10/1997
B en Replacement of Oil Pump Impellers1/2/1987
A en Replacement of Oil Pump Impellers4/24/1981
B en Replacement of Oil Pump Impellers5/28/1982
D en Replacement of Oil Pump Impellers1/2/1987
A en Mandatory Replacement of Sintered Iron Oil Pump Impellers9/25/1981
C en Mandatory Replacement of Sintered Iron Oil Pump Impellers1/2/1987
F en Mandatory Replacement of Sintered Iron Oil Pump Impellers2/8/1993
A en Bendix Service Bulletin Revision No. 623A10/18/1985
A en Mandatory Crankshaft Flange Inspection for Aerobatic Engines1/6/1984
C en Mandatory Crankshaft Flange Inspection for Aerobatic Engines7/2/1993
en Bendix Bulletin No. RS-886/17/1983
B en Mandatory Slick Service Bulletin No. SB 2-8810/12/1988
en Bendix Service Bulletin No. 62710/18/1985
en Mandatory Avco Lycoming Oil Additive P/N LW-167029/20/1985
B en Mandatory Avco Lycoming Oil Additive P/N LW-167022/20/2009
A en Mandatory Crankshaft Gear Modification and Assembly Procedures7/16/1990
B en Mandatory Crankshaft Gear Modification and Assembly Procedures4/23/1993
C en Mandatory Crankshaft Gear Modification and Assembly Procedures1/30/2003
C, Supp 1 en Mandatory Crankshaft Gear Modification and Assembly Procedures9/12/2016
A en Mandatory Inspection and Rework of P/N LW-18790 Rocker Arm Assembly2/16/1987
en Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action1/18/1988
A en Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action5/4/1998
C en Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action2/26/1999
D en Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action7/13/2000
E en Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action4/13/2005
F en Mandatory Oil Servicing, Metallic Solids Identification After Oil Servicing, and Associated Corrective Action5/25/2017
en Facet Aerospace Products Service Bulletin No. A1-8712/9/1987
en Inspection, Alignment and Modification of Crossover Exhaust Assembly1/30/1989
en Mandatory Reprint of Precision Airmotive Corporation Service Bulletin #PRS-926/1/1989
en Inspection of Single Belt Driven Ring Gear Support Assemblies8/4/1989
en Mandatory Fuel Pump Vent Restriction7/7/1989
A en Mandatory Propeller Governor Line Support4/2/1990
A en Mandatory Inspection of Exhaust Transition Bolts2/21/1990
en Mandatory Installation of Restricted Fuel Pump Vent Fittings11/1/1990
en Mandatory Installation of New, Restricted Fuel Pump Vent Fittings in an Drive Fuel Pumps11/15/1990
en Mandatory Installation of One-Piece Exhaust Pipe Kit (05K21503)3/19/1991
A en Mandatory Installation of One-Piece Exhaust Pipe Kit (05K21503)6/14/1991
B en Mandatory Installation of One-Piece Exhaust Pipe Kit (05K21503)3/22/1993
B en Recall of Piston Pin Part No. LW-1407711/15/1991
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 10918/17/1992
en Mandatory Inspection of Crankshaft I.D. for Corrosion8/19/1994
A en Mandatory Inspection of Crankshaft I.D. for Corrosion10/18/1994
B en Mandatory Inspection of Crankshaft I.D. for Corrosion12/1/1997
A en Mandatory Inspection and Removal of TCM and Bendix S-20 and S-1200 Series Impulse Coupling Magnetos9/9/2016
en Mandatory Reprint of Teledyne Continental Motors Critical Service Bulletin No. CSB6412/25/1994
en Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves11/4/1994
A en Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves2/3/1995
B en Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves3/21/1995
C en Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves5/2/1995
D en Mandatory Inspection of Thermostatic Oil Cooler Bypass Valves8/16/2016
en Mandatory Removal of Shroud Tube Retaining Springs LW-14995 on Specified Engine and Affected Spares Before Further Notice5/25/1994
en Mandatory Incorrect Piston Shipped with Cylinder Kits P/N 05K21108, P/N 05K21118 and P/N 05K211047/22/1994
en Mandatory Inspection and Replacement of Push Rod P/N 7380611/1/1994
en Mandatory I. Replacement of Sintered Iron Oil Pump Impellers II. Replacement of Aluminum Oil Pump Impellers9/1/1995
Supp 1 en Mandatory I. Replacement of Sintered Iron Oil Pump Impellers II. Replacement of Aluminum Oil Pump Impellers1/18/1996
en Mandatory Inspection of High-Pressure Fuel Pump P/N LW-154739/3/1996
A en Mandatory Inspection of High-Pressure Fuel Pump P/N LW-1547310/7/1996
en Mandatory Replacement of Impulse Coupling Springs or Impulse Coupling Assembly on TCM (Bendix) D-2000 and D-3000 Impulse Dual Magnetos2/24/1997
A en Mandatory Recall of Piston Pin Part No. LW-1407710/1/1996
B en Mandatory Recall of Piston Pin Part No. LW-1407710/8/1996
C en Mandatory Recall of Piston Pin Part No. LW-140774/18/1997
en Mandatory Reprint of Teledyne Continental Ignition System Service Bulletin No. SB6581/10/1997
en Mandatory Reprint - Crane/Lear Romec Service Bulletin No. 101SB02012/1/1997
A en Mandatory Reprint - Crane/Lear Romec Service Bulletin No. 101SB0208/2/1999
B en Mandatory Reprint - Crane/Lear Romec Service Bulletin No. 101SB0206/10/2002
en Mandatory Application of Protective Coating on Crankshaft12/1/1997
A en Mandatory Application of Protective Coating on Crankshaft6/29/1998
B en Mandatory Application of Protective Coating on Crankshaft11/22/2004
B, Supp 1 en Mandatory Application of Protective Coating on Crankshaft10/10/2014
en Mandatory Insepction of Turbochargers and Tailpipes on TIO-540-AE2A Engines1/15/1997
Supp 1 en Mandatory Reprint - Precision Airmotive Corporation Service Bulletin No. PRS-10310/12/1998
A en Mandatory Recommended Action for Sudden Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip8/9/1999
B en Mandatory Recommended Action for Sudden Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip10/4/2012
C en Mandatory Recommended Action for Sudden Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip10/18/2016
en Mandatory I. Turbocharger Oil Drain Tank Inspection II. Turbocharger Oil Drain Tank Replacement3/24/1999
en Mandatory Reprint of Slick Service Bulletin No. SB1-9811/20/1998
A en Air Inlet Tube Replacement8/2/1999
A en Mandatory Reprint of Crane/Lear Romec Service Bulletins No. RG9080-73-001, No. RG9570-73-001, and No. RG17980-73-00111/22/2000
en Mandatory Valve Seat Inspection10/11/1999
en Mandatory Reprint of Teledyne Continental Motors (TCM) Ignition Systems Critical Service Bulletin No. CSB662A2/22/2000
A en Mandatory Oil Filter Converter Plate Gasket Replacement (Owner Advisory)8/30/2000
A, Supp 1 en Mandatory Oil Filter Converter Plate Gasket Replacement10/4/2000
B en Mandatory Oil Filter Converter Plate Gasket Replacement7/1/2003
C en Mandatory Oil Filter Converter Plate Gasket Replacement9/29/2010
C, Supp 1 en Mandatory Oil Filter Converter Plate Gasket Replacement8/31/2012
A en Mandatory Bearing Replacement - Part Identification4/2/2003
B en Mandatory Bearing Replacement - Part Identification10/6/2006
en Mandatory Oil Filler Tube Replacement2/20/2001
A en Mandatory Oil Filler Tube Replacement10/2/2001
en Mandatory Connecting Rod Bearing Replacement on TIO-540-AE2A Model Engines (Compliance with Textron Lycoming Special Advisory No. 59-800)3/7/2001
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
en Mandatory Diaphragm - Type Fuel Pump Inspection/Replacement3/8/2001
A en Mandatory Diaphragm - Type Fuel Pump Inspection/Replacement8/31/2005
en Mandatory Engine/Crankshaft Inspection3/23/2001
Supp 1 en Mandatory Engine/Crankshaft Inspection10/5/2001
en Mandatory Crankshaft Replacement in Lycoming TIO & LTIO-540 Engines Rated at 300 Horsepower and Higher (Info)2/1/2002
en Mandatory Crankshaft Replacement in Lycoming TIO & LTIO-540 Engines Rated at 300 Horsepower and Higher4/16/2002
Supp 1 en Mandatory Crankshaft Replacement in Lycoming TIO & LTIO-540 Engines Rated at 300 Horsepower and Higher9/5/2002
en Mandatory Crankshaft Inspection for Lycoming Six Cylinder Turbocharged Engines9/16/2002
Supp 1 en Mandatory Crankshaft Inspection for Lycoming Six Cylinder Turbocharged Engines12/16/2002
en Mandatory Crankshaft Gear Retaining Bolt Replacement9/30/2002
Supp 1 en Mandatory Crankshaft Gear Retaining Bolt Replacement9/30/2002
Supp 2 en Mandatory Crankshaft Gear Retaining Bolt Replacement11/4/2002
Supp 3 en Mandatory Crankshaft Gear Retaining Bolt Replacement11/12/2002
Supp 4 en Mandatory Crankshaft Gear Retaining Bolt Replacement4/2/2003
Supp 5 en Mandatory Crankshaft Gear Retaining Bolt Replacement8/15/2003
en Mandatory Oil Pump Body Plug Inspection11/25/2002
A en Mandatory Oil Pump Body Plug Inspection5/16/2003
Supp 1 en Mandatory Oil Pump Body Plug Inspection1/8/2003
Supp 2 en Mandatory Oil Pump Body Plug Inspection1/20/2003
en Mandatory Replacement of Washer P/N LW-112011/29/2003
en Mandatory Reprint - Precision Airmotive Corporation SB No. PRS-1055/7/2003
en Mandatory Inspection of Oil Suction Screen Area for Casting Voids11/17/2003
en Mandatory Reprint - Kelly Aerospace Power Systems (Electrosystems) SB No. A-112, Rev. A3/23/2004
en Mandatory Connecting Rod Bearing Replacement on (L)TIO-540-U2A, -V2AD & -W2A Engines8/6/2004
en Mandatory Inspection of Suction Screen Length12/10/2004
A en Mandatory Inspection of Suction Screen Length8/22/2008
en Mandatory Diaphragm - Type Fuel Pump Inspection/Replacement2/21/2005
en Mandatory Crankshaft Replacement in Lycoming Engines (Info)7/11/2005
Supp 1 en Mandatory Crankshaft Replacement in Lycoming Engines11/30/2005
en Mandatory Reprint of Slick Aircraft Products Service Bulletin No. SB1-88B3/27/2006
en Mandatory Crankshaft Retirement for Certain Lycoming Engines2/21/2006
A en Mandatory Crankshaft Retirement for Certain Lycoming Engines4/11/2006
A, Supp 1 en Mandatory Crankshaft Retirement for Certain Lycoming Engines5/27/2009
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
en Mandatory Missing Oil Passage Hole at Idler Shaft Location10/30/2006
en Mandatory Pressurized Magneto Pressure Tests2/23/2007
Supp 1 en Mandatory Pressurized Magneto Pressure Tests3/16/2007
en Mandatory Cylinder Stud Hole Cross-Threaded2/23/2007
A en Mandatory Cylinder Stud Hole Cross-Threaded7/20/2007
en Mandatory Reprint of Teledyne Continental Ignition Systems Service Bulletin No. SB633A9/21/2007
en Mandatory Reprint of Sky-Tec Service Bulletin No. 07-01, Rev D (Sky-Tec PM Model Starter Replacement)5/17/2007
A en Mandatory Reprint of Sky-Tec Service Bulletin No. 07-01, Rev D (Sky-Tec PM Model Starter Replacement)9/19/2008
en Mandatory Incorrect Cylinder Assemblies Shipped with Cylinder Kits9/21/2007
en Mandatory Clearance Between Oil Sump Assembly and Oil Sump Baffle11/16/2007
en Mandatory Reprint of Kelly Aerospace Service Bulletin No. 0292/15/2008
en Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin Nos. PRS-107, Rev 4 and PEX-1, Rev 13/13/2008
A en Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin Nos. PRS-107, Rev 4 and PEX-1, Rev 111/19/2008
en Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin No. MSA-137/18/2008
A en Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin No. MSA-1310/10/2008
A, Supp 1 en Mandatory Reprint of Precision Airmotive MANDATORY Service Bulletin No. MSA-1312/15/2009
en Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB2-086/3/2008
A en Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB2-087/21/2008
en Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB3-08A6/3/2008
A en Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB3-08A7/24/2008
B en Mandatory Reprint of MANDATORY Unison Service Bulletin No. SB3-08A10/17/2008
en Mandatory Incorrect Exhaust Valve Rotator Cap Shipped with Cylinder Kits P/N 05K21119, 05K21121, and 05K211223/17/2009
A en Mandatory Use of Aircraft Boost Pump with Kelly Aerospace 200F Series (Lycoming P/N 62E23185, 62E23186, 62E23187, 62E23188, 62E23189) Fuel Pumps11/13/2009
en Mandatory Reprint of Kelly Mandatory Service Bulletin No. 039A, Turbine Wheel Replacement3/19/2010
A en Mandatory Reprint of Kelly Mandatory Service Bulletin No. 039A, Turbine Wheel Replacement5/10/2010
en Mandatory Engine Inspection After Overboost9/29/2010
en Mandatory Intake Valve P/N 17A23942 Inspection for Date Stamp8/24/2010
A en Mandatory Intake Valve P/N 17A23942 Inspection for Date Stamp7/23/2014
B en Mandatory Intake Valve P/N 17A23942 Inspection for Date Stamp7/6/2015
en Mandatory Reprint of Hartzell Engine Technologies LLC (HET) (formerly Kelly Aerospace) Mandatory Service Bulletin 040 A1/10/2011
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
en Mandatory Reprint of AVStar Mandatory Service Bulletin AFSSB6 Revision 24/27/2011
en Mandatory Fuel Drain Valve Adapter Assembly P/N LW-138075/4/2011
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 Engines6/1/2011
en Mandatory Compliance with Hartzell Engine Technologies, LLC (Previously Kelly Aerospace) Service Bulletin No. 045, 201F Fuel Pump Inspection and Recall3/14/2012
en Mandatory Non-Compliant Oil Fill Tubes P/N 7752711/22/2011
en Mandatory Incorrect Part Numbers on Service Instruction No. 1098G3/8/2012
en Mandatory Reprint of Slick Service Bulletin SB11210/4/2012
Supp 1 en Mandatory Reprint of Slick Service Bulletin SB11210/9/2012
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 Replacement11/21/2012
en Mandatory Correction of Engine Data Plate on IO-540-AE1A5 Engines2/13/2014
en Mandatory Replacement of Hartzell Engine Technologies Fuel Pump Assemblies2/6/2014
Supp 1 en Mandatory Replacement of Hartzell Engine Technologies Fuel Pump Assemblies5/7/2015
en Mandatory Oil Level Gage Replacement4/5/2016
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 Replacement3/6/2014
en Mandatory Exhaust System Inspection and Turbocharger Mounting Bracket Replacement7/24/2014
A en Mandatory Exhaust System Inspection and Turbocharger Mounting Bracket Replacement10/10/2014
en Mandatory Diaphragm-Type Fuel Pump Replacement12/5/2014
en Mandatory Fuel Pumps P/N 62B26931 Shipped from the Factory from December 16, 2014 through January 14, 2015 not Marked with "SB615" Stamp2/5/2015
en Mandatory Hardness Check for Rocker Arm, Part Number LW-150144/9/2015
A en Mandatory Diaphragm-Type Fuel Pump Replacement9/2/2015
B en Mandatory Diaphragm-Type Fuel Pump Replacement10/5/2015
en Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-15A7/23/2015
A en Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-15A3/13/2019
en Mandatory Reprint of Hartzell Engine Technologies (HET) Service Bulletin SB-0622/3/2016
en Mandatory Reprint of Hartzell Engine Technologies (HET) Service Bulletin SB-0656/17/2016
en Mandatory Alternator Fan Backplate2/2/2016
en Mandatory AVStar Flow Divider (Lycoming Fuel Manifold) Inspection6/29/2016
A en Mandatory AVStar Flow Divider (Lycoming Fuel Manifold) Inspection12/20/2017
en Mandatory Exhaust System Inspection7/18/2016
A en Mandatory Exhaust System Inspection8/31/2016
B en Mandatory Exhaust System Inspection10/18/2016
C en Mandatory Exhaust System Inspection11/17/2016
C, Supp 1 en Mandatory Exhaust System Inspection6/27/2017
D en Mandatory Exhaust System Inspection4/10/2018
E en Mandatory Exhaust System Inspection5/17/2018
en Mandatory Reprint of Hartzell Engine Technologies (HET) Alert Service Bulletin (ASB) 0768/29/2017
A en Mandatory Reprint of Hartzell Engine Technologies (HET) Alert Service Bulletin (ASB) 07612/8/2022
en Mandatory Connecting Rod Bushing Inspection After Cylinder Removal4/10/2017
A en Mandatory Connecting Rod Bushing Inspection After Cylinder Removal6/13/2017
B en Mandatory Connecting Rod Bushing Inspection After Cylinder Removal6/11/2025
en Mandatory Identification of Connecting Rods with Non-Conforming Small End Bushings7/17/2017
A en Mandatory Identification of Connecting Rods with Non-Conforming Small End Bushings7/23/2017
B en Mandatory Identification of Connecting Rods with Non-Conforming Small End Bushings8/4/2017
en Mandatory Oil Level Gage (Dipstick) Replacement12/20/2017
en Mandatory Cylinder and Head Assembly Serviceable Life10/11/2018
en Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-193/14/2019
en Mandatory Inspection of Rocker Arm, Part Number LW-150141/17/2020
en Mandatory Incorrect Piston and Ring Combination3/22/2021
A en Mandatory Incorrect Piston and Ring Combination6/16/2021
en Mandatory Crankcase Nut Safety Wire Inspection9/16/2021
en Mandatory Small End Connecting Rod Bushing Inspection9/24/2021
en Mandatory T-Bolt Clamp Inspection1/14/2022
A en Mandatory T-Bolt Clamp Inspection4/22/2022
en Mandatory Incorrect Markings on Service Tool# ST-31012/14/2021
en Mandatory Wastegate Solenoid Valve Inspection and Cleaning12/2/2021
A en Mandatory Wastegate Solenoid Valve Inspection and Cleaning2/21/2022
B en Mandatory Wastegate Solenoid Valve Inspection and Cleaning4/4/2022
C en Mandatory Wastegate Solenoid Valve Inspection and Cleaning2/20/2025
en Mandatory Installation of Correct Electronic Ignition System (EIS)12/8/2022
en Mandatory Intake Pipe and Flange Inspection1/4/2023
en Mandatory Inspection for Rotator Caps on Intake Valves9/29/2022
en Mandatory Hartzell Engine Tech (HET) Alert Service Bulletin (ASB) No. 0989/8/2023
en Mandatory Hartzell Engine Tech (HET) Service Bulletin (SB) No. 2031/4/2024
en Mandatory Replacement of 6-Cylinder Electronic Ignition System (EIS)2/13/2024
A en Mandatory Replacement of 6-Cylinder Electronic Ignition System (EIS)4/2/2025
en Mandatory Starter Inspection, Hartzell Engine Tech (HET) Service Bulletin (SB) No.2111/8/2025
en Mandatory Reprint of Slick/Champion Aerospace Service Bulletin SB1-24A9/20/2024
en Mandatory STD-35 Plain Washer Replacement2/20/2025
en Introduction of Accessory Drive Gear Assembly 2-070-000-11 and No. 3 Bearing Support 2-060-261-043/15/1978
en Special Inspection of Compressor Bleed Band
1 en Special One Time Inspection of First Turbine Rotor Assembly8/19/1986
en Introduction of Improved Bleed Band 2-161-182-03 and New Retainers 2-160-561-014/30/1976
1 en Alert Flight Controls - Hydraulic Servo Actuator Inspection for Damaged Locking Washer10/19/2000
en Alert Flight Controls - Hydraulic Irreversible and Servo Actuator Inspection for Damaged Locking Washer10/19/2000
1 en Alert Fuel - Fuel Control - Introduction of Improved Fuel Control That Incorporates a Special Fuel Schedule and Bleed Band Operating Limits4/7/1992
2 en Alert Fuel - Fuel Control - Introduction of Improved Fuel Control That Incorporates a Special Fuel Schedule and Bleed Band Operating Limits3/4/1993
1 en Alert Turbine Section - One Time Inspection Winged No. 2 Bearing P/N 4-301-362-013/8/1994
22 en Time Limits - Component Service-Life Limits12/23/1992
11 en Component Service-Life Limits6/17/1987
1 en Replacement of No. 4 and 5 Bearing Oil Inlet Tubes10/14/1980
en Introduction of Improved Fourth Turbine Nozzle and Fireshield10/14/1980
1 en Introduction of Improved Fourth Turbine Rotor Assembly3/4/1983
en Introduction of Improved Chip Detector5/4/1984
en Compressor Section - Fourth Stage Compressor Vane Assembly - Inspection of Fourth Stage Compressor Vane Assembly3/27/1986
en Gas Producer - Introduction of Turbine Spacers 2-121-071-31/-356/8/1987
3 en Engine - Third Stage Disc - Special Inspection of Third Stage Disc Assembly 2-101-630-04/-0512/7/1990
en Engine - Compressor Rotor Third Stage Disc Assembly - One Time Inspection/Replacement of Compressor Rotor Third Stage Disc Assembly Coated with Suspect Sermetal W8/13/1991
en Engine - Shaft Assembly - Introduction of Improved or Reworked Third Turbine Rotor Shaft Assembly (Bladed or Unbladed)4/30/1993
1 en Reduction Gear and Shaft - Chip Detector Inspection Requirements3/23/1987
2 en Reduction Gear and Shaft - Chip Detector Inspection Requirements5/26/1987
en Gas Producer - Introduction of Turbine Spacers 2-121-071-31/356/8/1987
en Oil-Distribution - One Time Inspection of Oil Filter Bypass Valve3/23/1987
1 en Oil-Distribution - One Time Inspection of Oil Filter Bypass Valve5/26/1987
2 en Oil-Distribution - One Time Inspection of Oil Filter Bypass Valve9/8/1987
2 en Engine - Gas Producer Module - Special Inspection of Third Stage Disc Assembly 2-101-630-04/-058/8/1990
1 en Engine - Gas Producer Module - Alternate Special Inspection of Third Stage Disc Assembly 2-101-630-04/-0512/1/1989
en Engine - Gas Producer Module - Third Stage Compressor Disc Assembly 2-101-630-04/-05 Alternate Special Inspection11/30/1989
en Engine - Compressor Rotor Third Stage Disc Assembly - One Time Inspection/Replacement of Compressor Rotor Third Stage Disc Assembly Coated with Suspect Sermetal W8/13/1991
1 en Engine - Shaft Assembly - Introduction of Improved or Reworked Third Turbine Rotor Shaft Assembly (Bladed or Unbladed)3/31/1992
en Engine-Components - Removal of Certain Time/Life Sensitive Rotating Components2/7/1992
12 en Rotating Component Service-Life Limit5/31/1991
2 en Power Turbine Rotor Periodic Inspection5/12/1987
3 en Power Turbine Rotor Periodic Inspection5/29/1987
5 en Power Turbine Rotor Periodic Inspection1/15/1990
5 en Introduction of Improved Axial Compressors P/N 4-101-006-28/-32/-39/-419/25/1992
en Rear Bearing Support Housing (RBSH) Cleaning Procedure1/15/1988
1 en Introduction of Improved Gas Producer Turbines4/21/1986
en Turbine Section - One Time Inspection Power Turbine Rotor Assembly P/N 4-141-290-01/031/15/1993
en Turbine Section - One Time Inspection Power Turbine Rotor Assembly P/N 4-141-290-0111/27/1991
en Turbine Section - One Time Inspection of Gas Producer Rotor Discs P/N 4-111-015-04, -09, -149/1/1993
en Fuel System - One Time Inspection of Fuel Pump Internal Drive Spline9/1/1994
1 en Chip Detector Inspection Requirements3/18/1988
en Introduction of Overspeed Limiter3/21/1983
6 en Power Turbine Retention System - Installation8/14/1992
4 en Introduction of Power Turbine Retention System and Improved Power Turbine Rotor Assembly6/17/1991
2 en Engine Fuel and Control - Introduction of Over Speed Protection System8/14/1992
en Engine - Avoidance of Certain Power Turbine Speeds9/17/1990
2 en Introduction of Power Turbine Retention System and Improved Power Turbine Rotor Assembly6/17/1991
3 en Engine Fuel and Control - Introduction of Over Speed Protection System8/14/1992
4 en Engine - Rotating Component Service - Life Limit7/5/1994
2 en Special Inspection - Centrifugal Compressor Impeller12/16/1993
7 en Rotating Component Service-Life Limit6/25/1993
en Engine-Components - Removal of Time/Cycle Sensitive Impeller (Drawdown)6/25/1993
Service Instructions
NameRevisionLangSubjectDate
en Proper Maintenance of Carburetor Air Filters3/4/1960
C en Installation of Thermostatic Oil Cooler Bypass Valve7/21/2016
AJ en Required Time Between Overhaul (TBO) Schedule7/1/1992
AL en Required Time Between Overhaul (TBO) Schedule5/11/1998
AQ en Required Time Between Overhaul (TBO) Schedule1/12/2001
AR en Required Time Between Overhaul (TBO) Schedule6/22/2004
AS en Required Time Between Overhaul (TBO) Schedule5/25/2006
AT en Required Time Between Overhaul (TBO) Schedule5/9/2008
AU en Required Time Between Overhaul (TBO) Schedule11/18/2009
AV en Required Time Between Overhaul (TBO) Schedule7/8/2013
AW en Required Time Between Overhaul (TBO) Schedule2/24/2014
AY en Required Time Between Overhaul (TBO) Schedule2/26/2016
AZ en Required Time Between Overhaul (TBO) Schedule2/1/2017
BA en Required Time Between Overhaul (TBO) Schedule6/15/2017
BB en Required Time Between Overhaul (TBO) Schedule8/15/2017
BC en Required Time Between Overhaul (TBO) Schedule5/9/2018
BD en Required Time Between Overhaul (TBO) Schedule2/13/2019
BE en Required Time Between Overhaul (TBO) Schedule4/24/2020
L en Required Time Between Overhaul (TBO) Schedule6/1/1968
G en Tappets and Lifters3/2/1979
H en Tappets and Lifters5/23/1997
J en Tappets and Lifters2/23/2012
K en Tappets and Lifters6/27/2013
L en Tappets and Lifters1/21/2015
M en Tappets and Lifters4/10/2018
N en Tappets and Lifters1/7/2019
F, Supp 2 en Counterweights and Rollers on Engine Models8/7/2009
G en Counterweights and Rollers on Engine Models8/30/2011
G, Supp 1 en Counterweights and Rollers on Engine Models3/6/2012
G, Supp 2 en Counterweights and Rollers on Engine Models1/18/2013
H en Counterweights and Rollers on Engine Models1/9/2017
J en Counterweights and Rollers on Engine Models10/20/2017
K en Counterweights and Rollers on Engine Models1/7/2019
L en Counterweights and Rollers on Engine Models4/8/2020
M en Lubricating Oil Recommendations5/22/1995
N en Lubricating Oil Recommendations7/29/2020
en Replacement of Propeller Shaft Seal Rings4/28/1961
M en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines7/8/2002
N en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines12/15/2009
P en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines6/11/2014
S en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines1/9/2017
T en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines9/22/2017
U en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines2/14/2018
V en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines2/13/2019
W en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines4/28/2020
Y en Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines8/25/2021
AA en Approved Spark Plugs2/17/2015
AB en Approved Spark Plugs4/27/2016
AC en Approved Spark Plugs1/10/2017
AD en Approved Spark Plugs8/31/2017
AE en Approved Spark Plugs10/2/2017
AF en Approved Spark Plugs4/9/2018
AG en Approved Spark Plugs1/7/2019
AH en Approved Spark Plugs4/8/2020
W en Approved Spark Plugs5/15/2000
X en Approved Spark Plugs7/9/2002
Y en Approved Spark Plugs9/1/2006
Z en Approved Spark Plugs5/8/2009
A en Spark Plug Heli-Coil Insert Replacement9/19/1969
B en Inspection and Reconditioning Procedures for Nitride Hardened Steel Cylinders11/24/1967
C en Pre-Lubrication of Parts Before Assembly5/19/1987
D en Pre-Lubrication of Parts Before Assembly2/25/2011
E en Pre-Lubrication of Parts Before Assembly1/27/2016
en Push Rod Identification7/20/1962
J en Push Rod Identification3/10/2006
K en Push Rod Identification6/21/2010
L en Push Rod Identification5/3/2016
M en Push Rod Identification2/1/2017
P en Push Rod Identification8/31/2017
Q en Push Rod Identification9/25/2017
R en Push Rod Identification11/15/2017
S en Push Rod Identification2/14/2018
T en Push Rod Identification1/7/2019
U en Push Rod Identification4/22/2020
A en Tappet Clearance9/1/1978
A, Supp 1 en Tappet Clearance3/17/1997
aa en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models1/11/2019
AB en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models4/8/2020
C en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models4/23/1971
F en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models1/5/1973
M en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models3/7/2002
M, Supp 1 en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models3/21/2002
M, Supp 2 en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models9/28/2004
N en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models6/14/2006
P en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models4/18/2008
Q en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models7/16/2010
R en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models4/16/2012
S en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models4/24/2013
T en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models3/30/2016
U en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models1/30/2017
V en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models4/6/2017
W en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models8/10/2017
Y en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models10/12/2017
Z en Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models4/4/2018
B en Maintenance Items for Special Attention6/14/2006
C en Maintenance Items for Special Attention6/15/2007
D en Fuel Mixture Leaning Procedures3/25/1994
G en Propeller Flange Bushing Location4/30/2001
H en Propeller Flange Bushing Location3/8/2012
H, Supp 1 en Propeller Flange Bushing Location1/18/2013
J en Propeller Flange Bushing Location4/4/2016
K en Propeller Flange Bushing Location1/27/2017
L en Propeller Flange Bushing Location8/24/2017
M en Propeller Flange Bushing Location9/26/2017
N en Propeller Flange Bushing Location2/14/2018
P en Propeller Flange Bushing Location1/11/2019
Q en Propeller Flange Bushing Location4/8/2020
B en Periodic Inspection of Generator/Alternator Mounting Brackets5/5/2006
A en Replacement AC Fuel Pumps3/14/1969
C en Repair of Fretted Crankcases10/25/1968
D en Repair of Fretted Crankcases3/28/1975
E en Repair of Fretted Crankcases10/31/1988
A en Installation of Dowels and Rubber O-Ring Seals at Crankcase Thru-Stud Locations12/1/1972
D en Installation of Dowels and Rubber O-Ring Seals at Crankcase Thru-Stud Locations5/23/1997
C en Alternate Crankcase Parting Surface Sealants8/4/2006
D en Alternate Crankcase Parting Surface Sealants10/17/2008
C en Methods of Checking DC Alternator and Generator Belt Tension3/27/2015
D en Methods of Checking DC Alternator and Generator Belt Tension7/23/2015
B en Magneto Drop-Off6/18/2010
A en Replacement of Worn Starter Ring Gears5/9/2014
B, Supp 4 en Counterweight Bushing Inspection, Replacement, and Special Tooling Upgrades8/7/2009
C en Counterweight Bushing Inspection, Replacement, and Special Tooling Upgrades11/10/2011
C en Use of Carburetor Heat Control10/12/2007
F en FAA-Approved Starters and Alternators2/24/1997
H en FAA-Approved Starters and Alternators3/30/2000
J en FAA-Approved Starters and Alternators3/21/2002
K en FAA-Approved Starters and Alternators3/23/2004
K, Supp 1 en FAA-Approved Starters and Alternators7/15/2004
L en FAA-Approved Starters and Alternators1/27/2006
M en FAA-Approved Starters and Alternators5/26/2009
N en FAA-Approved Starters and Alternators3/14/2011
P en FAA-Approved Starters and Alternators3/8/2012
R en FAA-Approved Starters and Alternators2/12/2014
S en FAA-Approved Starters and Alternators3/30/2016
T en FAA-Approved Starters and Alternators1/10/2017
U en FAA-Approved Starters and Alternators4/9/2018
V en FAA-Approved Starters and Alternators1/11/2019
W en FAA-Approved Starters and Alternators4/16/2020
A en Oil Pump Application11/25/1991
B en Oil Pump Application4/12/2005
C en Adjustable Oil Pressure Relief Valve Installation and Valve Seat Repair or Replacement1/28/1983
A en Crankshaft & Gear Assembly: Inspection & Repair9/6/1968
C en Turbocharger Density Controller Adjustment
J en Turbocharger Density Controller Adjustment5/23/1997
en Malfunction of Slick Impulse Coupling Magneto6/6/1968
en Cylinder Compression3/31/1972
A en Cylinder Compression9/28/1998
A en Valve Spring Compressor No. ST2669/29/2010
C en Exhaust Flange Gaskets7/24/2009
D en Exhaust Flange Gaskets8/26/2010
B en Crankshaft Flange Bolt Replacement5/9/1980
B en Pinion Cage Attaching Nut Replacement3/27/1981
en Dry Air Pump Drive Oil Seal Replacement8/29/1969
A en Prestolite Service Bulletins No. ASM-3 and ASM-4. Aircraft Charging System Service Precautions5/7/1971
B en Assembly and Torque Procedures for V-Band Couplings1/6/2010
C en Pre-Oiling Engine Prior to Initial Start4/18/1997
B en Engine Conversion For Use of 100/130 or 100LL Grade Fuel12/15/2009
F en Valve Guides For Service Use4/5/2012
G en Horsepower, Manifold Pressure and RPM Values5/16/2008
en Sealing Oil Supply Ports10/13/1972
B en Piston Pin Plug Usage3/15/1985
C en Piston Pin Plug Usage2/26/1999
D en Piston Pin Plug Usage8/28/2009
en Hardened Oil Pump Impeller5/18/1973
C en Cleaning Fuel Injector Nozzles9/23/2008
en Starter Drive Lubrication3/23/1973
C en Oil Sump Baffle Replacement5/8/2012
D en Oil Sump Baffle Replacement5/15/2019
D en Rotator Type Intake Valves7/20/2021
C en Non-Destructive Testing of Lycoming Engine Parts7/20/2007
D en Non-Destructive Testing of Lycoming Engine Parts2/23/2012
D, Supp 1 en Non-Destructive Testing of Lycoming Engine Parts1/28/2014
E en Non-Destructive Testing of Lycoming Engine Parts1/30/2015
F en Non-Destructive Testing of Lycoming Engine Parts7/18/2017
F en Repair of Oil Leakage at Crankcase Thru-Stud Locations; Assembled and Unassembled Engines7/24/2009
en Ignition System for High Altitude Operation11/2/1973
B en Magneto Drive Gear and Cushion Modification9/24/2010
J en Engine Nameplate Replacement11/12/1999
E en Pressurized Magneto Pressure Test2/2/2007
E, Supp 1 en Pressurized Magneto Pressure Test3/16/2007
A en Repair of Oil Cooler By-Pass Valve Seat4/25/1986
en Tightening Procedure for Exhaust Manifold Components3/7/1975
B en Crankshaft Oil Seals10/30/2006
C en Crankshaft Oil Seals5/26/2009
D en Crankshaft Oil Seals1/25/2023
en Timing Change for 10-360 Series Engines10/3/1975
A en Piston Pin Identification5/25/2006
en Oil Pump Idler Shaft Lubrication7/30/1976
B en Set Screw for Propeller Governor Idler Shaft6/15/2007
C en Set Screw for Propeller Governor Idler Shaft3/10/2016
en Vacuum Pump Pad Oil Supply Port10/6/1978
B en Slick Magnetos10/16/1991
en Engine Mounting Bracket Attachment Nuts or Bolts6/22/1979
C en Trouble Shooting of the O-235 Series Engines9/25/1981
en Exhaust Manifold Tube Alignment10/5/1979
A en Overflow Oil from Breather Fitting of Inverted Oil System6/1/2016
B en Crankcase Parts for Use with Large-Diameter Hydraulic Lifters8/26/1983
C en Crankcase Parts for Use with Large-Diameter Hydraulic Lifters8/2/2011
D en Crankcase Parts for Use with Large-Diameter Hydraulic Lifters10/4/2012
E en Crankcase Parts for Use with Large-Diameter Hydraulic Lifters9/9/2014
B en Engine Mount Bracket Replacement3/19/2013
C en Engine Mount Bracket Replacement6/17/2016
A, Supp 1 en Lycoming Engines P/N LW-16702, Oil Additive11/12/1993
C en Lycoming Engines P/N LW-16702, Oil Additive2/20/2009
B en Bendix Service Bulletin No. RS77, Rev. 22/27/2012
A en New Turbocharger Mounting Hardware3/21/2019
A en Fuel Pump Drive Spline Lubrication2/25/2011
A en Installation Procedure for P/N 15B26066 Hydraulic Tappet/Plunger Assemblies12/15/2009
A en Suggested Maintenance Procedures to Reduce the Possibility of Valve Sticking1/19/1988
B en Lycoming Reciprocating Engine Break-In and Oil Consumption2/8/1993
C en Lycoming Reciprocating Engine Break-In and Oil Consumption12/29/2010
en Conversion from Constant Speed to Fixed Pitch Propeller and Vice Versa. Propeller Governor Oil Line Nut and Elbow4/25/1986
A en Adapter Kit for Magneto Isolation Drive9/29/2010
en Engine Timing Marks8/15/1986
A en Propeller Governor Pad Plate P/N LW-1234712/9/2005
A en Improved Oil Filter Bypass Valve3/28/2011
A en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines9/15/1991
E en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines5/19/2000
F en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines8/4/2006
G en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines12/15/2009
H en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines2/7/2012
H, Supp 1 en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines10/12/2012
J en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines2/17/2015
K en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines10/30/2015
L en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines4/27/2016
M en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines1/10/2017
N en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines8/9/2017
P en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines10/12/2017
Q en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines4/9/2018
R en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines4/16/2020
S en Approved Slick Magnetos and Lycoming Electronic Ignition System (EIS) on Lycoming Engines12/8/2022
en Possible Ruptured Pressure Regulator Diaphragm in a Fuel Pump8/9/1989
en Installation of Rotormaster Turbocharger (46A21184)3/23/1990
en Procedure to Replace Oil Filter Converter Plate Gasket5/9/1991
A en Procedure to Replace Oil Filter Converter Plate Gasket6/30/2003
B en Procedure to Replace Oil Filter Converter Plate Gasket9/24/2010
A en Rocker Arm Assembly Replacement Part2/25/2011
A, Supp 1 en Rocker Arm Assembly Replacement Part3/19/2013
A en Optional Remote-Mounted Oil Filter Kits2/1/2012
B en Connecting Rod Bolts (Identification and Installation)3/6/2001
C en Connecting Rod Bolts (Identification and Installation)2/3/2006
D en Connecting Rod Bolts (Identification and Installation)4/20/2007
E en Connecting Rod Bolts (Identification and Installation)7/24/2008
F en Connecting Rod Bolts (Identification and Installation)3/6/2012
G en Connecting Rod Bolts (Identification and Installation)11/10/2015
A en Propeller Oil Control Leak Test Procedure (With Propeller Installed on Engine)7/10/2003
en Removal of Preservative Oil From Engine8/12/1994
en Installation of Steel Push Rods3/17/1997
en Factory Engine Preservation4/18/1997
A en Factory Engine Preservation2/23/2007
B en Factory Engine Preservation2/8/2008
A en Valve Leak Check with Engine Cylinder Removed (Field Procedure)12/21/2010
A en Installation Torque for Fuel Metering Device, Carburetor, Fuel Injector Servo or "AN" Fuel Pump Hold Down Nuts9/21/2007
B en Installation Torque for Fuel Metering Device, Carburetor, Fuel Injector Servo or "AN" Fuel Pump Hold Down Nuts11/18/2010
C en Installation Torque for Fuel Metering Device, Carburetor, Fuel Injector Servo or "AN" Fuel Pump Hold Down Nuts3/29/2011
A en Exhaust Valve and Guide Identification Procedure7/2/2003
en Fuel Injector and Flow Divider Replacement10/28/1998
A en Fuel Manifold Spring Change6/11/2002
B en Fuel Manifold Spring Change10/27/2003
C en Fuel Manifold Spring Change3/9/2011
en Fuel Injector Check1/21/1999
A en Piston Pin Plug Wear Inspection12/30/1998
B en Piston Pin Plug Wear Inspection2/26/1999
C en Piston Pin Plug Wear Inspection7/14/2000
D en Piston Pin Plug Wear Inspection3/20/2009
A en Engine Procedures for Flight Training Operations4/12/2011
A en Recommended Engine Procedures for Purge of Vapor During Ground Operations4/13/2011
B en Recommended Engine Procedures for Purge of Vapor During Ground Operations1/7/2019
en Counterweight Roller Change for Robinson Helicopter1/11/2001
A en Installation of Inverter Flow Divider12/19/2000
en Accessory Drive Gear and Shaft Dowel Replacement12/20/2000
en Cylinder Assembly Replacement on O-235 Engines Operated Under DGAC Authority1/26/2001
en Cold Weather Starting7/1/2002
en Replacement of Impulse Coupling Magnetos on Four-Cylinder Engines4/20/2001
A en Replacement of Impulse Coupling Magnetos on Four-Cylinder Engines6/28/2016
en Dual Magneto Attachment4/17/2002
A en Dual Magneto Attachment8/15/2003
B en Dual Magneto Attachment12/19/2007
C en Dual Magneto Attachment2/10/2011
en Replacement of All P/N STD-1409 Nuts with P/N STD-2249 Nuts4/25/2003
en Adapter Kit for Magneto Isolation Drive4/30/2003
A en Adapter Kit for Magneto Isolation Drive4/22/2004
A en Inspection of "PID" Stamped Crankshafts5/26/2005
en Main and Connecting Rod Bearing Upgrade9/23/2004
Supp 1 en Main and Connecting Rod Bearing Upgrade8/28/2009
en Reprint of Lamar Service Information Letter No. LSI-0099/23/2004
en Roller Tappets Part Information Update3/10/2006
A en Roller Tappets Part Information Update7/18/2008
B en Roller Tappets Part Information Update2/23/2011
C en Roller Tappets Part Information Update10/13/2016
D en Roller Tappets Part Information Update2/5/2018
en Timing Change for TIO-540-AK1A Series Engines10/27/2006
en Reprint of Precision Service Information Letter No. SIL RS-843/14/2008
en Reprint of Precision Service Information Letter No. SIL RS-87 Revision 15/30/2008
A en Reprint of Precision Service Information Letter No. SIL RS-87 Revision 19/19/2008
en Reprint of Precision Service Information Letter No. SIL RS888/22/2008
en Reprint of Precision Service Information Letter No. SIL RS-35 Revision 111/19/2008
en Reprint of Precision Service Information Letter No. SIL RS-62 Revision 211/19/2008
en Lycoming Engines Carburetor Manufacturer Cross-References6/16/2009
A en Lycoming Engines Carburetor Manufacturer Cross-References11/20/2009
B en Lycoming Engines Carburetor Manufacturer Cross-References4/15/2013
C en Lycoming Engines Carburetor Manufacturer Cross-References11/15/2013
D en Lycoming Engines Carburetor Manufacturer Cross-References1/6/2015
E en Lycoming Engines Carburetor Manufacturer Cross-References9/16/2015
F en Lycoming Engines Carburetor Manufacturer Cross-References12/14/2015
G en Lycoming Engines Carburetor Manufacturer Cross-References3/16/2016
en Alternator Bracket Kit for 130A Alternators2/23/2009
en Reprint of Precision Service Information Letter No. SIL RS-921/16/2009
en New Piston Part Numbers8/25/2010
A en New Piston Part Numbers9/24/2010
B en New Piston Part Numbers11/4/2011
C en New Piston Part Numbers1/18/2012
D en New Piston Part Numbers3/29/2012
E en New Piston Part Numbers5/18/2012
F en New Piston Part Numbers5/5/2015
G en New Piston Part Numbers7/24/2015
en Aircraft Engine Starter Recommendations12/15/2009
en Hydraulic Lifter and Tappet Body Part Numbers11/20/2009
A en Hydraulic Lifter and Tappet Body Part Numbers6/30/2010
B en Hydraulic Lifter and Tappet Body Part Numbers2/23/2012
C en Hydraulic Lifter and Tappet Body Part Numbers7/16/2012
en Engine Inspection in Particulate-Laden Environments (Volcanic Ash, Sand, Dust, Airborne Debris)2/4/2011
en Alternator Bracket for Engines Equipped with Kelly Aerospace E-Drive Starters6/11/2010
en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines5/25/2012
A en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines2/6/2013
B en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines4/8/2013
C en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines3/5/2014
D en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines9/9/2014
E en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines11/26/2014
F en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines4/11/2016
G en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines1/10/2017
H en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines8/14/2017
J en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines10/12/2017
K en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines4/16/2018
L en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines4/16/2020
M en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines11/19/2021
N en Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines12/13/2023
en Approved Rotary Vane Fuel Pumps9/24/2010
A en Approved Rotary Vane Fuel Pumps5/5/2015
B en Approved Rotary Vane Fuel Pumps7/29/2015
C en Approved Rotary Vane Fuel Pumps9/3/2015
D en Approved Rotary Vane Fuel Pumps1/11/2019
E en Approved Rotary Vane Fuel Pumps4/7/2022
en Service Recommendations for Long-Term Storage of Engines that Use Automotive Fuel1/27/2011
en Counterweight and Roller Removal, Inspection, and Installation10/31/2011
Supp 1 en Counterweight and Roller Removal, Inspection, and Installation12/13/2011
en Fuel Manifold Spring Change2/4/2011
en Notification of Approved Tappet P/N 15B262622/23/2012
en Expanded Clearance in Crankcase Nose10/2/2012
en Specific Requirements for Installation and Removal of Electrical Lead on Hartzell Engine Technologies, LLC (Previously Kelly Aerospace) Starters10/4/2012
en Notification of Approved Fuel Pump Plunger P/N 23D267776/27/2012
en Additional Cylinder Fin Stabilizer3/26/2013
en Zip Strap Replacement5/7/2014
en New Piston Ring Part Numbers3/21/2014
en Adjusting Fuel Pressure on AN-Drive Type Fuel Pumps11/26/2014
en Propeller Governor Drive Set Screw Inspection3/10/2016
en Turbocharged Exhaust System Installation6/5/2014
A en Replacement Thermostatic Oil Cooler Bypass Valves5/4/2017
en Lycoming Engines Approves the Use of Safety Cable3/10/2016
A en Installation, Operation, and Maintenance of Lycoming Electronic Ignition System (EIS)9/2/2020
B en Installation, Operation, and Maintenance of Lycoming Electronic Ignition System (EIS)4/21/2021
en Alternate Oil Sump Fitting Configuration for Aerobatic Inverted Oil System12/12/2017
A en Alternate Oil Sump Fitting Configuration for Aerobatic Inverted Oil System8/3/2018
en Lockplate Installation for Induction Housing on TIO-540-AJ1A and IO-540-AC1A58/23/2018
en Plug Replacement of Vapor Return Fitting on Piper Installation of IO-360-B4A8/3/2018
en Lycoming TEO-540 Engine Series Approved Engine Configurations1/11/2019
A en Lycoming TEO-540 Engine Series Approved Engine Configurations5/23/2019
B en Lycoming TEO-540 Engine Series Approved Engine Configurations2/7/2020
C en Lycoming TEO-540 Engine Series Approved Engine Configurations6/14/2021
D en Lycoming TEO-540 Engine Series Approved Engine Configurations7/30/2021
E en Lycoming TEO-540 Engine Series Approved Engine Configurations11/22/2021
en New Connecting Rod Bushing3/11/2020
en Intake Valve In-Service Data11/10/2020
A en Intake Valve In-Service Data1/25/2023
en Exhaust System Replacement Components11/20/2020
en Fuel Injector Replacement6/14/2021
A en Fuel Injector Replacement11/22/2021
en Front Expansion Plug Replacement5/18/2022
en Oil Cooler Bypass Valve Assembly Replacement11/19/2021
A en Oil Cooler Bypass Valve Assembly Replacement12/1/2023
en Oil Filter Base Bypass Spring Replacement12/2/2021
en Reprint of AVStar Service Information Letter No. AFS-SIL-032/3/2022
en Rocker Box Cover Screws Torque Values and Torque Sequence2/14/2024
en Exhaust Bypass Valve Assembly Replacement12/1/2023
en Set up and Adjustment of Fuel Control. Installation of the Throttle Position Sensor (TPS) and Mixture Position Sensor (MPS)10/3/2024
en Incorrectly Marked Alternator Belts5/12/2025
Service Letters
NameRevisionLangSubjectDate
en Rear Bearing Support Housing Clogging Inspection10/10/1986
AG en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)11/4/1994
AK en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)8/25/2000
AL en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)2/27/2003
AM en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)1/6/2005
AN en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)2/3/2006
AP en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)7/20/2007
AQ en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)8/22/2008
AR en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)2/27/2009
AR, Supp 1 en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)7/31/2009
AS en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)3/26/2010
AT en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)2/8/2011
AU en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)2/23/2012
AU, Supp 1 en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)4/19/2012
AU, Supp 2 en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)8/7/2012
AV en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)3/19/2013
AV, Supp 1 en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)9/30/2013
AW en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)1/23/2014
AY en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)9/24/2015
AZ en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)12/17/2015
BA en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)6/29/2016
BC en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)2/16/2017
BD en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)9/1/2017
BE en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)9/27/2017
BF en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)4/26/2018
BG en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)2/13/2019
BH en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)4/13/2020
BJ en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)10/5/2021
BK en Reciprocating Engine and Accessory Maintenance Publications (RE: Domestic Publications Order Form and Export Publications Order Form)12/14/2023
en Conversion to Low Compression Engine1/29/1960
B en Heli-Coil Service Repair Kit1/29/1982
C en Recommendations Regarding Accidental Engine Stoppage, Propeller Strike, Loss of Propeller Blade or Tip5/20/1991
en General Aspects of Spectrometric Oil Analysis11/26/1971
C en Slick Aircraft Products Service Bulletin No. SB2-80C3/10/2006
en Engine Preservation for Active and Stored Aircraft1/4/1974
B en Engine Preservation for Active and Stored Aircraft11/13/2001
B en The Use of Higher Octane Aviation Fuel for Engines Rated for 80/87 Octane Fuel1/19/1988
B en Spark Plug Fouling1/19/1988
A en Recommendations to Avoid Valve Sticking1/19/1988
en Recommendations Regarding USE OF FUEL1/28/1983
A en Time Between Overhaul (TBO) Extension Kit4/10/1987
C en Wide Deck Cylinder Configuration on Lycoming Engines8/2/2011
B en Warranty Repair of Precision Airmotive Corporation Fuel Control Products6/21/2001
C en Warranty Repair of Precision Airmotive Corporation Fuel Control Products6/15/2007
B en Lycoming Publications Available on Microfiche8/4/2006
A en Tool Rental Program7/10/2002
B en Tool Rental Program6/15/2007
en Part Numbers Identified by Lycoming with -70 or -85 Suffix5/15/2003
A en Part Numbers Identified by Lycoming with -70 or -85 Suffix5/27/2009
en Improved Lower Idle Valve in Fuel Injectors1/6/2005
en Revision to Appendix 1 in Service Bulletin No. 5693/27/2006
en Special Service Publication No. SSP567, "Camshaft Regrinding"11/2/2007
en Shelf Life Requirements5/21/2010
A en Shelf Life Requirements5/15/2012
A, Supp 1 en Shelf Life Requirements8/31/2012
B en Shelf Life Requirements11/18/2013
C en Shelf Life Requirements2/28/2014
D en Shelf Life Requirements7/27/2015
E en Shelf Life Requirements3/2/2016
F en Shelf Life Requirements7/20/2016
G en Shelf Life Requirements11/23/2016
H en Shelf Life Requirements7/24/2017
J en Shelf Life Requirements8/23/2018
en O-235 Crankcase Design Upgrade1/14/2011
en Interim Alternative to Address the Discontinuation of Teledyne Dual Magnetos10/6/2010
en Lycoming Engines Exchange Engine Core Policy11/23/2010
A en Lycoming Engines Exchange Engine Core Policy7/29/2011
en Connecting Rod Bolt Marking11/23/2010
en Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products1/22/2013
A en Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products8/27/2013
B en Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products2/28/2014
C en Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products4/16/2018
en Lycoming Model Designation for All Carburetors4/15/2013
en Approved Diaphragm-Type Fuel Pumps4/26/2013
A en Approved Diaphragm-Type Fuel Pumps5/3/2016
en Part Number Supersedure for External Retaining Ring8/27/2013
en Product Improvements on Lycoming Carburetor P/N 61C260511/23/2014
en Alternate Carburetor4/23/2014
A en Alternate Carburetor11/11/2015
en New Piston Ring Part Numbers12/31/2014
en Discolored Paint on Cylinder3/11/2015
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, 20153/17/2015
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, 20151/27/2016
en Warranty and Owner Registration via Lycoming Engines Website2/16/2017
A en Warranty and Owner Registration via Lycoming Engines Website3/21/2024
en Extended Maintenance Intervals for Spark-Ignited Engines Operated on Unleaded Fuels4/5/2017
en How to Access Lycoming Digital Technical Publications2/16/2017
en Release of New Silicone Rocker Cover Gaskets7/17/2017
A en Release of New Silicone Rocker Cover Gaskets11/21/2017
B en Release of New Silicone Rocker Cover Gaskets2/14/2024
en Service Bulletin No. 632 Customer Care Program1/5/2018
en Warranty Procedure for Exhaust System Replacement Referenced in the Most Current Revision of SB6274/10/2018
A en Warranty Procedure for Exhaust System Replacement Referenced in the Most Current Revision of SB6275/17/2018
en Hartzell Engine Technologies and Lycoming Engines Alternator Distribution Agreement12/17/2019
en Lycoming Engines Product Support Hours7/12/2019
en Lycoming Model Designation for Fuel Injectors10/10/2019
A en Lycoming Model Designation for Fuel Injectors12/28/2023
en Australian Fuel Testing12/11/2020
en Alternate Ignition System2/19/2021
en Blemish on Cylinder Barrel3/17/2021
en Change in Cylinder Configuration for O-235-C, -E, and -H Series Engines8/25/2021
en Increased Fuel Economy and Improved Manifold Pressure Stability8/12/2021
en Alternate Bolt Locking of Wastegate Solenoid Valve12/16/2021
en Valve Spring Part Numbers3/2/2022
en Air Temperature Sensor P/N 60C2840911/9/2023
en Electronic Ignition System (EIS) Kits Discontinued6/13/2025
Special Advisories
NameRevisionLangSubjectDate
en Connecting Rod Bearing Replacement on TIO-540-AE2A Model Engines8/31/2000
en Turbocharger Mounting Bracket Bolt Inspection/Replacement8/17/2001
en Reprint of Unison Industries Mandatory Service Bulletin Nos. SB2-08 and SB3-085/15/2008
en Reprint of Unison Industries Mandatory Service Bulletin No. SB3085/21/2008
en Low RPM Engine Surge11/6/2013
en Mandatory AVStar Billet-Type Carburetor P/N 61C2612712/18/2014
en Hartzell Engine Tech (HET) Service Bulletin (SB) No. 2039/14/2023
User Manuals
NameRevisionLangSubjectDate
en Field Service Tool & Troubleshooting: TEO-540 Series7/31/2022
Miscellaneous
NameRevisionLangSubjectDate
en Replacement of Certain Crankshafts on Engines11/30/2005
en Handbook of Instructions with Parts Catalog: O-145 and GO-1457/31/1945
en A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
en A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
en A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
en A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
en A Compilation of Key Maintenance and Performance Articles Taken from the Former Lycoming "Flyer" Newsletter
en Some Tips on O-235 Engine
en Some Tips on O-235 Engine
en Operation Reference Manual: IO-390 Series
en Certificated Aircraft Engines11/30/2008
en Certificated Aircraft Engines5/31/2010
1 en Certificated Aircraft Engines11/30/2013
2 en Certificated Aircraft Engines4/30/2020
1 en Field Service Tool User Manual & Troubleshooting Guide8/31/2023
en Operating Recommendations for TEO-540-C1A Engine in Tecnam P2012 Traveller2/29/2024
en Special Servie Tools12/31/1984
en Special Servie Tools2/28/2010
en Operating Recommendations for TIO-540-AE2A Engine in New Piper Aircraft Malibu Mirage
1 en Operating Recommendations for TIO-540-AE2A Engine in New Piper Aircraft Malibu Mirage
2 en Operating Recommendations for TIO-540-AE2A Engine in New Piper Aircraft Malibu Mirage12/31/2008
en Reciprocating Engine Troubleshooting Guide11/30/2005
en Maintenance Procedure for the Inspection of Oil Filter and Suction Screen
A en "Experts" Are Everywhere to Help You
1 en Labor Allowance Guidebook - Reciprocating Aircraft Engines4/30/2000
2 en Labor Allowance Guidebook - Reciprocating Aircraft Engines1/31/2024
1 en Engine Mounted Oil Filter Kits and Replacement Filters1/31/1988
2 en Engine Mounted Oil Filter Kits and Replacement Filters
3 en Service Table of Limits and Torque Value Recommendations1/31/2017
4 en Service Table of Limits and Torque Value Recommendations4/10/2018
5 en Service Table of Limits and Torque Value Recommendations4/13/2020
en General Operating and Maintenance Recommendations for Lycoming Engines in Environments Laden with Volcanic Ash