Service Information: Enstrom Helicopter
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Table of Contents
Flight Manuals • Illustrated Parts Catalogs • Illustrated Tool Catalogs • Maintenance Alerts • Maintenance Manuals • Minimum Master Equipment Lists • Operational Suitability Data • Packing Instructions • Publication Indexes • Service Notes
Maintenance Manual Supplements: F-28/280 Series TH-28/480 Series
Operator's Manuals: F-28/280 Series TH-28/480 Series
Service Directive Bulletins: F-28/280 Series TH-28/480 Series
Service Information Letters: Service Information Letters F-28/280 Series TH-28/480 Series
Technical Tips: F-28/280 Series TH-28/480 Series
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| FM 28-AC-009 | 12 | en | F-28A | 03/28/2017 |
| FM 28-AC-013 | 9 | en | 280 | 03/28/2017 |
| FM 28-AC-016 | 9 | en | 280C | 03/28/2017 |
| FM 28-AC-018 | 17 | en | F-28F | 10/18/2024 |
| FM 28-AC-018 (revised pages) |
17 | en | F-28F | 10/18/2024 |
| FM 28-AC-019 | 8 | en | 280F | 08/16/2017 |
| FM 28-AC-019 | 9 | en | 280F | 09/12/2024 |
| FM 28-AC-019 (revised pages) |
9 | en | 280F | 09/12/2024 |
| FM 28-AC-020 | 11 | en | 280FX | 09/20/2017 |
| FM 28-AC-020 | 12 | en | 280FX | 12/03/2018 |
| FM 28-AC-020 (revised pages) |
13 | en | 280FX | 07/16/2020 |
| FM 28-AC-020 | 13 | en | 280FX | 07/16/2020 |
| FM 28-AC-020 (revised pages) |
14 | en | 280FX | 10/18/2024 |
| FM 28-AC-020 | 14 | en | 280FX | |
| FM 28-AC-022 | 20 | en | 480 | 05/19/2016 |
| FM 28-AC-022 (revised pages) |
21 | en | 480 | 10/09/2019 |
| FM 28-AC-022 | 21 | en | 480 | 10/09/2019 |
| FM 28-AC-083 | en | 480B | 08/12/2020 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| IPC F28/280 (revised pages) |
10 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 11/08/2023 |
| IPC F28/280 | 10 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 11/08/2023 |
| IPC F28/280 | 11 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 04/16/2024 |
| IPC F28/280 (revised pages) |
11 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 04/16/2024 |
| IPC F28/280 (revised pages) |
12 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 08/29/2024 |
| IPC F28/280 | 12 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 08/29/2024 |
| IPC F28/280 | 2 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 04/28/2000 |
| IPC F28/280 (revised pages) |
3 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 09/30/2013 |
| IPC F28/280 | 3 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 09/30/2013 |
| IPC F28/280 | 4 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 03/24/2017 |
| IPC F28/280 (revised pages) |
4 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 03/24/2017 |
| IPC F28/280 | 5 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 05/09/2018 |
| IPC F28/280 (revised pages) |
5 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 05/09/2018 |
| IPC F28/280 (cor notice) |
5 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 05/09/2018 |
| IPC F28/280 | 6 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 04/22/2019 |
| IPC F28/280 (revised pages) |
6 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 04/22/2019 |
| IPC F28/280 | 7 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 08/21/2019 |
| IPC F28/280 (revised pages) |
7 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 08/21/2019 |
| IPC F28/280 (revised pages) |
9 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 05/17/2023 |
| IPC F28/280 | 9 | en | 1987 Edition - F-28A, 280, F-28C, 280C, F-28F, 280F and 280FX | 05/17/2023 |
| IPC TH28/480 | 10 | en | 2001 Edition - TH-28, 480 and 480B | 12/20/2013 |
| IPC TH28/480 (TRT-001) |
11 | en | 2001 Edition - TH-28, 480 and 480B | 12/15/2015 |
| IPC TH28/480 | 11 | en | 2001 Edition - TH-28, 480 and 480B | 10/30/2015 |
| IPC TH28/480 | 12 | en | 2001 Edition - TH-28, 480 and 480B | 09/02/2016 |
| IPC TH28/480 (revised pages) |
13 | en | 2001 Edition - TH-28, 480 and 480B | 05/09/2018 |
| IPC TH28/480 | 13 | en | 2001 Edition - TH-28, 480 and 480B | 05/09/2015 |
| IPC TH28/480 (revised pages) |
14 | en | 2001 Edition - TH-28, 480 and 480B | 09/27/2018 |
| IPC TH28/480 | 14 | en | 2001 Edition -TH-28, 480 and 480B | 09/27/2018 |
| IPC TH28/480 (revised pages) |
15 | en | 2001 Edition - TH-28, 480 and 480B | 12/03/2019 |
| IPC TH28/480 | 15 | en | 2001 Edition - TH-28, 480 and 480B | 12/03/2019 |
| IPC TH28/480 (revised pages) |
16 | en | 2001 Edition - TH-28, 480 and 480B | 07/22/2020 |
| IPC TH28/480 | 16 | en | 2001 Edition - TH-28, 480 and 480B | 07/22/2020 |
| IPC TH28/480 (revised pages) |
17 | en | 2001 Edition - TH-28, 480 and 480B | 11/28/2022 |
| IPC TH28/480 | 17 | en | 2001 Edition - TH-28, 480 and 480B | 11/28/2022 |
| IPC TH28/480 (revised pages) |
18 | en | 2001 Edition - TH-28, 480 and 480B | 05/28/2024 |
| IPC TH28/480 | 18 | en | 2001 Edition - TH-28, 480 and 480B | 05/28/2024 |
| IPC TH28/480 (parts list) |
4 | en | 2001 Edition - TH-28, 480 and 480B | 10/15/2010 |
| IPC TH28/480 (parts list) |
4 | en | 2001 Edition - TH-28, 480 and 480B | 09/02/2010 |
| IPC TH28/480 | 4 | en | 2001 Edition - TH-28, 480 and 480B | 04/30/2010 |
| IPC TH28/480 (parts list) |
5 | en | 2001 Edition - TH-28, 480 and 480B | 06/21/2011 |
| IPC TH28/480 (parts list) |
5 | en | 2001 Edition - TH-28, 480 and 480B | 01/20/2011 |
| IPC TH28/480 | 5 | en | 2001 Edition - TH-28, 480 and 480B | 12/15/2010 |
| IPC TH28/480 (parts list) |
6 | en | 2001 Edition - TH-28, 480 and 480B | 09/09/2011 |
| IPC TH28/480 | 6 | en | 2001 Edition - TH-28, 480 and 480B | 07/29/2011 |
| IPC TH28/480 | 7 | en | 2001 Edition - TH-28, 480 and 480B | 01/30/2012 |
| IPC TH28/480 | 8 | en | 2001 Edition - TH-28, 480 and 480B | 07/31/2012 |
| IPC TH28/480 | 9 | en | 2001 Edition - TH-28, 480 and 480B | 02/01/2013 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| TC | en | Piston & Turbine | 03/30/2010 | |
| TC | 4 | en | Piston & Turbine | 01/01/2016 |
| TC | 5 | en | Piston & Turbine | 09/01/2016 |
| TC | 6 | en | Piston & Turbine | 01/01/2017 |
| TC Vol 10 | en | Piston & Turbine | 07/01/2018 | |
| TC Vol 10 | en | Piston & Turbine | 12/01/2021 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| MA 28-11307-1 | en | F-28/280 Series: Mount Cabin Seat LT | 08/03/2015 | |
| MA 28-16186-1 | en | F-28/280 Series: Pilot Collective Socket | 12/17/2014 | |
| MA 4129104-( ) | en | TH-28/480 Series: Oil Cooler Bearing Support | 12/19/2014 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| Supp 1 | 7 | en | Avionic Systems | 08/28/2017 |
| Supp 1 (revised pages) |
7 | en | Avionic Systems | 08/28/2017 |
| Supp 1 (revised pages) |
8 | en | Avionic Systems | 01/15/2019 |
| Supp 1 | 8 | en | Avionic Systems | 01/15/2019 |
| Supp 1 | 9 | en | Avionic Systems | 04/30/2020 |
| Supp 1 (revised pages) |
9 | en | Avionic Systems | 04/30/2020 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| Supp 1 | 8 | en | 480/480B Air Conditioning System P/N 4220176-( ) | 05/01/2017 |
| Supp 2 | 3 | en | Emergency Pop Out Floats | 03/21/2016 |
| Supp 4 | 1 | en | Chelton Flight Systems FlightLogic Electronic Flight Instrument System (EFIS) P/N 4220500-( ) | 11/09/2010 |
| Supp 5 | 15 | en | Avionic Systems | 08/15/2018 |
| Supp 5 (revised pages) |
15 | en | Avionic Systems | 08/15/2015 |
| Supp 5 | 16 | en | Avionic Systems | 05/07/2019 |
| Supp 5 | 17 | en | Avionic Systems | 05/23/2019 |
| Supp 5 | 18 | en | Avionic Systems | 04/30/2020 |
| Supp 5 (revised pages) |
18 | en | Avionic Systems | 04/30/2020 |
| Supp 6 | en | Partial Wide Instrument Panel | 11/15/2010 | |
| Supp 7 | en | Bambi Bucket Interface Kit P/N 4220130-1 | 04/30/2013 | |
| Supp 8 | 2 | en | G1000H Integrated Flight Deck System | 10/18/2019 |
| Supp 8 (revised pages) |
2 | en | G1000H Integrated Flight Deck System | 10/18/2019 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| MM 280 | en | 280 Series | 01/01/1977 | |
| MM F28 | revised | en | F-28A Series | 09/01/1975 |
| MM F28F/280F (revised pages) |
11 | en | F-28F/280F Series | 10/25/2019 |
| MM F28F/280F | 11 | en | F-28F/280F Series | 10/25/2019 |
| MM F28F/280F | 12 | en | F-28F/280F Series | 07/16/2020 |
| MM F28F/280F (revised pages) |
12 | en | F-28F/280F Series | 07/16/2020 |
| MM F28F/280F | 13 | en | F-28F/280F Series | 01/05/2024 |
| MM F28F/280F (revised pages) |
13 | en | F-28F/280F Series | 01/05/2024 |
| MM F28F/280F | 14 | en | F-28F/280F Series | 07/30/2024 |
| MM F28F/280F (revised pages) |
14 | en | F-28F/280F Series | 07/30/2024 |
| MM F28F/280F (revised pages) |
15 | en | F-28F/280F Series | 09/26/2024 |
| MM F28F/280F | 15 | en | F-28F/280F Series | 09/26/2024 |
| MM F28F/280F | 9 | en | F-28F/280F Series | 12/14/2017 |
| MM F28F/280F (revised pages) |
9 | en | F-28F/280F Series | 12/14/2017 |
| MM TH28/480 (revised pages) |
22 | en | TH-28/480 Series | 10/01/2014 |
| MM TH28/480 | 25 | en | TH-28/480 Series | 08/22/2016 |
| MM TH28/480 (revised pages) |
25 | en | TH-28/480 Series | 08/22/2016 |
| MM TH28/480 | 26 | en | TH-28/480 Series | 02/28/2020 |
| MM TH28/480 (revised pages) |
26 | en | TH-28/480 Series | 02/28/2020 |
| MM TH28/480 | 27 | en | TH-28/480 Series | 01/27/2025 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| MMEL 28-DO-374A | en | F-28F, F-28F-R & 280FX | 02/24/2016 | |
| MMEL 28-DO-375 | en | 480B | 12/11/2015 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| OSD 28-DO-376A | en | F-28F, F-28F-R & 280FX - Flight Crew Data | 02/24/2016 | |
| OSD 28-DO-377A | en | 480B - Flight Crew Data | 11/07/2016 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| OM 28-AC-028 | en | Garmin SL30 NAV/COM Transceiver | 02/16/2010 | |
| OM 28-AC-029 | en | Sandia Altitude Data System | 02/16/2010 | |
| OM 28-AC-031 | en | Garmin GNS 430W/530W Navigation System | 01/19/2009 | |
| OM 28-AC-032 | en | Garmin GDL 69/69A XM WX Satellite Weather/Radio Receiver | 01/19/2009 | |
| OM 28-AC-056 | en | Bendix/King KX 165A NAV/COM System | 01/16/2014 | |
| OM 28-AC-069 | 1 | en | Garmin GTN 650 Navigation System with MD200-306 CDI | 07/27/2015 |
| OM 28-AC-069 | 2 | en | Garmin GTN 650 Navigation System with MD200-306 CDI | 03/28/2019 |
| OM 28-AC-070 | en | GTX 330 Transponder with ADS-B Out | 07/27/2015 | |
| OM 28-AC-074 | en | Garmin GNC 255A NAV/COM Transceiver | 12/06/2017 | |
| OM 28-AC-080 | en | Garmin GMA 350Hc | 03/28/2019 | |
| OM 28-AC-080 | 1 | en | Garmin GMA 350Hc | 05/21/2019 |
| OM 28-AC-081 | en | GTX 345 ADS-B Transponder | 03/28/2019 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| OM 28-AC-022 | 22 | en | 480 | 05/14/2024 |
| OM 28-AC-022 (revised pages) |
22 | en | 480 | 05/14/2024 |
| OM 28-AC-023 | 23 | en | 480B | 04/28/2016 |
| OM 28-AC-023 | 24 | en | 480B | 05/21/2019 |
| OM 28-AC-023 (revised pages) |
24 | en | 480B | 05/21/2019 |
| OM 28-AC-023 | 25 | en | 480B | 01/27/2025 |
| OM 28-AC-024 | 1 | en | Bambi Bucket Interface Kit 4220130-1 | 04/30/2013 |
| OM 28-AC-027 | en | Avidyne Traffic Advisory System | 04/01/2009 | |
| OM 28-AC-035 | en | Sandia Altitude Data System | 02/16/2010 | |
| OM 28-AC-036 | en | 2+2 Seating Configuration | 10/26/2009 | |
| OM 28-AC-040 | 1 | en | KTR 908/KFS 598A VHF, KTR 909/KFS 599A UHF Communication Radio System and KMA 24H Audio System | 06/06/2012 |
| OM 28-AC-041 | 1 | en | Ukraine Registered Helicopters | 12/07/2011 |
| OM 28-AC-042 | en | Powerline Detection System | 03/11/2011 | |
| OM 28-AC-043 | en | Partial Wide Instrument Panel | 03/07/2011 | |
| OM 28-AC-048 | en | NAT AMS44 Dual Channel Audio Controller - NAT 247 Audio Mixing Amplifier | 01/25/2011 | |
| OM 28-AC-049 | 1 | en | Sandel SN3500 EHSI | 12/03/2014 |
| OM 28-AC-051 | en | Garmin GMA 350H | 07/02/2014 | |
| OM 28-AC-054 | 2 | en | Argentine Registered Helicopters | 12/17/2013 |
| OM 28-AC-055 | 1 | en | Garmin GNS 430W/530W Navigation System | 05/30/2017 |
| OM 28-AC-059 | en | Pulse Landing Light Installation P/N 4199005-111 | 07/02/2014 | |
| OM 28-AC-060 | 1 | en | Garmin G1000H Integrated Flight Deck | 05/19/2016 |
| OM 28-AC-061 | 1 | en | Garmin GTS 800 Traffic Advisory System | 03/30/2017 |
| OM 28-AC-062 | en | Garmin GDL 69AH XM WX Satellite Weather/Radio Receiver | 07/02/2014 | |
| OM 28-AC-063 | en | Garmin GNC 255A NAV/COM Transceiver with MD200-306 CDI | 12/03/2014 | |
| OM 28-AC-064 | 1 | en | Garmin GTN 650 Navigation System | 03/30/2017 |
| OM 28-AC-064 | 2 | en | Garmin GTN 650 Navigation System | 06/19/2019 |
| OM 28-AC-065 | en | Garmin GTX 327 Mode A/C Transponder | 12/03/2014 | |
| OM 28-AC-067 | en | Appareo Systems Vision 1000 | 03/23/2018 | |
| OM 28-AC-068 | 1 | en | Garmin GTN 650 GPS/NAV/COM (NAV Disabled) | 03/30/2017 |
| OM 28-AC-071 | 1 | en | RA-4500 Radar Altimeter | 01/05/2018 |
| OM 28-AC-075 | en | Garmin G1000H Integrated Flight Deck, Configuration P/N 4220650-3 | 03/22/2018 | |
| OM 28-AC-075 | 1 | en | Garmin G1000H Integrated Flight Deck, Configuration P/N 4220650-3 | 10/18/2019 |
| OM 28-AC-076 | en | Garmin GMA 350Hc | 10/01/2018 | |
| OM 28-AC-076 | 1 | en | Garmin GMA 350Hc | 05/21/2019 |
| OM 28-AC-077 | en | Helicopters Registered in Canada | 01/24/2019 | |
| OM 28-AC-078 | en | GTX 345 ADS-B Transponder | 12/19/2018 | |
| OM 28-AC-079 | en | MD200 Series CDI | 12/03/2018 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| PI PS.WAD.0050.V1 | en | Main Rotor Retention Assemblies | 12/31/2017 | |
| PI PS.WAD.0051.V1 | en | Main Rotor Spindle | 12/31/2017 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| OES 2020-06 | en | Optional Equipment Supplement | 06/01/2020 | |
| OES 2020-08 | en | Optional Equipment Supplement | 08/12/2020 | |
| SDB Piston 2024-05 | en | Piston Service Directive Bulletin | 05/17/2024 | |
| SDB Piston 2024-07 | en | Piston Service Directive Bulletin | 07/25/2024 | |
| SDB Piston 2025-03 | en | Piston Service Directive Bulletin | 03/28/2025 | |
| SDB Turbine 2023-12 | en | Turbine Service Directive Bulletin | 12/12/2023 | |
| SDB Turbine 2024-05 | en | Turbine Service Directive Bulletin | 05/13/2024 | |
| SIL Piston 2024-12 | en | Piston Service Information Letter | 12/02/2024 | |
| SIL Piston 2025-03 | en | Piston Service Information Letter | 03/28/2025 | |
| SIL Piston 2025-05 | en | Piston Service Information Letter | 06/24/2025 | |
| SIL Turbine 2024-10 | en | Turbine Service Information Letter | 10/14/2024 | |
| SIL Turbine 2025-01 | en | Turbine Service Information Letter | 01/16/2025 | |
| SIL Turbine 2025-06 | en | Turbine Service Information Letter | 06/24/2025 | |
| TPS 2024-10 | en | Technical Publications Status | 10/30/2024 | |
| TPS 2024-12 | en | Technical Publications Status | 12/02/2024 | |
| TPS 2025-03 | en | Technical Publications Status | 03/28/2025 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SDB 0001 | en | Main Rotor Transmission | 04/12/1967 | |
| SDB 0002 | en | Main Rotor Transmission | 07/26/1967 | |
| SDB 0003 | en | Ignition System | 07/27/1967 | |
| SDB 0004 | en | Tail Rotor Blade Life - P/N 28-15100 | 05/10/1968 | |
| SDB 0005 | en | Belt Drive Support Strut P/N 28-13227 | 08/04/1969 | |
| SDB 0006 | en | Lower Jack Strut Bearing O-Ring MS9021-042 | 10/23/1969 | |
| SDB 0007 | en | Torque, Main Rotor Transmission Pinion Shaft Nut NO-6 | 10/24/1969 | |
| SDB 0008 | A | en | Main Rotor Control Pitch Link | 10/22/1971 |
| SDB 0009 | A | en | Idler Yoke Assembly - P/N 28-13292 Rev. A | 05/30/1973 |
| SDB 0010 | en | Cancelled Inspection of Stabilizer Attach Tube, P/N 28-11222 | 02/03/2005 | |
| SDB 0011 | en | Taper Pins on Tail Rotor Drive Shaft | 03/29/1972 | |
| SDB 0012 | en | Tail Rotor Output Shaft Seal Housing | 05/18/1972 | |
| SDB 0013 | en | Cancelled Inspection of Idler Tension Straps, P/N 28-13236 | 02/03/2005 | |
| SDB 0014 | en | Main Rotor Hub Nut | 09/25/1972 | |
| SDB 0015 | en | Cyclic Stick Torque Tube Assemblies | 02/26/1973 | |
| SDB 0016 | C | en | Oil Level in Tail Rotor Gearbox | 09/25/1974 |
| SDB 0017 | C | en | Revised Transmission Overhaul Life | 01/03/1983 |
| SDB 0018 | A | en | Recommended Flight Procedure for Partial Loss of Power | 02/15/1974 |
| SDB 0019 | en | Cancelled Rapid Rotor Clutch Engagement | 05/31/2001 | |
| SDB 0020 | B | en | Main Rotor Spindles - P/N 28-14282, E.0. No. 8 | 04/02/1982 |
| SDB 0021 | C | en | Main Rotor Spindle P/N 28-142 82 | 04/02/1982 |
| SDB 0022 | en | Backfire Damage to Inlet Air System | 10/16/1974 | |
| SDB 0023 | en | Belt Tightening System | 10/18/1974 | |
| SDB 0024 | en | Main Rotor Blade Inspection | 12/17/1974 | |
| SDB 0025 | A | en | Main Rotor Hub Retention | 07/31/1975 |
| SDB 0026 | en | Cooling Air Turning Vane - P/N 280-126001-9 | 07/21/1975 | |
| SDB 0027 | en | Over-Running Clutch Assembly - P/N 28-13401 | 12/09/1975 | |
| SDB 0028 | en | Fuel Tank Vent Manifold | 12/09/1975 | |
| SDB 0029 | A | en | Tail Cone Attachment Bolts | 01/21/1976 |
| SDB 0030 | en | Bellcrank P/N 28-16338 - Tail Rotor Control System | 12/09/1975 | |
| SDB 0031 | en | Cancelled Main Rotor Shaft | 03/06/2000 | |
| SDB 0032 | en | Rubber Hose in Airspeed Indicator Pitot Line | 01/19/1976 | |
| SDB 0033 | en | Tail Rotor Control Pitch Link Retention | 01/21/1976 | |
| SDB 0034 | en | Copilot's Tail Rotor Pedal Clearance with Defroster Installation Mount Bolt | 01/22/1976 | |
| SDB 0035 | A | en | Upper Swashplate Bearing | 07/09/1990 |
| SDB 0036 | en | Main Rotor Shaft | 08/02/1976 | |
| SDB 0037 | A | en | Tail Rotor Spindle | 01/17/1977 |
| SDB 0038 | en | Cancelled Inspection of Stabilizer Attach Tube | 02/03/2005 | |
| SDB 0039 | en | Inspection of Tail Rotor Drive Shaft After Tail Rotor Strike | 05/12/1977 | |
| SDB 0040 | en | Replacement of Wide Chord Tail Rotor Pitch Link Retainer Assembly, P/N 28-16320; Guide Bolt, P/N 28-16307 | 05/20/1977 | |
| SDB 0041 | en | Tail Rotor Cable Corrosion in Engine Compartment Area | 05/26/1977 | |
| SDB 0042 | en | Readjusted Wide-Chord Tail Rotor Counterweight | 07/28/1977 | |
| SDB 0043 | en | Special Inspections - Tail Rotor Controls | 07/11/1977 | |
| SDB 0044 | en | Replacement and Installation of Tail Rotor Thrust Bearing Stack | 08/08/1977 | |
| SDB 0045 | en | Inadvertent Engine Stoppage on Power Reductions at High Density Altitudes | 11/02/1977 | |
| SDB 0046 | en | Dual Collective Stick Reinstallation | 12/02/1977 | |
| SDB 0047 | en | Main Rotor Transmission | 12/13/1978 | |
| SDB 0048 | A | en | Wide Chord Tail Rotor Blade Grip | 09/08/1980 |
| SDB 0049 | en | Main Rotor Transmission Mount Bolts | 04/03/1979 | |
| SDB 0050 | en | Special Inspection: Collective Control Bellcrank P/N 28-16189 | 07/01/1980 | |
| SDB 0051 | en | Main Rotor Transmission Mounting Hardware | 08/07/1980 | |
| SDB 0052 | en | Repair of Five Wire Connector | 03/17/1981 | |
| SDB 0053 | en | Compliance to Avco Lycoming Service Bulletin No. 454 "Replacement of Oil Pump Impellers" | 04/30/1981 | |
| SDB 0054 | 1 | en | Wastegate Linkage Assembly | 02/15/2002 |
| SDB 0055 | A | en | Clutch Control System Rigging and Heat Protection | 04/02/1982 |
| SDB 0056 | en | Replacement of Pitch Link Retainer and Service Improvement of Pitch Control System | 12/02/1981 | |
| SDB 0057 | en | Periodic Inspections of Lamiflex Bearings and Shims in Main Rotor Blade Retention Assembly | 01/11/1982 | |
| SDB 0058 | en | Removal of Induction Pressure Relief Valve | 07/27/1982 | |
| SDB 0059 | en | Installation of Covers on Right Side Engine Compartment Door Louvers | 06/18/1982 | |
| SDB 0060 | en | Compliance to Avco Lycoming Service Bulletin No. 461 and Bendix Service Bulletin No. 617A | 07/28/1982 | |
| SDB 0061 | en | Clutch Engagement Overcenter Lock Warning Light Installation | 11/12/1982 | |
| SDB 0062 | en | Belt Tensioning and Idler System Modifications | 11/02/1982 | |
| SDB 0062 | 1 | en | Belt Tensioning and Idler System Modifications | 03/28/2025 |
| SDB 0063 | en | Possible Bendix Impulse Coupling Defect as Noted by Emergency AD Issued on or about 9/9/82 | 10/05/1982 | |
| SDB 0064 | en | Collective Friction Usage | 10/19/1982 | |
| SDB 0065 | B | en | Tail Rotor Driveshaft Spline Couplings, P/N 28-13609 | 07/09/1990 |
| SDB 0066 | en | Lateral Trim Actuator Location Change, Kit Number 28-01027 | 10/01/1984 | |
| SDB 0067 | en | Narrow Chord Tail Rotor Forged Grips | 10/01/1984 | |
| SDB 0068 | A | en | Life Limit - Overrunning Clutch, P/N 28-13401-1 (Mfg. P/N CL40526-1 thru -7) | 07/09/1990 |
| SDB 0069 | A | en | Established TBO on Overrunning Clutch P/N 28-13401-2 or -4 (Mfr. P/N CL-40526-8 and above) | 07/09/1990 |
| SDB 0070 | en | Clutch Engagement Handle Guard | 05/08/1986 | |
| SDB 0071 | en | Improved Procedure for Idle Mixture Adjustment | 05/08/1986 | |
| SDB 0072 | en | Rotor Head Hub Plates | 05/15/1986 | |
| SDB 0072 | en | Cancelled Rotor Head Hub Plates | 03/29/2007 | |
| SDB 0073 | en | Wastegate Position Fixity | 05/15/1987 | |
| SDB 0074 | en | Control Cable Corrosion in Engine Compartment | 05/15/1987 | |
| SDB 0075 | en | Tail Rotor Cable Blade Strikes | 06/08/1987 | |
| SDB 0076 | en | Cracked Stabilizer Spar, P/N 28-11222-1 | 12/15/1987 | |
| SDB 0076 | 1 | en | Cracked Stabilizer Spar, P/N 28-11222-1 | 06/03/2016 |
| SDB 0077 | B | en | Tail Rotor Spindle, P/N 28-150064-11 and -13 Life Limit Addition | 11/16/1992 |
| SDB 0077 | C | en | Tail Rotor Spindle, P/N 28-150064-11 and -13 Life Limit Addition | 06/05/2020 |
| SDB 0078 | en | Tail Rotor Gearbox Inspection | 10/18/1989 | |
| SDB 0079 | en | Landing Gear Leg Cracks, P/N 28-17132-1 thru -4 | 10/18/1989 | |
| SDB 0080 | en | Tail Rotor Drive Flex Coupling Mandatory Upgrade to (7) Plate Coupling, Inspection & Service Life | 10/18/1989 | |
| SDB 0081 | 2 | en | Lamiflex Bearing Inspection (P/Ns 28-14320-12 and 28-14320-15) | 02/03/2017 |
| SDB 0081 | A | en | Lamiflex Bearing Inspection (P/Ns 28-14320-12 and 28-14320-15) | 11/16/1992 |
| SDB 0082 | A | en | Inadvertent Trim Motor Operation on 24 Volt D.C. Systems | 03/18/1993 |
| SDB 0083 | en | Wrapped Main Rotor Shafts P/N 28-13183, All Versions | 07/16/1993 | |
| SDB 0084 | 1 | en | Muffler Modification and Inspection | 10/06/2000 |
| SDB 0084 | 2 | en | Muffler Modification and Inspection | 10/27/2010 |
| SDB 0085 | en | Cancelled Compliance with Textron Lycoming Service Bulletin 524 and Owner's Advisory #OA524 | 07/20/2001 | |
| SDB 0086 | en | Cancelled Electrical System Maintenance and Inspection for Proper Operation, 12 Volt | 07/20/2001 | |
| SDB 0087 | en | Mandatory Serialization of Drag Links | 11/19/1996 | |
| SDB 0088 | en | Cracks in Lower Swashplate Universal Housing, P/N 28-16119-1 | 05/28/1997 | |
| SDB 0089 | en | Tail Rotor Gearbox Input Seal | 10/16/1998 | |
| SDB 0089 | 1 | en | Tail Rotor Gearbox Input Seal | 01/07/2014 |
| SDB 0090 | en | 12 Vdc Voltage Control System Modification | 10/26/1998 | |
| SDB 0090 | 1 | en | 12 Vdc Voltage Control System Modification | 04/23/2015 |
| SDB 0090 | 2 | en | 12 Vdc Voltage Control System Modification | 11/21/2023 |
| SDB 0090 | 3 | en | 12 Vdc Voltage Control System Modification | 06/05/2024 |
| SDB 0091 | 1 | en | Lower Swashplate Assembly Inspection | 03/06/2000 |
| SDB 0091 | 2 | en | Lower Swashplate Assembly Inspection | 02/18/2025 |
| SDB 0092 | en | Fuel Quantity System Calibration | 03/06/2000 | |
| SDB 0092 | 1 | en | Fuel Quantity System Calibration | 10/16/2012 |
| SDB 0092 | 2 | en | Fuel Quantity System Calibration | 07/07/2014 |
| SDB 0092 | 3 | en | Fuel Quantity System Calibration | 08/03/2015 |
| SDB 0093 | 1 | en | Tail Rotor Control Cable Inspection | 12/09/2003 |
| SDB 0094 | 2 | en | Cracked Main Rotor Shaft | 02/15/2002 |
| SDB 0095 | en | Idler Pulley Actuator Arm Inspection | 09/05/2002 | |
| SDB 0095 | 1 | en | Idler Pulley Actuator Arm Inspection | 10/15/2012 |
| SDB 0096 | en | Main Rotor Push-Pull Rod Inspection | 09/10/2003 | |
| SDB 0096 | 1 | en | Main Rotor Push-Pull Rod Inspection | 02/15/2019 |
| SDB 0096 | 2 | en | Main Rotor Push-Pull Rod Inspection | 04/02/2019 |
| SDB 0097 | en | Incorrect Installation Hardware on Seat Belt Bracket, P/N 28-11467-1 | 02/03/2005 | |
| SDB 0098 | en | Cancelled Incorrect Marking of ECD002-11 Bearing Set | 08/25/2010 | |
| SDB 0098 | en | Incorrect Marking of ECD002-11 Bearing Set | 02/03/2006 | |
| SDB 0099 | en | Non-Conforming Tie Rod Assemblies, P/N 28-16498-9 & 28-16498-101 | 03/29/2006 | |
| SDB 0100 | en | Inspect Swashplate Rod End (Dog Leg) Assembly, P/N 28-16143-1, for Excessive Play/Wear | 04/28/2006 | |
| SDB 0101 | en | Inspect Main Rotor Control Rods, P/N 28-16253-103/105, for Loose Upper Fittings | 05/23/2006 | |
| SDB 0102 | en | Hinge Pins (Main Rotor Blade Retention Pins), P/N 28-14007-3, Manufactured from Incorrect Specification Material | 03/20/2007 | |
| SDB 0103 | en | Inspection of Turbocharger Bypass Tube | 05/03/2007 | |
| SDB 0104 | en | Possible Interference Involving Main Rotor Pitch Change Bellcrank (Cyclic Walking Beam) (Clarification) | 10/06/2008 | |
| SDB 0105 | en | Collective Bellcrank Inspection | 10/17/2008 | |
| SDB 0106 | en | Main Rotor Pitch Change Bellcranks Missing Chamfers | 11/03/2008 | |
| SDB 0107 | en | Wastegate Linkage Assembly | 11/07/2008 | |
| SDB 0108 | en | Cracked Pylons | 04/16/2009 | |
| SDB 0108 | 1 | en | Cracked Pylons | 09/14/2009 |
| SDB 0109 | en | Idler Yoke Inspection, P/N 28-13299-1 | 09/09/2010 | |
| SDB 0109 | 1 | en | Idler Yoke Inspection, P/N 28-13299-1 | 10/27/2010 |
| SDB 0110 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 02/07/2011 | |
| SDB 0110 | 1 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 04/15/2011 |
| SDB 0110 | 2 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 05/16/2011 |
| SDB 0110 | 3 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 07/06/2011 |
| SDB 0110 | 4 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 01/23/2012 |
| SDB 0111 | en | Tail Rotor Driveshaft and Tach Drive Pulley Guard Inspection | 04/26/2011 | |
| SDB 0111 | 1 | en | Tail Rotor Driveshaft and Tach Drive Pulley Guard Inspection | 06/29/2011 |
| SDB 0111 | 2 | en | Tail Rotor Driveshaft and Tach Drive Pulley Guard Inspection | 02/26/2025 |
| SDB 0112 | en | Cooling Fan Assembly Inspection | 09/22/2011 | |
| SDB 0113 | en | Cyclic Trim Actuator Switch Assembly Inspection | 09/27/2011 | |
| SDB 0114 | en | Pylon Tube Inspection, P/N 28-11100-71 | 01/23/2012 | |
| SDB 0115 | en | Trim Relay Replacement | 01/09/2013 | |
| SDB 0116 | en | Cyclic and Collective Control Tube Assembly Inspections | 03/22/2013 | |
| SDB 0116 | 1 | en | Cyclic and Collective Control Tube Assembly Inspections | 11/07/2017 |
| SDB 0116 | 2 | en | Cyclic and Collective Control Tube Assembly Inspections | 10/13/2020 |
| SDB 0116 | 3 | en | Cyclic and Collective Control Tube Assembly Inspections | 04/11/2023 |
| SDB 0117 | en | Main Rotor Drive Belt | 07/07/2014 | |
| SDB 0117 | 1 | en | Main Rotor Drive Belt | 05/12/2015 |
| SDB 0117 | 3 | en | Main Rotor Drive Belt | 11/07/2017 |
| SDB 0117 | 4 | en | Main Rotor Drive Belt | 11/21/2023 |
| SDB 0118 | en | Idler Yoke Inspection, P/N 28-13299-3 (Machined Component) | 12/16/2014 | |
| SDB 0118 | 1 | en | Idler Yoke Inspection, P/N 28-13299-3 (Machined Component) | 12/11/2015 |
| SDB 0119 | en | Main Rotor Spindle, P/N 28-14282-11 and P/N 28-14282-13 | 02/11/2015 | |
| SDB 0119 | 1 | en | Main Rotor Spindle, P/N 28-14282-11 and P/N 28-14282-13 | 04/01/2015 |
| SDB 0119 | 2 | en | Main Rotor Spindle, P/N 28-14282-11 and P/N 28-14282-13 | 06/01/2015 |
| SDB 0119 | 3 | en | Main Rotor Spindle, P/N 28-14282-11 and P/N 28-14282-13 | 06/24/2016 |
| SDB 0120 | en | Collective Stick Socket Inspection | 04/29/2015 | |
| SDB 0121 | en | Mixture Adjustment Rod Assembly | 03/21/2016 | |
| SDB 0122 | en | Exhaust Clamp Installations | 07/14/2016 | |
| SDB 0122 | 1 | en | Exhaust Clamp Installations | 08/02/2017 |
| SDB 0122 | 2 | en | Exhaust Clamp Installations | 04/26/2018 |
| SDB 0123 | en | Oil Pressure Line, Restrictor | 12/01/2016 | |
| SDB 0123 | 1 | en | Oil Pressure Line, Restrictor | 05/19/2017 |
| SDB 0124 | en | Landing Gear Assembly - Clamp Inspection | 02/03/2017 | |
| SDB 0125 | 1 | en | Tail Rotor Rotating Controls Installation Inspection | 11/10/2017 |
| SDB 0126 | en | Cabin Bellcrank Mounts and Bellcrank Attachment Inspection | 04/26/2017 | |
| SDB 0126 | 1 | en | Cabin Bellcrank Mounts and Bellcrank Attachment Inspection | 07/06/2023 |
| SDB 0127 | en | Rod End Inspection | 08/02/2017 | |
| SDB 0127 | 1 | en | Rod End Inspection | 10/06/2017 |
| SDB 0127 | 2 | en | Rod End Inspection | 06/20/2018 |
| SDB 0128 | en | Copilot Collective - Retention Pin Installation | 12/20/2017 | |
| SDB 0129 | en | Air Filter Container Door Hinge Pins | 01/22/2019 | |
| SDB 0130 | en | Battery Hold Down Installation | 04/02/2019 | |
| SDB 0131 | 1 | en | Tail Rotor Control Cable Corrosion | 01/17/2020 |
| SDB 0132 | en | Clutch Handle Rigging | 12/09/2021 | |
| SDB 0132 | 1 | en | Clutch Handle Rigging | 11/21/2023 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SDB T-001 | en | Cancelled Possible Ingestion of Inlet Duct Boots | 02/16/2000 | |
| SDB T-002 | A | en | Main Rotor Gearbox, P/N 4130020, Cracked Ring Gear Carrier | 12/04/1996 |
| SDB T-003 | en | Possible Interference Involving Main Rotor Pitch Change Bellcrank (Cyclic Walking Beam), P/N 28-14207-101 | 06/06/1996 | |
| SDB T-004 | en | Incorrect Length Horizontal Stabilizer Cap Screw | 06/11/1996 | |
| SDB T-005 | en | Cancelled Replacement of Lower Pulley Bearings, P/N ECD-4018 | 08/25/2010 | |
| SDB T-005 | B | en | Replacement of Lower Pulley Bearings, P/N ECD-4018 | 12/22/1997 |
| SDB T-006 | en | Cracked Isolation Mount Weldment | 02/13/1997 | |
| SDB T-007 | en | Cracks in Lower Swashplate Universal Housing, P/N 4140535-11 | 05/28/1997 | |
| SDB T-008 | en | Cracked Oil Cooler Blower Short Shaft, P/N 4129102 | 05/28/1997 | |
| SDB T-008 | 3 | en | Cracked Oil Cooler Blower Short Shaft, P/N 4129102 | 05/27/2016 |
| SDB T-009 | en | Fuel Shutoff Valve Modification | 10/03/1997 | |
| SDB T-010 | en | Cancelled Swashplate Inspection | 02/16/2000 | |
| SDB T-011 | en | Cancelled Possible Ingestion of Bellmouth Engine Inlet Seal | 02/16/2000 | |
| SDB T-012 | en | Tail Rotor Gearbox Input Seal | 10/16/1998 | |
| SDB T-012 | 1 | en | Tail Rotor Gearbox Input Seal | 01/07/2014 |
| SDB T-013 | 2 | en | Cracked Oil Cooler Blower Shaft Flex Packs | 09/05/2002 |
| SDB T-014 | 1 | en | Lanyard Installation for Tailcone Vibration Absorber | 10/06/2000 |
| SDB T-015 | en | Replacement of Low Point Drain Valve | 10/06/2000 | |
| SDB T-016 | en | Oil Cooler Impeller Assembly Inspection | 02/15/2002 | |
| SDB T-017 | en | Lower Pulley Drive System Inspection | 01/15/2003 | |
| SDB T-017 | en | Cancelled Lower Pulley Drive System Inspection | 08/25/2010 | |
| SDB T-018 | en | H-Strut Inspection | 06/16/2003 | |
| SDB T-019 | en | Main Rotor Push-Pull Rod Inspection | 09/10/2003 | |
| SDB T-019 | 1 | en | Main Rotor Push-Pull Rod Inspection | 02/15/2019 |
| SDB T-019 | 2 | en | Main Rotor Push-Pull Rod Inspection | 04/02/2019 |
| SDB T-020 | en | Inspection of Pylon Assembly for Cracks | 08/18/2005 | |
| SDB T-021 | en | Installation of Oleo Condition Placards | 08/25/2005 | |
| SDB T-022 | en | Overrunning Clutch Oil Level | 12/23/2005 | |
| SDB T-023 | en | Incorrect Marking of ECD002-11 Bearing Set | 02/03/2006 | |
| SDB T-023 | en | Cancelled Incorrect Marking of ECD002-11 Bearing Set | 08/25/2010 | |
| SDB T-024 | en | Inspect Swashplate Rod End (Dog Leg) Assembly, P/N 28-16143-1, for Excessive Play/Wear | 04/28/2006 | |
| SDB T-025 | en | Inspect Main Rotor Control Rods, P/N 4140532-5, for Loose Upper Fittings | 05/23/2006 | |
| SDB T-026 | en | Power Output Shaft Bearing Inspection | 06/01/2006 | |
| SDB T-026 | 1 | en | Power Output Shaft Bearing Inspection | 02/14/2014 |
| SDB T-027 | en | Overrunning Clutch Cover Equipped with a Sight Plug | 09/05/2006 | |
| SDB T-027 | 1 | en | Overrunning Clutch Cover Equipped with a Sight Plug | 01/07/2008 |
| SDB T-028 | 1 | en | Turbine Engine Assembly - Steady State Operation Avoidance Range Limit | 03/20/2007 |
| SDB T-028 | 2 | en | Turbine Engine Assembly - Steady State Operation Avoidance Range Limit | 05/24/2016 |
| SDB T-029 | en | Hinge Pins (Main Rotor Blade Retention Pins), P/N 28-14007-3, Manufactured from Incorrect Specification Material | 03/20/2007 | |
| SDB T-030 | en | Inspection of Circuit Breaker Bus Bar Installation | 05/14/2007 | |
| SDB T-031 | en | Inspection of Horizontal Stabilizer Aft Spar Bolt Engagement | 10/18/2007 | |
| SDB T-032 | en | Tail Rotor Cable Clearance | 07/25/2008 | |
| SDB T-033 | en | Inspection of Tailcone Skins, Flanges and Longerons | 07/16/2008 | |
| SDB T-033 | 1\ | en | Inspection of Tailcone Skins, Flanges and Longerons | 12/23/2009 |
| SDB T-034 | en | Possible Interference Involving Main Rotor Pitch Change Bellcrank (Cyclic Walking Beam) | 10/13/2008 | |
| SDB T-035 | en | Main Rotor Pitch Change Bellcranks Missing Chamfers (Clarification) | 11/03/2008 | |
| SDB T-036 | en | Drive System Flex Packs (Clarification) | 01/28/2009 | |
| SDB T-036 | 1 | en | Drive System Flex Packs | 12/12/2023 |
| SDB T-037 | en | Drive Belt Clearance | 11/20/2009 | |
| SDB T-038 | en | Engine Mount Inspection (P/N 4120012-11/-12) | 02/26/2010 | |
| SDB T-038 | 1 | en | Engine Mount Inspection (P/N 4120012-11/-12) | 05/05/2011 |
| SDB T-039 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 02/07/2011 | |
| SDB T-039 | 1 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 03/29/2011 |
| SDB T-039 | 2 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 05/16/2011 |
| SDB T-039 | 3 | en | Cyclic Trim System - Cyclic Trim Assembly Kit for Lateral and Longitudinal Trim Actuator Assemblies | 07/06/2011 |
| SDB T-040 | en | Cyclic Trim Actuator Switch Assembly Inspection | 09/26/2011 | |
| SDB T-041 | en | Mounting Hardware Inspection | 11/28/2011 | |
| SDB T-042 | en | Cyclic and Collective Control Tubes and Stop Ring Assembly Inspections | 12/05/2011 | |
| SDB T-042 | 1 | en | Cyclic and Collective Control Tubes and Stop Ring Assembly Inspections | 06/28/2012 |
| SDB T-042 | 2 | en | Cyclic and Collective Control Tubes and Stop Ring Assembly Inspections | 11/07/2017 |
| SDB T-043 | en | Trim Relay Replacement | 01/09/2013 | |
| SDB T-045 | en | Copilot Collective - Retention Pin Installation | 01/07/2014 | |
| SDB T-045 | 1 | en | Copilot Collective - Retention Pin Installation | 06/25/2014 |
| SDB T-046 | en | Main Rotor Drive Belt | 07/07/2014 | |
| SDB T-046 | 1 | en | Main Rotor Drive Belt | 05/12/2015 |
| SDB T-046 | 2 | en | Main Rotor Drive Belt | 01/11/2017 |
| SDB T-046 | 3 | en | Main Rotor Drive Belt | 11/07/2017 |
| SDB T-047 | en | Tail Rotor Drive Shaft Bearing Assembly | 09/25/2014 | |
| SDB T-048 | en | Engine Idle Stop Assembly, P/N 4167370-1 | 09/18/2014 | |
| SDB T-049 | en | Overrunning Clutch Assembly | 11/06/2014 | |
| SDB T-050 | en | Main Rotor Spindle (Lamiflex), P/N 28-14282-13 | 02/11/2015 | |
| SDB T-050 | 1 | en | Main Rotor Spindle (Lamiflex), P/N 28-14282-13 | 04/01/2015 |
| SDB T-050 | 2 | en | Main Rotor Spindle (Lamiflex), P/N 28-14282-13 | 06/01/2015 |
| SDB T-050 | 3 | en | Main Rotor Spindle (Lamiflex), P/N 28-14282-13 | 06/24/2016 |
| SDB T-051 | en | Fuel Tank Inspection | 02/16/2015 | |
| SDB T-052 | en | Electrical System - Engine Idle Stop Wiring Inspection | 11/16/2015 | |
| SDB T-053 | en | Particle Separator Assembly, Rivet Inspection | 11/02/2016 | |
| SDB T-054 | en | Lamiflex Bearing Inspection (P/N 28-14320-15) | 02/03/2017 | |
| SDB T-055 | en | Tail Rotor Rotating Controls Installation Inspection | 04/07/2017 | |
| SDB T-056 | en | Shoulder Harness Attachment Inspection | 05/19/2017 | |
| SDB T-057 | en | Fuel Quantity Transmitter - Cover and Gasket | 07/06/2017 | |
| SDB T-058 | en | Rod End Inspection | 08/02/2017 | |
| SDB T-058 | 1 | en | Rod End Inspection | 06/20/2018 |
| SDB T-059 | en | Fuel Quantity Indicator Identification | 08/02/2017 | |
| SDB T-060 | en | Fiberglass Procedure for Upper Plenum/Air Inlet Hand Holds and Nutplate Rivets | 05/24/2018 | |
| SDB T-060 | 1 | en | Fiberglass Procedure for Upper Plenum/Air Inlet Hand Holds and Nutplate Rivets | 09/05/2018 |
| SDB T-061 | 1 | en | Lower Air Plenum Assembly Wedge Vane | 10/29/2019 |
| SDB T-062 | en | Drag Strut Assembly Inspection | 08/27/2019 | |
| SDB T-062 | 1 | en | Drag Strut Assembly Inspection | 02/03/2020 |
| SDB T-062 | 2 | en | Drag Strut Assembly Inspection | 06/05/2020 |
| SDB T-063 | en | Cargo Hook Extension Link Inspection | 09/10/2019 | |
| SDB T-064 | en | Tailcone Bulkhead Inspection | 08/25/2020 | |
| SDB T-065 | en | Transmission Mount - Pylon Joint Cracks | 10/13/2020 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SIL 0194 | en | Tail Rotor Transmission (Gearbox), Premature Gear Wear | 06/24/2025 | |
| SIL T-076 | en | Tail Rotor Transmission (Gearbox), Premature Gear Wear | 06/24/2025 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SIL 0001 | en | Engine Crankcase Vent | 02/29/1968 | |
| SIL 0002 | en | Fuel Line | 02/29/1968 | |
| SIL 0003 | en | Cancelled Taper Pins - Tail Rotor Drive Shaft | 10/06/2000 | |
| SIL 0004 | en | Cancelled Bolts - Rotor Damper Attachment | 09/11/2000 | |
| SIL 0005 | en | Exhaust Stack Cracks | 02/10/1969 | |
| SIL 0006 | en | Damper Rod End Jam Nut Lockwasher | 02/12/1969 | |
| SIL 0007 | en | Inspection of Cabin Door Handle Attachment Pins | 02/12/1969 | |
| SIL 0008 | en | Cancelled Component Service Life | 09/11/2000 | |
| SIL 0009 | en | Belt Idler Shaft | 06/04/1969 | |
| SIL 0010 | en | Cancelled Replacement of Washers on 28-13236 Actuator Arm | 10/06/2000 | |
| SIL 0011 | en | Cancelled Belt Tension Field Adjustment | 09/11/2000 | |
| SIL 0012 | en | Roll Pin - Friction Lock Handle - Collective Control | 09/19/1969 | |
| SIL 0013 | en | Inlet Air Ducting | 09/25/1969 | |
| SIL 0014 | A | en | Proper Lubrication of Lower Jack Strut Bearing | 05/11/1973 |
| SIL 0015 | en | Chafing of Pressure and Vent Lines, Main Cabin Area | 12/19/1969 | |
| SIL 0016 | 1 | en | Removal of Alternator Cooling Fan | 10/06/2000 |
| SIL 0017 | en | Inspection of Tail Rotor Teetering Hinge Bearings | 04/14/1970 | |
| SIL 0018 | en | Inspection of 28-11222 Stabilizer Attachment Tube | 05/05/1970 | |
| SIL 0019 | en | Inspection of Tail Rotor Gearbox Housing Drawing No. 28-13502F | 11/13/1970 | |
| SIL 0020 | en | Revision to Electrical Distribution System | 02/18/1971 | |
| SIL 0021 | en | Inlet Air Ducting | 04/13/1971 | |
| SIL 0022 | en | R.F. Interference with Engine Instrument Cluster | 04/30/1971 | |
| SIL 0023 | en | Cancelled Compliance of Service Letter #0016 Survey | 10/06/2000 | |
| SIL 0024 | en | Main Rotor Blade Leading Edge Protection | 09/24/1971 | |
| SIL 0025 | en | Rod End Assembly - P/N 28-16143 - Swash Plate Assembly | 06/26/1972 | |
| SIL 0026 | en | Safety Lock Washer on Damper Rod End | 05/18/1972 | |
| SIL 0027 | A | en | Inspection of Over-Center Mount Pad 28-11100-83 | 04/30/1974 |
| SIL 0028 | en | Cancelled Belt Engagement Over-Centering Capsule Adjustment | 10/06/2000 | |
| SIL 0029 | en | Cancelled Oil Filler Cap Assembly - Main Rotor Gearbox | 10/06/2000 | |
| SIL 0030 | en | Collective Control Assembly (Pilot Stick) | 10/10/1972 | |
| SIL 0031 | en | Collective Friction Lock Assembly | 05/31/1973 | |
| SIL 0032 | en | Field Phasing of Main Rotor Controls by Field Mechanics | 06/04/1973 | |
| SIL 0033 | en | Blade Damper Bleeding Procedure | 07/25/1973 | |
| SIL 0034 | en | Abnormal Airframe Vibration | 09/20/1973 | |
| SIL 0035 | en | Field Installation of Tail Rotor Blades to Splined Tail Rotor Output Shaft | 12/17/1973 | |
| SIL 0036 | en | Oil Sump Quick Drain Hose Assemblies | 02/04/1974 | |
| SIL 0037 | A | en | Inspection of Spindle Nylatron Sleeve | 10/01/1983 |
| SIL 0038 | en | Lubrication of Seal | 03/14/1974 | |
| SIL 0039 | en | Setting Autorotative RPM | 05/22/1974 | |
| SIL 0040 | en | Eligibility for Certification in UK | 05/30/1974 | |
| SIL 0041 | en | Cancelled Pulley Alignment & Idler Tracking | 10/06/2000 | |
| SIL 0042 | en | Recommended Procedure for Operation of Ground Handling Wheels | 01/17/1975 | |
| SIL 0043 | en | Inspection of 28-16192 and 28-16339 Push-Pull Control Rods | 02/20/1975 | |
| SIL 0044 | en | Eligibility for Certification in Republic of West Germany | 03/09/1979 | |
| SIL 0045 | en | Possible Interference of Blade Grip and Spindle | 08/11/1975 | |
| SIL 0046 | en | Damper Modification | 03/19/1976 | |
| SIL 0047 | en | Title Changes for Service Communications | 03/11/1976 | |
| SIL 0048 | en | Foam Tape Separation from Cooling Fan Shroud | 03/30/1976 | |
| SIL 0049 | en | Cancelled "C" Model Factory Conversions | 06/14/1976 | |
| SIL 0050 | en | Limit Range on Rotor Tachometer | 01/21/1976 | |
| SIL 0051 | en | Improved Teetering Bearing | 01/27/1977 | |
| SIL 0052 | en | Improved Narrow-Chord Tail Rotor Spindle Design | 01/27/1977 | |
| SIL 0053 | en | Cancelled Low Rotor RPM Warning Unit | 10/18/2023 | |
| SIL 0054 | en | Induction System Hose Clamps | 01/27/1977 | |
| SIL 0054 | 1 | en | Induction System Hose Clamps | 04/07/2017 |
| SIL 0055 | en | Cancelled Main Rotor Damper Fatigue Life | 10/18/2023 | |
| SIL 0056 | en | Tail Rotor Input Shaft Nut Torque | 01/27/1977 | |
| SIL 0057 | en | Main Rotor Gearbox Retention Bolts | 01/27/1977 | |
| SIL 0058 | en | Cancelled Fatigue Retirement Lives | 10/18/2023 | |
| SIL 0059 | en | Inspection and Packing of Sealed Bearings | 02/15/1977 | |
| SIL 0060 | en | Instructions for Obtaining Reworked Tail Rotor Spindle and New Teeter Stop | 03/10/1977 | |
| SIL 0061 | en | Helicopter Weight and Balance Fulcrum | 04/25/1977 | |
| SIL 0062 | en | Fuel Line Insulation (Lagging) | 06/22/1977 | |
| SIL 0063 | en | Improved Turbocharger Oil Inlet Adapter | 05/27/1977 | |
| SIL 0064 | en | Idler Stabilizer Installation Kit | 06/01/1977 | |
| SIL 0065 | en | Eligibility for General Purpose Certification in UK | 06/02/1977 | |
| SIL 0066 | en | Eligibility for General Purpose Certification in UK | 06/02/1977 | |
| SIL 0067 | en | Configuration of Helicopters Delivered to Australia | 07/27/1977 | |
| SIL 0068 | en | Oleo Boot Kit | 08/23/1977 | |
| SIL 0069 | en | Engine Troubleshooting Procedures for Turbo Installations and Idle Adjustments to Correct Engine Roughness and/or Inadvertent Stoppage | 10/07/1977 | |
| SIL 0070 | en | Eligibility for General Purpose Certification in UK | 02/20/1979 | |
| SIL 0071 | en | Cancelled Cancellation Notice | 11/21/2023 | |
| SIL 0072 | en | Eligibility for Certification in Republic of West Germany | 05/01/1978 | |
| SIL 0073 | A | en | O-Ring Main Rotor Retention Assembly, Reference Service Information Letter No. 0073 | 05/24/1979 |
| SIL 0074 | en | Drive Belt Inspection Requirements | 12/12/1978 | |
| SIL 0074 | 1 | en | Drive Belt Inspection Requirements | 07/24/2007 |
| SIL 0074 | 2 | en | Drive Belt Inspection Requirements | 04/27/2016 |
| SIL 0074 | 3 | en | Drive Belt Inspection Requirements | 11/21/2023 |
| SIL 0075 | A | en | Main Rotor Blade Damper | 11/20/1980 |
| SIL 0076 | en | Cancelled Main Rotor Transmission Mounting Hardware | 11/21/2023 | |
| SIL 0077 | en | Torque, Main Rotor Transmission, Pinion Shaft Nut SLN 3045 | 12/12/1978 | |
| SIL 0078 | en | Fire Wall Inspection | 12/13/1978 | |
| SIL 0079 | A | en | Over-Running Clutch Lubrication | 02/14/1980 |
| SIL 0080 | 2 | en | Clutch Control & Belt Tension Inspection & Rigging Procedure | 03/28/2025 |
| SIL 0080 | A | en | Clutch Control & Belt Tension Rigging Procedure | 08/04/1982 |
| SIL 0081 | en | Inspection of Turbocharger for Oil Leakage between Bearing Housing Flange and Bearing Housing | 12/12/1978 | |
| SIL 0082 | en | Replacement Oil Lines | 12/13/1978 | |
| SIL 0083 | en | Modification to Static Vent System | 12/14/1978 | |
| SIL 0084 | en | Inspection, Pinion Shaft Run-Out | 12/19/1978 | |
| SIL 0085 | en | Recommended Transmission Overhaul Interval | 12/19/1978 | |
| SIL 0086 | en | Tail Rotor Rigging Tool Markings (T-0080) | 03/05/1979 | |
| SIL 0087 | en | Tail Rotor Blade Bearing Inspection & Lubrication | 03/06/1979 | |
| SIL 0088 | 2 | en | Special Inspection for Main and/or Tail Rotor Blade Strike/Sudden Stoppage | 11/13/2019 |
| SIL 0088 | A | en | Special Inspection for Main and/or Tail Rotor Blade Strike/Sudden Stoppage | 08/06/1980 |
| SIL 0089 | en | Inspection of Main Rotor Blade Leading Edge Tape | 01/22/1979 | |
| SIL 0090 | en | Fuel Nozzle Air Vent Modification | 05/23/1979 | |
| SIL 0091 | A | en | Modification to Engine Starting System | 09/26/1980 |
| SIL 0092 | en | Monitoring EGT System | 02/14/1980 | |
| SIL 0093 | en | Starter Ring Gear Clearance | 02/13/1980 | |
| SIL 0094 | en | Preflight Control System Check | 02/25/1980 | |
| SIL 0095 | en | Corrosion on Main and Tail Rotor Blades | 07/17/1980 | |
| SIL 0096 | en | Inspection of P/N 28-12462 Fuel Lines | ||
| SIL 0097 | en | Cancelled Life Limit on Lamiflex Bearing | 11/21/2023 | |
| SIL 0097 | en | Life Limit on Lamiflex Bearing | 07/01/1980 | |
| SIL 0098 | en | Turbocharger Gasket Replacement | 08/06/1980 | |
| SIL 0099 | en | Corrosion Control on Low Usage Aircraft | 08/06/1980 | |
| SIL 0100 | en | Main Rotor Flapping Bearing Lubrication | 08/06/1980 | |
| SIL 0101 | en | Position and Strobe Light Assembly Light Shields | 08/18/1980 | |
| SIL 0102 | en | Tail Rotor Teeter Bearing P/N KRP8A-C | 09/26/1980 | |
| SIL 0103 | en | Improved Overrunning Clutch | 11/13/1980 | |
| SIL 0104 | en | Installation of Stainless Steel Tape for Rotor Blade Corrosion and Erosion Protection | 11/13/1980 | |
| SIL 0105 | en | Change of Retard Timing on Bendix D-2000/3000 Shower of Sparks Magnetos | 11/13/1980 | |
| SIL 0106 | en | Cockpit Mixture Control Friction Adjustment | 11/13/1980 | |
| SIL 0107 | en | Solar Shield Availability | 10/06/1980 | |
| SIL 0108 | en | Improved Lower Jack Strut | 03/17/1981 | |
| SIL 0109 | en | Slinger Rings for Rain Protection on Main Rotor Shaft and Tail Rotor Input Shaft | 03/10/1981 | |
| SIL 0110 | B | en | Swashplate Lubrications | 03/18/1993 |
| SIL 0111 | en | Improved Engine Starting Characteristics | 03/11/1981 | |
| SIL 0112 | en | Tolerance Fit on Main Rotor Gearbox Pinion Drive Key | 04/02/1981 | |
| SIL 0112 | 1 | en | Tolerance Fit on Main Rotor Gearbox Pinion Drive Key | 03/14/2018 |
| SIL 0113 | en | Landing Light Modification | 04/23/1981 | |
| SIL 0114 | en | Recommended Optional Safety Equipment | 04/28/1981 | |
| SIL 0115 | en | Improved Main Rotor Blade Damper | 03/09/1981 | |
| SIL 0116 | 4 | en | Service Life Limits | 01/02/2001 |
| SIL 0116 | 5 | en | Service Life Limits | 10/14/2008 |
| SIL 0116 | 6 | en | Service Life Limits | 09/12/2011 |
| SIL 0116 | 7 | en | Service Life Limits | 06/07/2012 |
| SIL 0116 | 8 | en | Service Life Limits | 11/13/2019 |
| SIL 0117 | en | Hot Weather Auxiliary Oil Cooler Kit | 08/26/1981 | |
| SIL 0118 | en | Engine Lubricating Oil - Recommendations for all Temperature Operation | 08/26/1981 | |
| SIL 0119 | en | Internal Timing of 2200/3300 Series Dual Bendix Magneto with Shower of Sparks | 12/02/1981 | |
| SIL 0120 | en | Teeter Bearing Lubrication and Inspection | 12/02/1981 | |
| SIL 0121 | en | Troubleshooting & Tracking Enstrom Articulated Rotor System | 12/02/1981 | |
| SIL 0122 | en | Improved Starter Installation | 04/14/1982 | |
| SIL 0123 | en | Improved Oil Cooler Access | 04/14/1982 | |
| SIL 0124 | en | Fuel System Ice Prevention | 04/14/1982 | |
| SIL 0125 | en | Change of Overboost Warning System | 07/27/1982 | |
| SIL 0126 | en | Inspection of Flapping Bearing Preload and Condition | 07/27/1982 | |
| SIL 0127 | A | en | Preventive Maintenance of Main and Tail Rotor Blades for Corrosion Control in Field | 12/15/1987 |
| SIL 0128 | en | Cancelled Minor Design Change Affecting Usage in Sets of Lamiflex Thrust Bearings | 11/21/2023 | |
| SIL 0129 | en | Minor Maintenance & Repair of Main & Tail Rotor Blades | 11/12/1982 | |
| SIL 0130 | en | Eligibility for Normal Category 2600 Pound Gross Weight | 10/01/1984 | |
| SIL 0131 | en | Engine Damage from Improper Operation | 10/01/1984 | |
| SIL 0132 | en | Cancelled Tail Rotor Drive Flex Couplings Inspection and Service Life | 03/06/2000 | |
| SIL 0133 | en | Installation of Matched Angular Contact Bearings in Tail Rotor Retention Systems | 06/08/1987 | |
| SIL 0134 | en | Eligibility for Certification in UK | 12/16/1988 | |
| SIL 0135 | en | Eligibility for Certification in UK | 12/16/1988 | |
| SIL 0136 | en | Applicability of Lubrication Engineering Greases, Almagard 3751 and Almaplex 1275 | 10/18/1989 | |
| SIL 0137 | en | Authorized Lubrication and Fuels Specifications | 09/11/1985 | |
| SIL 0137 | en | Cancelled Authorized Lubrication and Fuels Specifications | 09/25/2012 | |
| SIL 0138 | en | Pinion Nut Torque and Upper Jack Strut Bearing Adaptor Inspection | 09/11/1985 | |
| SIL 0139 | en | Inspection of Rotor Tachometer Drive Belts | 09/11/1985 | |
| SIL 0139 | 1 | en | Inspection of Rotor Tachometer Drive Belts | 10/14/2008 |
| SIL 0140 | en | Inspection and Proper Installation of Seat Belts | 09/11/1985 | |
| SIL 0141 | en | New Improved Tail Rotor Teeter Bearing Assembly | 09/11/1995 | |
| SIL 0141 | 1 | en | New Improved Tail Rotor Teeter Bearing Assembly | 12/02/2024 |
| SIL 0142 | 1 | en | New Tail Rotor Assembly Bumpers | 02/15/2002 |
| SIL 0142 | 1 | en | Cancelled New Tail Rotor Assembly Bumpers | 05/17/2024 |
| SIL 0143 | en | Inadvertent Trim Motor Operation on 24 Volt D.C. Systems | 05/28/1997 | |
| SIL 0144 | en | Main and Tail Rotor Transmission Chip Indications on New or Recently Overhauled Transmissions | 10/03/1997 | |
| SIL 0145 | en | Vibration and/or Main Rotor Tracking Problems on F-28/280C, F-28C-2, and F-28/280F Helicopters Equipped with Floats, and/or Operating at Gross Weights Exceeding 2350 Pounds, or Operating with Large Lateral Moment Arm | 10/03/1997 | |
| SIL 0146 | en | Improved Main Rotor Control Rod Assembly | 10/03/1997 | |
| SIL 0147 | en | Modified Flapping Bearing Installation Procedure | 12/11/1997 | |
| SIL 0147 | 1 | en | Modified Flapping Bearing Installation Procedure | 05/29/2015 |
| SIL 0148 | en | Low Rotor Speed Warning Switch | 03/31/1999 | |
| SIL 0149 | en | Lamiflex Bearing, P/N 28-14320-15, Usage | 05/03/1999 | |
| SIL 0150 | 1 | en | New Lower Swashplate Assembly, P/N 28-16101-939 | 03/06/2000 |
| SIL 0150 | 2 | en | Lower Swashplate Assembly, P/N 28-16101-101 | 02/18/2025 |
| SIL 0151 | en | Low Rotor Warning Tone Generator "Shelf Life" | 03/06/2000 | |
| SIL 0152 | en | Belt Tension Adjustment and Idler Pulley Alignment | 05/31/2001 | |
| SIL 0152 | 1 | en | Idler Pulley Alignment & Snubber Roller Adjustment | 03/28/2025 |
| SIL 0153 | en | Tail Rotor Assembly, P/N 28-150000, Configurations | 02/15/2002 | |
| SIL 0154 | en | Starter Circuit Wiring Modification | 09/05/2002 | |
| SIL 0155 | 1 | en | Drive Belt Compound Change | 09/10/2003 |
| SIL 0156 | en | Main Rotor Push-Pull Rod, P/N 28-16253-"X", Serviceability Inspection Criteria | 12/09/2003 | |
| SIL 0157 | en | Installation Torque for Main Rotor Damper Relief Valve, P/N 28-14367-7 | 01/31/2005 | |
| SIL 0158 | en | Fixed Length Tail Rotor Pitch Change Link, P/N 28-16391-1 | 01/31/2005 | |
| SIL 0159 | en | F-28A and 280 Left Side Tail Rotor Installation | 01/31/2005 | |
| SIL 0160 | en | Modified Procedure for Attaching Main Rotor Control Rods to Lower Swashplate Assembly | 10/30/2006 | |
| SIL 0161 | en | Main Rotor Damper Oil Part Number | 05/04/2007 | |
| SIL 0162 | en | Tail Rotor Thrust Bearings, P/N ECD002-11 | 05/08/2007 | |
| SIL 0162 | 1 | en | Tail Rotor Thrust Bearings, P/N ECD002-11 | 11/21/2023 |
| SIL 0163 | en | Turbocharger Adapter Assembly | 07/24/2007 | |
| SIL 0163 | 1 | en | Turbocharger Adapter Assembly | 04/02/2019 |
| SIL 0164 | en | Cyclic Trim System Configurations | 07/24/2007 | |
| SIL 0165 | en | Tail Rotor P/C Link Installation Inspection | 10/19/2007 | |
| SIL 0165 | 2 | en | Tail Rotor P/C Link Installation Inspection | 05/12/2015 |
| SIL 0165 | 3 | en | Tail Rotor P/C Link Installation Inspection | 04/07/2017 |
| SIL 0165 | 4 | en | Tail Rotor P/C Link Installation Inspection | 11/10/2017 |
| SIL 0166 | en | Main Rotor Gearbox Bolt Retorque | 05/21/2008 | |
| SIL 0167 | en | Sliding Window Installation | 11/25/2008 | |
| SIL 0167 | 1 | en | Sliding Window Installation | 01/05/2010 |
| SIL 0168 | en | Grease Recommendations for Rotor System Bearings | 01/20/2009 | |
| SIL 0169 | en | Identifying Corrosion Severity Zone for Operating Environment | 04/28/2009 | |
| SIL 0170 | en | Application of Corrosion Prevention Compound | 03/22/2010 | |
| SIL 0171 | en | Proper Servicing of Fuel Filter Screen | 03/26/2012 | |
| SIL 0172 | en | Blade Tape Repair | 01/20/2011 | |
| SIL 0173 | en | Pylon Structure Inspection for Agricultural and External Load Aircraft | 09/02/2010 | |
| SIL 0174 | en | Blade Interchangeability and Identification | 01/20/2011 | |
| SIL 0175 | en | Turbocharger Adapter Assembly | 04/08/2011 | |
| SIL 0175 | 1 | en | Turbocharger Adapter Assembly | 12/12/2023 |
| SIL 0176 | en | Alternative Lubrication Method for ECD016 and ECD018 Bearings | 07/11/2011 | |
| SIL 0177 | en | Main Rotor System Tracking | 08/19/2011 | |
| SIL 0178 | en | Upper Swashplate Bearing Housing Configurations | 04/15/2014 | |
| SIL 0179 | en | Copilot Flight Controls Removal | 12/05/2011 | |
| SIL 0179 | 1 | en | Copilot Flight Controls Removal | 12/20/2017 |
| SIL 0181 | en | Cancelled Production Certificate Reissue | 10/14/2024 | |
| SIL 0181 | en | Production Certificate Reissue | 04/15/2014 | |
| SIL 0182 | en | Fuel Management - Dipstick Use and Fuel Samples | 03/17/2015 | |
| SIL 0182 | 1 | en | Fuel Management - Dipstick Use and Fuel Samples | 11/07/2017 |
| SIL 0183 | en | Collective Stick Socket Replacement | 08/19/2015 | |
| SIL 0184 | en | Collective Trim Adjustment Rod Assembly, P/N 28-16242 | 03/21/2016 | |
| SIL 0184 | 1 | en | Collective Trim Adjustment Rod Assembly, P/N 28-16242 | 11/20/2017 |
| SIL 0184 | 2 | en | Collective Trim Adjustment Rod Assembly, P/N 28-16242 | 12/20/2018 |
| SIL 0184 | 3 | en | Collective Trim Adjustment Rod Assembly, P/N 28-16242 | 05/16/2023 |
| SIL 0185 | en | CHT Probe Installation | 05/19/2016 | |
| SIL 0186 | en | Wastegate Linkage and Throttle Cable Installations | 03/30/2016 | |
| SIL 0187 | en | Universal Block, P/N 28-14117-11 | 11/09/2016 | |
| SIL 0187 | 1 | en | Universal Block, P/N 28-14117-11 | 04/02/2024 |
| SIL 0188 | en | Oil Pressure Gauge, Troubleshooting | 12/01/2016 | |
| SIL 0189 | en | Magneto Retard Terminal P-Lead Insulator | 02/04/2019 | |
| SIL 0190 | en | Cabin Door Removal | 04/02/2019 | |
| SIL 0191 | en | Lamiflex Bearing Discontinuation | 08/14/2019 | |
| SIL 0192 | en | Tail Rotor Cable Assembly | 12/09/2019 | |
| SIL 0193 | 1 | en | Tail Rotor Gearbox, Oil Level Check and Servicing | 05/09/2023 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SIL T-001 | en | Generator Switch Operation | 09/11/1995 | |
| SIL T-002 | 4 | en | Service Life Limits | 09/10/2003 |
| SIL T-002 | 5 | en | Service Life Limits | 03/22/2010 |
| SIL T-002 | 6 | en | Service Life Limits | 05/10/2013 |
| SIL T-002 | 7 | en | Service Life Limits | 04/15/2014 |
| SIL T-002 | 8 | en | Service Life Limits | 01/04/2016 |
| SIL T-003 | en | Engine Oil Warning Placard | 06/21/1996 | |
| SIL T-004 | en | Cancelled Improved Tail Rotor Feathering Axis Bumper, P/N 28-15033-13 | 02/15/2002 | |
| SIL T-005 | en | Cancelled Main and Tail Rotor Transmission Chip Indications on New or Recently Overhauled Transmissions | 02/16/2000 | |
| SIL T-006 | en | Improved Fuel Shutoff Valve Operation | 10/03/1997 | |
| SIL T-007 | en | Drain Hole Installation in Cabin Doors | 12/11/1997 | |
| SIL T-008 | en | Alternative Spar Fitting Attachment | 12/10/1998 | |
| SIL T-009 | en | Cancelled Allison Engine 250-C20W | 02/15/2002 | |
| SIL T-010 | en | Cancelled Cyclic Stick Socket Installation Repair | 02/16/2000 | |
| SIL T-011 | en | Main Electrical Relays | 03/31/1999 | |
| SIL T-012 | en | Main Rotor Transmission Pinion Nut Retorque | 03/31/1999 | |
| SIL T-013 | en | Serialization of Vibration Absorber Beams | 04/06/1999 | |
| SIL T-014 | en | Generator Control Unit Relocation | 03/20/2000 | |
| SIL T-015 | en | Tail Rotor Transmission Identification | 02/15/2002 | |
| SIL T-016 | en | Drive Belt Tension | 02/15/2002 | |
| SIL T-017 | en | Electrical System Pylon Grounds | 09/05/2002 | |
| SIL T-018 | en | Fuel Cell Leaks | 06/16/2003 | |
| SIL T-019 | en | Main Rotor Push-Pull Rod, P/N 4140532-"X", Serviceability Inspection Criteria | 12/09/2003 | |
| SIL T-020 | en | Fixed Length Tail Rotor Pitch Change Link, P/N 28-16391-1 | 01/31/2005 | |
| SIL T-021 | en | Elastomeric Main Rotor Damper Kit | 01/31/2005 | |
| SIL T-022 | en | Oil Lubricated Lower Pulley Bearings | 01/31/2005 | |
| SIL T-023 | en | Modified Procedure for Attaching Main Rotor Control Rods to Lower Swashplate Assembly | 10/30/2006 | |
| SIL T-024 | en | Engine Cooling Kit | 05/02/2007 | |
| SIL T-025 | en | Main Rotor Damper Oil Part Number | 05/04/2007 | |
| SIL T-026 | en | Tail Rotor Thrust Bearings, P/N ECD002-11 | 05/08/2007 | |
| SIL T-027 | en | Tail Rotor P/C Link Installation Inspection | 10/18/2007 | |
| SIL T-027 | 1 | en | Tail Rotor P/C Link Installation Inspection | 11/22/2011 |
| SIL T-027 | 2 | en | Tail Rotor P/C Link Installation Inspection | 05/12/2015 |
| SIL T-027 | 3 | en | Tail Rotor P/C Link Installation Inspection | 04/07/2017 |
| SIL T-028 | en | Landing Gear Fairing Assembly | 02/11/2008 | |
| SIL T-028 | 1 | en | Landing Gear Fairing Assembly | 09/05/2018 |
| SIL T-029 | en | Belt Tension and Pulley Alignment Records Log | 03/25/2008 | |
| SIL T-030 | en | Main Rotor Gearbox Bolt Retorque | 05/21/2008 | |
| SIL T-031 | en | Relay Kit Installation | 11/06/2008 | |
| SIL T-032 | en | 600 Hour Inspection Termination for Upper and Lower Swashplate Assemblies and Control Rod Assembly | 11/25/2008 | |
| SIL T-033 | en | Grease Recommendations for Rotor System Bearings | 01/20/2009 | |
| SIL T-034 | en | Sliding Window Installation | 11/25/2008 | |
| SIL T-034 | 1 | en | Sliding Window Installation | 01/05/2010 |
| SIL T-035 | en | Identifying Corrosion Severity Zone for Operating Environment | 05/04/2009 | |
| SIL T-036 | en | Bearing Temperature Warning Unit | 03/19/2010 | |
| SIL T-037 | en | Failure of Engine Drive Shaft Support Bearing (ECD4017), Overrunning Clutch Duplex Support Bearing (ECD4014) and/or P/N 23063426 Double Lip Seals | 10/23/2009 | |
| SIL T-038 | en | Application of Corrosion Prevention Compound | 03/22/2010 | |
| SIL T-039 | en | Hi/Lo Rotor RPM Switch Installation, P/N 4199071 | 03/22/2010 | |
| SIL T-040 | en | Dual Indicating Volt-Ammeter, P/N ECD4041-7 | 03/26/2010 | |
| SIL T-041 | en | Blade Tape Repair | 01/20/2011 | |
| SIL T-041 | 1 | en | Blade Tape Repair | 02/15/2019 |
| SIL T-042 | en | Blade Interchangeability and Identification | 01/20/2011 | |
| SIL T-043 | en | Torque Indication Check Procedure for Maintenance Ground Run and Maintenance Test Flight | 02/17/2011 | |
| SIL T-044 | en | Clarification of Linear Actuator and Droop Compensator Rigging | 02/23/2011 | |
| SIL T-045 | en | Supplemental Information for Restraining Cargo in Cabin | 03/29/2011 | |
| SIL T-046 | en | Lower Drive Retaining Nut Torque Requirement and Washer Replacement | 05/18/2011 | |
| SIL T-047 | en | Alternative, Acceptable Lubrication Method for ECD016-( ) Tail Rotor Pitch Change Bearing | 05/24/2011 | |
| SIL T-048 | en | Retraction Notice, Maintenance Manual Supplement 4, Revision 2 | 06/22/2011 | |
| SIL T-049 | en | Special Inspections for Agricultural Aircraft | 07/07/2011 | |
| SIL T-050 | en | Main Rotor System Tracking | 08/19/2011 | |
| SIL T-051 | en | Vented Clutch Oil Reservoir, Kit P/N 4230001 | 09/20/2011 | |
| SIL T-051 | 1 | en | Vented Clutch Oil Reservoir, Kit P/N 4230001 | 12/22/2011 |
| SIL T-051 | 2 | en | Vented Clutch Oil Reservoir, Kit P/N 4230001 | 11/07/2017 |
| SIL T-052 | en | Scavenge Air and Bleed Line Installation - Clamp Replacement | 10/10/2011 | |
| SIL T-053 | en | Teledyne Gill 7641-20 VRLA (Valve Regulated Lead Acid) Battery | 09/28/2012 | |
| SIL T-053 | 1 | en | Teledyne Gill 7641-20 VRLA (Valve Regulated Lead Acid) Battery | 09/22/2015 |
| SIL T-054 | en | Fuel Cell Foam Baffle Maintenance Instructions | 10/31/2012 | |
| SIL T-054 | 1 | en | Fuel Cell Foam Baffle Maintenance Instructions | 11/16/2022 |
| SIL T-055 | en | T-0192-1 Calibration Reference Bar | 02/04/2013 | |
| SIL T-055 | 1 | en | T-0192-1 Calibration Reference Bar | 04/04/2013 |
| SIL T-056 | en | Upper Swashplate Bearing Housing Configurations | 04/15/2014 | |
| SIL T-057 | en | Breather Tube Assembly | 01/09/2014 | |
| SIL T-058 | en | Inspection and Repair of Minor Cabin Roof Bubbles | 01/23/2014 | |
| SIL T-059 | en | Cancelled Production Certificate Reissue | 10/14/2024 | |
| SIL T-059 | en | Production Certificate Reissue | 04/15/2014 | |
| SIL T-060 | en | AeroLEDs Sunspot 36HX Landing Light Upgrade | 03/07/2014 | |
| SIL T-060 | 1 | en | AeroLEDs Sunspot 36HX Landing Light Upgrade | 05/19/2016 |
| SIL T-060 | 2 | en | AeroLEDs Sunspot 36HX Landing Light Upgrade | 08/21/2019 |
| SIL T-061 | en | Fuel Quantity Transmitter Upgrade | 07/31/2015 | |
| SIL T-061 | 1 | en | Fuel Quantity Transmitter Upgrade | 05/19/2017 |
| SIL T-061 | 2 | en | Fuel Quantity Transmitter Upgrade | 08/07/2017 |
| SIL T-062 | en | Fuel System, Dipstick Tube Removal | 08/20/2015 | |
| SIL T-063 | en | Main Rotor Gearbox Pump Upgrade | 07/08/2015 | |
| SIL T-063 | 1 | en | Main Rotor Gearbox Pump Upgrade | 09/05/2018 |
| SIL T-064 | en | Main Rotor Transmission 600-Hour Inspection | 12/10/2015 | |
| SIL T-065 | en | Bleed Air Restrictor | 03/30/2016 | |
| SIL T-066 | en | Dual Ground Handling Wheel Installation | 06/21/2016 | |
| SIL T-066 | 1 | en | Dual Ground Handling Wheel Installation | 05/19/2017 |
| SIL T-067 | en | Universal Block: P/N 28-14117-11 and P/N 28-14117-13 | 11/09/2016 | |
| SIL T-067 | 1 | en | Universal Block: P/N 28-14117-11 and P/N 28-14117-13 | 04/02/2024 |
| SIL T-067 | 2 | en | Universal Block: P/N 28-14117-11 and P/N 28-14117-13 | 05/01/2024 |
| SIL T-068 | en | EASA Registration of G1000H-Equipped 480B Helicopters | 05/24/2017 | |
| SIL T-069 | en | EASA Registration of GMA 350H-Equipped 480B Helicopters | 05/24/2017 | |
| SIL T-070 | en | Main Rotor Gearbox Pump Upgrade | 09/05/2018 | |
| SIL T-071 | en | Lamiflex Bearing Discontinuation | 08/14/2019 | |
| SIL T-072 | en | G1000H System Loader Card Software Version 1852.05 Release | 12/02/2019 | |
| SIL T-073 | en | Pylon Reinforcement Doubler Installation | 10/13/2020 | |
| SIL T-074 | en | Fuel Cell (Bladder) Assembly | 11/16/2022 | |
| SIL T-074 | 1 | en | Fuel Cell (Bladder) Assembly | 08/12/2024 |
| SIL T-075 | en | Upper Pulley, P/N 4130538-11 | 01/16/2025 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| SN 0011 | en | Taper Pins on Tail Rotor Drive Shaft | 03/29/1972 | |
| SN 0025 | A | en | Main Rotor Hub Retention | 07/31/1975 |
| SN 0027 | en | Over-Running Clutch Assembly - P/N 28-13401 | 12/09/1975 | |
| SN 0029 | en | Tail Cone Attachment Bolts | 12/09/1975 |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| Drive Train | en | How to Install a Magnetic Pick-Up in a MRGB | ||
| Drive Train | en | TRGB Flushing Procedures | 07/13/2016 | |
| Drive Train | en | Taper Pin Size Chart | 11/01/2016 | |
| Drive Train | en | Tail Rotor Gear Box Seal Replacement Input Shaft and Output Shaft Seals | ||
| Drive Train | en | Tail Rotor Drive Shaft Alignment | ||
| Drive Train | en | Seal Replacement - Main Rotor Transmission | ||
| Drive Train | en | Piston Helicopter MRGB Flushing Procedures | 07/13/2016 | |
| Engine | en | Adjusting Correlator | ||
| Engine | en | Engine Fan Dynamic Balancing Procedure (Vibrex 2000 and Enstrom Photocell Bracket, T-0153-1) | ||
| Engine | en | Fire Curtain Repair | ||
| Engine | en | Maintaining Teledyne Bendix D-3200 Series Magneto | 10/08/2018 | |
| Engine | en | Modifying Throttle Cable Sheath Attachment | ||
| Engine | en | Piston Engine Exhaust Leaks | 05/01/2018 | |
| Engine | en | Troubleshooting Information Form (Piston Helicopters) | 03/01/2016 | |
| Engine | en | Using Engine CHT/EGT Display for Diagnosing Problems | 10/01/2008 | |
| Flight Controls | en | Collective Friction Lock Slippage | ||
| Flight Controls | en | Reaming and Installation Procedures for 28-16143-3 Rod Ends (Doglegs) | ||
| Fuel System | en | Field Adjustment of Fuel Servo - F & C | ||
| Fuel System | en | Plugged Fuel Injector Nozzles | ||
| Fuel System | en | Proper Servicing of Fuel Screens | ||
| Landing Gear | en | Ground Bounce (Ground Rock) | ||
| Landing Gear | en | Oleos | ||
| Landing Gear | en | Skid Tube Replacement | ||
| Main Rotor System | en | TT Strap Maintenance Information | 03/01/2016 | |
| Main Rotor System | en | Tracking Main Rotor Blades | 09/26/2013 | |
| Main Rotor System | en | Tracking Blades with Enstrom Rotor System | ||
| Main Rotor System | en | Stick Shake after Servicing | ||
| Main Rotor System | en | Repairing Main Rotor Blade Leading Edge Corrosion | 11/01/2016 | |
| Main Rotor System | en | Purge-Locking Grips | ||
| Main Rotor System | en | Making Clock Angle Corrections & Enstrom Rotor System | ||
| Main Rotor System | en | Main Rotor Blade Track Chart | ||
| Main Rotor System | en | Installing New Pitch Change Bearings | ||
| Main Rotor System | en | Identification/Verification and Component Card Correction of 28-14282-11 or -13 Main Rotor Spindles | ||
| Main Rotor System | en | Ground Bounce (Ground Rock) | ||
| Main Rotor System | en | Clock Angle Corrections and Enstrom Rotor System | ||
| Main Rotor System | en | Bleeding Dampers | ||
| Main Rotor System | en | Blade Tape Repair - 3M 8681HS | ||
| Main Rotor System | en | 28-14117 Universal Block Lower Grease Fitting Installation Procedure | 02/01/2016 | |
| Main Rotor System | en | Instructions to Install Flapping Reservoirs | ||
| Piston Options | en | Float Installation Instructions - P/N 28-17326 | 10/14/2008 | |
| Structures | en | Window Installation | ||
| Structures | en | Tailcone Alignment Work Aid, Using T-0199-1 (Laser Fixture), T-0200-5 (Target) | ||
| Structures | en | Stinger Tube Bracket/Rivet Repair | ||
| Structures | en | Replacing Glass Door | ||
| Structures | en | Repairing Fiberglass Door Fit | ||
| Structures | en | Paint Removal Process & Repairing for Re-Paint | ||
| Structures | en | Installing New Door Cables in F Doors | 02/01/2016 | |
| Structures | en | Adjusting Door Latches on Late F28-F Doors | ||
| Structures | en | 280FX Door Glass Installation | ||
| Tail Rotor System | en | "FM" Tail Rotor Chart | ||
| Tail Rotor System | en | Troubleshooting Tail Rotor Pitch Change Problems | ||
| Tail Rotor System | en | Tracking and Dynamic Balancing - Tail Rotor Assembly | ||
| Tail Rotor System | en | Tail Rotor Spindle Assembly Repair Procedure | 02/02/2016 | |
| Tail Rotor System | en | Tail Rotor Gear Box Seal Replacement | ||
| Tail Rotor System | en | ECD 002 Tail Rotor Grip Bearing Inspection Procedure | ||
| Tail Rotor System | en | Assembling Tail Rotor Spindle Teeter Bearing | ||
| Tail Rotor System | en | Tail Rotor Pitch Change Bearings |
| Name | Revision | Lang | Subject | Date |
|---|---|---|---|---|
| Drive Train | en | Lower Pulley Hot Bearing Light Troubleshooting | ||
| Drive Train | en | TRGB Flushing Procedures | 07/13/2016 | |
| Drive Train | en | Taper Pin Size Chart | 11/01/2016 | |
| Drive Train | en | Tail Rotor Gear Box Seal Replacement Input Shaft and Output Shaft Seals | ||
| Drive Train | en | Tail Rotor Drive Shaft Alignment | ||
| Drive Train | en | Proper Cleaning and Service of Clutch Support and Internal Drive Shaft Support Bearings | 11/01/2016 | |
| Drive Train | en | Over Running Clutch | ||
| Drive Train | en | Lower Pulley Alignment Work Aid and Checklist T-001 | 01/15/2003 | |
| Drive Train | en | How to Install a Magnetic Pick-Up in a MRGB | ||
| Drive Train | en | Checklist for Belt Tension and Pulley Alignment | ||
| Drive Train | en | 480 MRGB Flushing Procedures | 07/13/2016 | |
| Drive Train | 1 | en | Instructions for Use of Tool T-0186 | |
| Engine | en | Clarification of Linear Actuator and Droop Compensator Rigging | 02/23/2011 | |
| Engine | en | Fire Curtain Repair | ||
| Flight Controls | en | Reaming and Installation Procedures for 28-16143-3 Rod Ends (Doglegs) | ||
| Landing Gear | en | Oleos | ||
| Landing Gear | en | Ground Bounce (Ground Rock) | ||
| Landing Gear | en | Skid Tube Replacement | ||
| Main Rotor System | en | Purge-Locking Grips | ||
| Main Rotor System | en | 28-14117 Universal Block Lower Grease Fitting Installation Procedure | 02/01/2016 | |
| Main Rotor System | en | Blade Tape Repair - 3M 8681HS | ||
| Main Rotor System | en | Bleeding Dampers | ||
| Main Rotor System | en | Clock Angle Corrections and Enstrom Rotor System | ||
| Main Rotor System | en | Ground Bounce (Ground Rock) | ||
| Main Rotor System | en | Identification/Verification and Component Card Correction of 28-14282-11, or -13 Main Rotor Spindles | ||
| Main Rotor System | en | Installing New Pitch Change Bearings | ||
| Main Rotor System | en | Instructions to Install Flapping Reservoirs | ||
| Main Rotor System | en | Main Rotor Blade Track Chart | ||
| Main Rotor System | en | Making Clock Angle Corrections & Enstrom Rotor System | ||
| Main Rotor System | en | Repairing Main Rotor Blade Leading Edge Corrosion | 11/01/2016 | |
| Main Rotor System | en | Stick Shake after Servicing | ||
| Main Rotor System | en | Tracking Blades with Enstrom Rotor System | ||
| Main Rotor System | en | Tracking Main Rotor Blades | 09/26/2013 | |
| Structures | en | Stinger Tube Bracket/Rivet Repair | ||
| Structures | en | Changing Plenum Hand Holds | 10/20/2009 | |
| Structures | en | Paint Removal Process & Repairing for Re-Paint | ||
| Structures | en | Sealing 480 Avionics Bay to Prevent Water Damage to Avionics | 02/01/2016 | |
| Structures | en | Speed Control Mounting Bracket | ||
| Structures | en | Tuning Tail Mounted Vibration Absorber | ||
| Structures | en | Windshield Leak Repair Procedure (S/N 5134) | ||
| Structures | 1 | en | Installation of Rubber "U" Channel P/N: 980-001 on Landing Gear Fairing Closeouts | |
| Tail Rotor System | en | Troubleshooting Tail Rotor Pitch Change Problems | ||
| Tail Rotor System | en | Tracking and Dynamic Balancing - Tail Rotor Assembly | ||
| Tail Rotor System | en | Tail Rotor Spindle Assembly Repair Procedure | 02/02/2016 | |
| Tail Rotor System | en | Tail Rotor Pitch Change Bearings | ||
| Tail Rotor System | en | Tail Rotor Gear Box Seal Replacement | ||
| Tail Rotor System | en | "FM" Tail Rotor Chart | ||
| Tail Rotor System | en | ECD 002 Tail Rotor Grip Bearing Inspection Procedure | ||
| Tail Rotor System | en | Assembling Tail Rotor Spindle Teeter Bearing | ||
| Turbine Options | en | Float Installation & Packing Instructions | 04/24/1997 |