# Lycoming IO-540-K1B5

- Type: Engine model (FAA registry)
- Registry codes: 41665, 42718
- Manufacturer (registry): LYCOMING
- Model: IO-540-K1B5
- Engine type: Reciprocating
- Power: 300 hp
- Data sheet: [TCDS 1E4](https://openairdocs.org/tcds/1E4) (OpenAirDocs)
- Holder: Lycoming Engines
- Installed in: 17 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-io-540-k1b5

Model codes come from the FAA registry's reference file. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all.

## ADs that may apply (OpenAirDocs)

Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2026-17-10](https://openairdocs.org/ad/2026-17-10): Reciprocating Engine Cylinder Section · Lycoming Engines O-235, O-235-A, O-235-AP and 159 more. Effective Sep 14, 2026
- [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026
- [AD 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022
- [AD 2017-16-11](https://openairdocs.org/ad/2017-16-11): Reciprocating Engine Power Section · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-360-B1G6 and 93 more. Effective Aug 15, 2017
- [AD 2015-19-07](https://openairdocs.org/ad/2015-19-07): Fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 187 more. Effective Nov 3, 2015
- [AD 2012-19-01](https://openairdocs.org/ad/2012-19-01): Crankshafts · Lycoming Engines AEIO-360-A1A, AEIO-360-A1B, AEIO-360-A1B6 and 321 more. Effective Oct 24, 2012
- [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012
- [AD 2009-02-03](https://openairdocs.org/ad/2009-02-03): Fuel injection servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 261 more. Effective Feb 9, 2009
- [AD 2005-19-11](https://openairdocs.org/ad/2005-19-11): Crankshafts · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 59 more. Effective Oct 21, 2005
- [AD 2005-12-06](https://openairdocs.org/ad/2005-12-06): Riveted-impulse coupling assemblies and snap-ring coupling assemblies · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 154 more. Effective Jul 19, 2005
- [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004
- [AD 2004-05-24](https://openairdocs.org/ad/2004-05-24): Zinc-plated Crankshaft Gear Retaining Bolts · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 161 more. Effective Mar 30, 2004
- [AD 2003-14-03](https://openairdocs.org/ad/2003-14-03): Rotary fuel pumps · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 262 more. Effective Aug 14, 2003
- [AD 2002-19-03](https://openairdocs.org/ad/2002-19-03): Crankshaft · Lycoming Engines IO-540-A1A5, IO-540-AA1A5, IO-540-AA1B5 and 81 more. Effective Sep 20, 2002
- [AD 99-04-04](https://openairdocs.org/ad/99-04-04): Impulse Coupling Pawl · Lycoming Engines IO-540-K1A5, IO-540-K1B5, IO-540-K1G5 and 6 more. Effective Feb 25, 1999
- [AD 97-15-11](https://openairdocs.org/ad/97-15-11): Cylinder kits · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 538 more. Effective Aug 12, 1997
- [AD 96-23-03](https://openairdocs.org/ad/96-23-03): High pressure fuel pumps · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 174 more. Effective Dec 23, 1996
- [AD 96-09-10](https://openairdocs.org/ad/96-09-10): Oil pump · Lycoming Engines AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A and 334 more. Effective Jul 15, 1996
- [AD 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996
- [AD 95-07-01](https://openairdocs.org/ad/95-07-01): Connecting Rod Bolt · Lycoming Engines AEIO-360-A1E, AEIO-360-B1G6, AEIO-360-H1A and 177 more. Effective Apr 12, 1995
- [AD 92-12-05](https://openairdocs.org/ad/92-12-05): Piston Pins · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 532 more. Effective Jul 10, 1992
- [AD 83-22-04](https://openairdocs.org/ad/83-22-04): Injector Fuel Diaphragm Stem · Lycoming Engines AEIO-540-L1B5D, IO-540-AA1A5, IO-540-G1B5 and 30 more. Effective Nov 4, 1983
- [AD 79-04-05](https://openairdocs.org/ad/79-04-05): Regulator Diaphragm Stem Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 215 more. Effective Sep 26, 1979
- [AD 78-23-10](https://openairdocs.org/ad/78-23-10): Center Body Bellows Seal Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 218 more. Effective Nov 7, 1978
- [AD 75-08-09](https://openairdocs.org/ad/75-08-09): Oil Pump Drive Shaft · Lycoming Engines AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C and 365 more. Effective Aug 18, 1977
- [AD 73-23-01](https://openairdocs.org/ad/73-23-01): Piston Pin Assembly · Lycoming Engines AIO-360-A1A, AIO-360-A1B, AIO-360-A2A and 215 more. Effective Jan 13, 1977
- [AD 75-09-15](https://openairdocs.org/ad/75-09-15): Fuel Starvation To The Engine · Lycoming Engines AIO-320-A1A, AIO-320-A1B, AIO-320-A2A and 130 more. Effective Apr 30, 1975
- [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969
- [AD 66-20-04](https://openairdocs.org/ad/66-20-04): Oil Filter Adapter Gasket · Lycoming Engines IO-320-A1A, IO-320-A2A, IO-320-B1A and 121 more. Effective Aug 27, 1966

Historical (superseded or no longer in force):

- [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 548 more. Effective Dec 5, 2024
- [AD 2011-26-04](https://openairdocs.org/ad/2011-26-04) (historical): Externally mounted fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 186 more. Effective Jan 25, 2012
- [AD 2011-15-10](https://openairdocs.org/ad/2011-15-10) (historical): Fuel servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 256 more. Effective Aug 16, 2011
- [AD 2008-14-07](https://openairdocs.org/ad/2008-14-07) (historical): Externally mounted fuel injector fuel lines · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 185 more. Effective Aug 14, 2008
- [AD 2008-08-14](https://openairdocs.org/ad/2008-08-14) (historical): Fuel injection servo plugs · Superior Air Parts AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 242 more. Effective Apr 29, 2008
- [AD 2008-06-51](https://openairdocs.org/ad/2008-06-51) (historical): Fuel injection servo plugs · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 235 more
- [AD 2006-20-09](https://openairdocs.org/ad/2006-20-09) (historical): Certain crankshafts replacing · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 82 more. Effective Nov 3, 2006
- [AD 2005-26-10](https://openairdocs.org/ad/2005-26-10) (historical): ECi cylinder assemblies. · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 413 more. Effective Jan 31, 2006
- [AD 2002-26-01](https://openairdocs.org/ad/2002-26-01) (historical): Fuel injector fuel lines · Textron Lycoming, AVCO IGO-480-A1B6, IGO-540-B1A, IGO-540-B1C and 178 more. Effective Jan 31, 2003
- [AD 98-18-12](https://openairdocs.org/ad/98-18-12) (historical): Fuel Pump · Textron Lycoming, AVCO AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 249 more. Effective Sep 28, 1998
- [AD 81-18-04 R2](https://openairdocs.org/ad/81-18-04-R2) (historical): Engine Oil Pump Driven Impeller and Shaft · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 376 more. Effective Jun 7, 1982

## Information bulletins (advisory) (7)

- [SAIB NE-19-08](https://openairdocs.org/saib/NE-19-08): Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders. Issued May 2, 2019
- [SAIB NE-08-32R1](https://openairdocs.org/saib/NE-08-32R1): Propeller Governor  Idler Gear Shaft Set Screw. Issued May 13, 2016
- [SAIB NE-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014
- [SAIB NE-13-06](https://openairdocs.org/saib/NE-13-06): Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320, 360, and 540 Series Engines. Issued Nov 21, 2012
- [SAIB NE-09-04](https://openairdocs.org/saib/NE-09-04): Fuel Control/Reciprocating Engines. Issued Jan 10, 2009
- [SAIB NE-06-32R1](https://openairdocs.org/saib/NE-06-32R1): Reciprocating Engine - Crankshaft. Issued Sep 10, 2008
- [SAIB NE-08-32](https://openairdocs.org/saib/NE-08-32) (historical): Propeller Governor Set Screw. Issued Jul 3, 2008

## Registered aircraft (17)

- [N233G](https://openairdocs.org/aircraft/N233G): [Neil Ryan](https://openairdocs.org/faa-owner/NEIL%20RYAN), [Bend, OR](https://openairdocs.org/faa-place/OR/Bend), built 2006, S/N 00060023
- [N31BP](https://openairdocs.org/aircraft/N31BP): [Valiair Lc Trustee](https://openairdocs.org/faa-owner/VALIAIR%20LC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 2006, S/N 00060021
- [N321VG](https://openairdocs.org/aircraft/N321VG): [Gemmiti Vincent M Jr](https://openairdocs.org/faa-owner/GEMMITI%20VINCENT%20M%20JR), [Cabot, AR](https://openairdocs.org/faa-place/AR/Cabot), built 1997, S/N 16
- [N424HD](https://openairdocs.org/aircraft/N424HD): [Island Century Media LLC](https://openairdocs.org/faa-owner/ISLAND%20CENTURY%20MEDIA%20LLC), [N Redington Beach, FL](https://openairdocs.org/faa-place/FL/N%20Redington%20Beach), built 2003, S/N 00030015
- [N463RK](https://openairdocs.org/aircraft/N463RK): [Kaskel Super Service LLC](https://openairdocs.org/faa-owner/KASKEL%20SUPER%20SERVICE%20LLC), [Evansville, IN](https://openairdocs.org/faa-place/IN/Evansville), built 1947, S/N 958
- [N471DB](https://openairdocs.org/aircraft/N471DB): [Bridgham David A](https://openairdocs.org/faa-owner/BRIDGHAM%20DAVID%20A), [Plainfield, NH](https://openairdocs.org/faa-place/NH/Plainfield), built 2015, S/N 013
- [N510BN](https://openairdocs.org/aircraft/N510BN): [Hyannis Air Service Inc DBA](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC%20DBA), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 1991, S/N 2239
- [N520BN](https://openairdocs.org/aircraft/N520BN): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 1991, S/N 2240
- [N530BN](https://openairdocs.org/aircraft/N530BN): [Hyannis Air Service DBA](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20DBA), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 1989, S/N 2209
- [N540BN](https://openairdocs.org/aircraft/N540BN): [Hyannis Air Service Inc D/B/A](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC%20D%2FB%2FA), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 1990, S/N 2207
- [N570BN](https://openairdocs.org/aircraft/N570BN): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 1985, S/N 2175
- [N600DW](https://openairdocs.org/aircraft/N600DW): [Digital Production And Design LLC](https://openairdocs.org/faa-owner/DIGITAL%20PRODUCTION%20AND%20DESIGN%20LLC), [San Mateo, CA](https://openairdocs.org/faa-place/CA/San%20Mateo), S/N 00060022
- [N70AS](https://openairdocs.org/aircraft/N70AS): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 2019, S/N 2314
- [N756EU](https://openairdocs.org/aircraft/N756EU): [Fisher Air LLC](https://openairdocs.org/faa-owner/FISHER%20AIR%20LLC), [Cardington, OH](https://openairdocs.org/faa-place/OH/Cardington), built 1979, S/N R18201055
- [N801SA](https://openairdocs.org/aircraft/N801SA): [Spirit Air Inc](https://openairdocs.org/faa-owner/SPIRIT%20AIR%20INC), [Salmon, ID](https://openairdocs.org/faa-place/ID/Salmon), built 1979, S/N 596
- [N923MW](https://openairdocs.org/aircraft/N923MW): [Trike Industries LLC](https://openairdocs.org/faa-owner/TRIKE%20INDUSTRIES%20LLC), [Draper, UT](https://openairdocs.org/faa-place/UT/Draper), built 2004, S/N 00030017
- [N958KM](https://openairdocs.org/aircraft/N958KM): [East Baton Rouge Parish Mosquito](https://openairdocs.org/faa-owner/EAST%20BATON%20ROUGE%20PARISH%20MOSQUITO), [Baton Rouge, LA](https://openairdocs.org/faa-place/LA/Baton%20Rouge), built 1976, S/N 498

## NTSB investigations (4)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ANC26LA090](https://openairdocs.org/ntsb/ANC26LA090), Aug 24, 2026: Republic RC-3 (N463RK), Evansville, IN, substantial damage, investigation ongoing
- [NTSB WPR13FA022](https://openairdocs.org/ntsb/WPR13FA022), Oct 23, 2012: Behne Glasair III (N655DB), Byron, CA, destroyed, 2 fatal. Probable cause: The pilot's failure to maintain control of the airplane while maneuvering, which resulted in a stall and subsequent spin.
- [NTSB ANC10LA025](https://openairdocs.org/ntsb/ANC10LA025), Mar 15, 2010: Britten-Norman BN-2A-21 (N663SA), Kodiak, AK, substantial damage. Probable cause: The pilot's failure to maintain clearance from rising terrain during takeoff resulting in collision with trees.
- [NTSB MIA07LA066](https://openairdocs.org/ntsb/MIA07LA066), Mar 9, 2007: EADS PZL Warsza PZL-104M Wilga (N424HD), Tampa, FL, substantial damage. Probable cause: The pilot's failure to maintain directional control during the landing roll which resulted in a ground loop and damage to the airplane.

## FAA accident and incident reports (6)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20260824011849A](https://openairdocs.org/incident/20260824011849A), Aug 24, 2026: Republic RC-3 (N463RK), Evansville, IN, Substantial damage. On August 24, 2026. At approximately 1056 eastern time, a Republic RC-3 seabee with an experimental research and development airworthiness certificate was…
- [Incident 20151206022929I](https://openairdocs.org/incident/20151206022929I), Dec 6, 2015: Eads Pzl Warszawa-Okecie Sa PZL-104M WILGA 2000 (N923MW), Rome, NY, Minor damage. N923MW a PZL-104M wilga 2000, experienced a blown right main tire upon landing rwy 15 at the griffiss international airport. The aircraft's right wingtip and…
- [Incident 20140307001309I](https://openairdocs.org/incident/20140307001309I), Mar 7, 2014: Pilatus Britten-Norman Ltd. BN2B-20 (N530BN), Virgin Gorda, Minor damage. During taxi from ramp parking the aircraft struck a fence, incurring minor damage to the right wing tip.
- [Accident 20121023024599A](https://openairdocs.org/incident/20121023024599A), Oct 23, 2012: Behne David S GLASAIR III (N655DB), Brentwood, CA, Destroyed, 2 fatal. An experimental amateur built Glasair III was destroyed by impacted with plowed field. The private pilot owner and his private pilot rated passenger were…
- [Accident 20100315029589A](https://openairdocs.org/incident/20100315029589A), Mar 15, 2010: Britten-Nor BN-2A-21 (N663SA), Kodiak, AK, Substantial damage. Pilot contacted Kodiak ground control and requested taxi from ramp to intersection of runway 25 and runway 29 at the Kodiak airport (padq). Ground control…
- [Accident 20070309005739A](https://openairdocs.org/incident/20070309005739A), Mar 9, 2007: Eadsnv PZL104M2000 (N424HD), Tampa, FL, Substantial damage. (-23) On March 9, 2007, at 1711 EST, a wilga PZL-104M, registered to island century media LLC, experienced a ground loop and collapse of its right main landing…

## Service difficulty reports (100, newest 50)

As reported by operators and repair stations, by the model named in the report.

- [SDR HYIA20260508001](https://openairdocs.org/sdr/HYIA20260508001), May 3, 2026: EXHAUST PIPE. BROKEN. DURING PREFLIGHT THE PILOT NOTED THAT AN EXHAUST PIPE ON THE RIGHT ENGINE WAS CRACKED, WHICH CAUSED DAMAGE TO THE ENGINE COWLING. MAINTENANCE REPLACED THE RIGHT
- [SDR 2023F00282](https://openairdocs.org/sdr/2023F00282), Sep 16, 2023: WIRE. BROKEN. RIGHT HAND MAGNETO OFF LIGHT ILLUMINATED ON RIGHT HAND MVP-50P ENGINE INSTRUMENT DISPLAY. PILOT RETURNED TO AIRPORT, LANDED NORMALLY. MAINTENANCE DISCOVERED BRO
- [SDR HYIA20211105001](https://openairdocs.org/sdr/HYIA20211105001), Nov 3, 2021: NONE. NONE. THE PILOT REPORTED DURING CRUISE THE RIGHT ENGINE RPM AND OIL PRESSURE NOTICEABLE GOING DOWN, WITH THE ENGINE GOING INTO A FEATHER. THE PILOT ELECTED TO SHUT DO
- [SDR HYIA20191206001](https://openairdocs.org/sdr/HYIA20191206001), Dec 5, 2019: BALL JOINT. WORN. AFTER TAKE OFF WHILE REDUCING POWER TO CRUISE SPEED PILOT REPORTED LEFT ENGINE STOPPED REDUCING AT 2800-2900 RPM THE PILOT ELECTED TO RETURN TO THE FIELD. AFTER
- [SDR HYIA20190717003](https://openairdocs.org/sdr/HYIA20190717003), Jul 13, 2019: ENGINE. SHUTDOWN. PILOT REPORTED ENGINE SHUT DOWN AND FEATHERED ON ITS OWN ON TAKE-OFF. MAINTENANCE INSPECTED THE LT AND RT ENGINE FUEL SYSTEM, INTAKE SYSTEM, IGNITION SYSTEM AND
- [SDR 2019F00168](https://openairdocs.org/sdr/2019F00168), Mar 20, 2019: IMPULSE COUPLING. BROKEN. HARD START CONDITION ISOLATED TO BROKEN MAGNETO IMPULSE COUPLING. FLYWEIGHT BIAS SPRING FOUND TO HAVE BROKEN LOOSE FROM PAWL RIVET.
- [SDR 2016FA0000515](https://openairdocs.org/sdr/2016FA0000515), Oct 18, 2016: WASHER. FRAGMENTED. ONE COUNTERWEIGHT WASHER FOUND TO BE FRACTURED INTO THREE PIECES, BUT MAJORITY OF THE WASHER AND MAJORITY OF THE SNAP-RING WAS IN PLACE AND HAD NOT ALLOWED THE 
- [SDR HYIA20160711001](https://openairdocs.org/sdr/HYIA20160711001), Jul 5, 2016: CYLINDER. FAILED. DURING INSPECTION OF RIGHT ENGINE AFTER FAILED ENGINE CHANGE FUNCTIONAL CHECK FLIGHT; MAINTENANCE NOTED LARGE AMOUNTS OF METAL IN OIL SAMPLES. FURTHER INVESTIGA
- [SDR HYIA20160414001](https://openairdocs.org/sdr/HYIA20160414001), Apr 7, 2016: CRANKSHAFT. DAMAGED. PILOT REPORTED PARTIAL LOSS OF POWER IN FLIGHT ON RT ENG, ENGINE RUNNING ROUGH. AFTER BOTH ENGS FULL POWER FOR ABOUT 30 SECONDS, POWER CAME BACK. ENGS WERE BROU
- [SDR CA140624006](https://openairdocs.org/sdr/CA140624006), Jun 20, 2014: SERVO. MALFUNCTIONED. (CAN) SHORTLY AFTER DEPARTURE, AFTER ESTABLISHING THE ACFT IN LEVEL CRUISE, THE PILOT NOTED FLUCTUATIONS IN THE RT ENGINE FUEL PRESSURE GAUGE. THE ENGINE CONTIN
- [SDR HYIA20140415107](https://openairdocs.org/sdr/HYIA20140415107), Apr 12, 2014: PUMP. WEAK. DURING CLIMB THE PILOT REPORTED THE RT FUEL PRESS WOULD NOT REMAIN IN THE GREEN ARC. THE ENG DRIVEN FUEL PUMP WAS REPLACED & OPERATIONAL & LEAK CHECK WERE ACCOM
- [SDR CA130611011](https://openairdocs.org/sdr/CA130611011), Jun 10, 2013: GROUND WIRE. LOOSE. (CAN) AN INSPECTION REVEALED A LOOSE GROUND WIRE ON THE PORT SIDE ACTUATOR FOR THE WING TIP TANK FUEL COCK. GROUND WIRE WAS TIGHTENED AT THE ADJACENT TERMINAL S
- [SDR CA120728001](https://openairdocs.org/sdr/CA120728001), Jul 24, 2012: DISTRIBUTOR BLK. LOOSE. (CAN) MAG WAS REMOVED DUE TO BEING UNSERVICEABLE WITH UNKNOWN HOURS. WHEN INSPECTED THE OIL LIGHT BEARING IN THE DISTRIBUTOR BLOCK WAS LOOSE IN THE PLASTIC MATE
- [SDR CA110419004](https://openairdocs.org/sdr/CA110419004), Apr 15, 2012: ALTERNATOR. FAILED. (CAN) ALTERNATOR REPORTED UNSERVICEABLE. ALTERNATOR FOUND UNABLE TO ROTATE FREELY. UNIT SENT FOR REPAIRS AND TEAR-DOWN REPORT. REPLACED WITH SERVICEABLE UNIT.
- [SDR CA090429004](https://openairdocs.org/sdr/CA090429004), Mar 18, 2009: CONNECTING ROD. FRACTURED. (CAN) CATASTROPHIC ENGINE FAILURE IN CRUISE FLIGHT. PROP FEATHERED. ACFT RETURNED TO BASE ON ONE ENG. ENG CASE FOUND SHATTERED AT ACCY SECTION. CRANKSHAFT FOUND
- [SDR CA090225004](https://openairdocs.org/sdr/CA090225004), Feb 24, 2009: GOVERNOR. MALFUNCTIONED. ON GROUND RUN, RT PROP WOULD NOT FEATHER. OTHER PITCH CHANGE FUNCTIONS WORKED NORMALLY. INITIALLY THE PROP WAS REPLACED WITH SIMILAR RESULTS THE GOVERNOR WAS TH
- [SDR 2007FA0000457](https://openairdocs.org/sdr/2007FA0000457), May 16, 2007: BLADE. CRACKED. ALUMINUM FATIGUE CRACK VISUALLY AND NDT DETECTED. PROPELLER ASSY RECEIVED FOR OVERHAUL AND BLADE NR 2 OF 3 REMOVED FROM PROPELLER ASSY (HC-C3YR-1RF/ F8468A-6R, 
- [SDR M2L2007F00000](https://openairdocs.org/sdr/M2L2007F00000), Apr 28, 2007: DRIVE GEAR. BROKEN. RT ENGINE STARTER DRIVE GEAR SHAFT WAS DAMAGED TO THE EXTENT, THAT THE BENDIX COULD NOT RETRACT FROM THE ENGAGED POSITION. THUS CAUSING THE GEAR TO REMAIN ENGAG
- [SDR M2L2007F00001](https://openairdocs.org/sdr/M2L2007F00001), Apr 28, 2007: DRIVE GEAR. BROKEN. BENDIX DRIVE GEAR OF RT ENGINE BROKE LOCKING RING GEAR OF CRANKSHAFT LOCKING ENGINE TO A STOP CONDITION. (K)
- [SDR CA070410004](https://openairdocs.org/sdr/CA070410004), Apr 6, 2007: BELLCRANK. CRACKED. (CAN) LOWER LT FLAP ACTUATOR BELLCRANK SUPPORT BRACKET CRACKED AT UPPER END. WHEN FLAP IS SUBJECTED TO A SIMULATED AIR LOAD, THE SUPPORT BRACKET FLEXES AND THE 
- [SDR CA050407001](https://openairdocs.org/sdr/CA050407001), Apr 5, 2005: GOVERNOR. SEIZED. (CAN) THE AIRCRAFT DEPARTED FOR DESTINATION WITH ONE PILOT ABOARD. SHORTLY AFTER TAKEOFF, THE RIGHT ENGINE S/N L12245-48 RPM BEGAN TO DETERIORATE. THE PILOT SHU
- [SDR AUS20040480](https://openairdocs.org/sdr/AUS20040480), Jun 2, 2004: CONTROL ROD. CORRODED. (AUS) ELEVATOR CONTROL ROD CORRODED ON INTERNAL THREADS. FOUND DURING INSPECTION IAW SB 303 AND AD/BN2/082.
- [SDR AUS20040292](https://openairdocs.org/sdr/AUS20040292), Feb 17, 2004: CONTROLLER. FAULTY. (AUS) AUTOPILOT BURNED OUT. ROLL SERVO ALSO BURNED OUT.
- [SDR AUS20031265](https://openairdocs.org/sdr/AUS20031265), Dec 5, 2003: ALTIMETER. OUT OF ADJUST. (AUS) ALTIMETER OUT OF CALIBRATION.
- [SDR AUS20031246](https://openairdocs.org/sdr/AUS20031246), Nov 28, 2003: SERVO. FAILED. (AUS) AUTOPILOT ROLL SERVO FAULTY.
- [SDR AUS20031251](https://openairdocs.org/sdr/AUS20031251), Nov 28, 2003: CONNECTOR. CORRODED. (AUS) COMPASS FLUX DETECTOR CONNECTOR CORRODED. SEE MDR 03/1246 FOR ASSOCIATED DEFECT.
- [SDR AUS20031183](https://openairdocs.org/sdr/AUS20031183), Nov 19, 2003: ALTERNATOR. FAILED. (AUS) RT ALTERNATOR FAILED.
- [SDR AUS20031148](https://openairdocs.org/sdr/AUS20031148), Nov 11, 2003: PITOT TUBE. CONTAMINATED. (AUS) PITOT/STATIC SYSTEM CONTAMINATED WITH WATER.
- [SDR AUS20030891](https://openairdocs.org/sdr/AUS20030891), Aug 13, 2003: SPACER. WORN. (AUS) ENGINE OIL FILTER CONTAMINATED WITH BRONZE PARTICLES. INVESTIGATION FOUND THE TACHOMETER DRIVESHAFT SPACER HAD COME LOOSE FROM THE CAMSHAFT AND WAS WEARIN
- [SDR AUS20030836](https://openairdocs.org/sdr/AUS20030836), Aug 12, 2003: PUMP. MISMARKED. (AUS) LT FUEL TRANSFER PUMP UNAPPROVED PART. PUMP HAD A LABEL ATTACHED STATING THE MANUFACTURER DOES NOT RECOMMEND USAGE IN AIRCRAFT APPLICATIONS. PUMP WAS SUPP
- [SDR AUS20030748](https://openairdocs.org/sdr/AUS20030748), Jul 14, 2003: INTAKE VALVE. FAILED. (AUS) NR 6 CYLINDER INTAKE VALVE BROKEN OFF AT UPPER PART OF VALVE STEM. BROKEN INTAKE VALVE CAUSED EXTENSIVE DAMAGE TO CYLINDER.
- [SDR AUS20030635](https://openairdocs.org/sdr/AUS20030635), Jun 18, 2003: BALL JOINT. BROKEN. (AUS) RT ENGINE MIXTURE CONTROL BALL JOINT FAILED.
- [SDR CA030605004](https://openairdocs.org/sdr/CA030605004), Mar 4, 2003: CONNECTING ROD. FRACTURED. (CAN) THE CAUSE OF THE ENGINE FAILURE WOULD BE DUE TO NR 4 CONNECTING ROD BOLTS FRACTURING AT THE CRANKSHAFT JOURNAL. WITH THIS HAPPENING IT BECOMES DISCONNECTE
- [SDR AUS20021455](https://openairdocs.org/sdr/AUS20021455), Dec 23, 2002: FUSE. CORRODED. (AUS) BUSBAR UNDERVOLTAGE FUSE F86 CORRODED AND BROKEN.
- [SDR CA021210009](https://openairdocs.org/sdr/CA021210009), Dec 10, 2002: TRANSMITTER. WORN. (CAN) FIBRE FUEL LEVEL FLOAT WORE ON RIB INSIDE FUEL TANK SENDING SMALL PARTICLES THROUGH ENTIRE FUEL SYSTEM.
- [SDR AUS20021153](https://openairdocs.org/sdr/AUS20021153), Oct 11, 2002: SLEEVE. SPLIT. (AUS) LH AILERON CONTROL ROD SLEEVE SPLIT THROUGH TAPER PIN HOLE.
- [SDR AUS20021181](https://openairdocs.org/sdr/AUS20021181), Oct 11, 2002: BRACKET. WORN. (AUS) ELEVATOR OUTBOARD HINGE BRACKET WORN AND RIVETS LOOSE. FOUNDDURING INSPECTION IAW AD/BN2/70 AND BN2/SB259.
- [SDR AUS20021014](https://openairdocs.org/sdr/AUS20021014), Sep 10, 2002: SCREW. MISSING. (AUS) LH ENGINE COWL SCREW MISSING. SCREW IS LOCATED ON THE FORWARD INBOARD SIDE OF THE LH COWL.
- [SDR AUS20020955](https://openairdocs.org/sdr/AUS20020955), Aug 28, 2002: DISTRIBUTOR. UNSERVICEABLE. (AUS) MAGNETO DISTRIBUTOR BLOCK BEARING LOOSE. MAGNETO CONTAMINATED WITH METAL DUE TO CONTACT BETWEEN DISTRIBUTOR GEAR ANDELECTRODES. SUSPECT FAILURE DUE TO APP
- [SDR AUS20020754](https://openairdocs.org/sdr/AUS20020754), Jul 17, 2002: MAGNETO. FAULTY. (AUS) NO2 ENGINE NO2 MAGNETO FAULTY. MAGNETO MODELS 10-349370-4 AND 10-349310-8.
- [SDR AUS20020676](https://openairdocs.org/sdr/AUS20020676), Jun 16, 2002: DRIVE SHAFT. WRONG PART. (AUS) ENGINE FUEL PUMP DRIVE SHAFT INCORRECT ITEM. INVESTIGATION FOUNDTHAT THE DRIVE SHAFT WAS APPROXIMATELY 6.35MM (0.25IN) SHORTERTHAN NORMAL. THE INCORRECT D
- [SDR CA020610007](https://openairdocs.org/sdr/CA020610007), Jun 8, 2002: HINGE. CRACKED. (CAN) DURING POST FLIGHT WALKAROUND A CRACK WAS NOTICED IN THE ELEVATOR OUTBOARD-HINGE, INBOARD-BRACKET. THIS BRACKET IS THE SUBJECT OF A 100 HOUR REPETITIVE IN
- [SDR AUS20020404](https://openairdocs.org/sdr/AUS20020404), Apr 30, 2002: PUMP. WRONG PART. (AUS) AFTER ENGINE CHANGE AND DURING GROUND RUNS THE ENGINE FAILED WHEN THE BOOST PUMP WAS TURNED OFF. SUBSEQUENT INVESTIGATION FOUND THAT THE INCORRECT FUEL PU
- [SDR AUS20020266](https://openairdocs.org/sdr/AUS20020266), Mar 15, 2002: PIPE. LOOSE. (AUS) RH ENGINE CRANKCASE TO OIL COOLER PIPE LOOSE AND LEAKING. ENGINEHAD BEEN RECENTLY REPLACED. PERSONNEL/MAINTENANCE ERROR.
- [SDR AUS20020191](https://openairdocs.org/sdr/AUS20020191), Mar 11, 2002: TAPPET. CRACKED. (AUS) RH ENGINE NO6 CYLINDER INLET TAPPET AND NO4 CYLINDER EXHAUSTTAPPET BODIES CRACKED.
- [SDR AUS20020173](https://openairdocs.org/sdr/AUS20020173), Feb 18, 2002: THROTTLE. BROKEN. (AUS) LT ENGINE THROTTLE SLIDING END ASSEMBLY BROKEN.
- [SDR AUS20011463](https://openairdocs.org/sdr/AUS20011463), Dec 28, 2001: CONTROLLER. FAULTY. (AUS) AUTOPILOT CONTROL PROGRAMMER FAULTY.
- [SDR AUS20011369](https://openairdocs.org/sdr/AUS20011369), Dec 18, 2001: ROCKER. MISINSTALLED. (AUS) ENGINE ROCKER COVER GASKETS INCORRECTLY FITTED. FOLLOWING REMOVAL OF THE ROCKER COVERS IT WAS FOUND THAT THE ROCKERS WERE ALSO INCORRECTLY FITTED. SOME IN
- [SDR AUS20011394](https://openairdocs.org/sdr/AUS20011394), Dec 17, 2001: CAM. WORN. (AUS) MAGNETO IMPULSE CAM WORN BEYOND LIMITS.
- [SDR AUS20011357](https://openairdocs.org/sdr/AUS20011357), Dec 14, 2001: CAM. FAILED. (AUS) MAGNETO CAM PIVOT PIN HAD EXCESSIVE PLAY. PIN HAD APPROXIMATELY 0.508MM (0.020IN) OF PLAY. MAXIMUM PLAY 0.3556MM (0.014IN).

All 100: https://openairdocs.org/engine/lycoming-io-540-k1b5/reports.md

## STCs that may be installed (OpenAirDocs) (44)

Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. B & C Specialty Products Inc
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd
- [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal. Ly-Con Rebuilding Company
- [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc
- [STC SE00939WI](https://openairdocs.org/stc/SE00939WI): Installation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines. B & C Specialty Products Inc
- [STC SE2387CE](https://openairdocs.org/stc/SE2387CE): Installation of B & C Speciality Products lightweight (10.2 pounds) engine starter P/N BC 315-100-1(12 volt) or P/N BC 315-100-3(24 volt). B & C Specialty Products Inc. Lists IO-540 Series
- [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc
- [STC SE6WE](https://openairdocs.org/stc/SE6WE): Installation of two Roto-Master Turbochargers Model No. 3DT5FF10J2, P/N 600572-00 (formerly Rajay Model 315F10, P/N RJ0080-100, or 102). TALCO Aviation
- [STC SE01436LA](https://openairdocs.org/stc/SE01436LA): Installation of Firewall Forward Technologies LLC modified camshaft. Centri-lube Technologies LLC
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc
- [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters. Cygnet Aerospace Corp
- [STC SE09445SC](https://openairdocs.org/stc/SE09445SC): Installation of fuel injector nozzles. General Aviation Modifications Inc. Lists IO-540 Series
- [STC SE1339SW](https://openairdocs.org/stc/SE1339SW): Modify pistons to Drawings 11007 and 11015; piston rings. Continental Motors, Inc
- [STC SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts. Continental Motors, Inc. Lists IO-540 Series
- [STC SE7509SW](https://openairdocs.org/stc/SE7509SW): Installation of any or all parts listed on Airmotive Engineering Drawing List No. 852-1, Rev. 1, dated 10/4/88, or later FAA approved revision. Continental Motors, Inc. Lists IO-540 Series
- [STC SE7667SW](https://openairdocs.org/stc/SE7667SW): Installation of parts listed on Drawing List No. 8810-3, Rev 6. Continental Motors, Inc. Lists IO-540 Series
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists IO-540 Series
- [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed. Hartzell Engine Technologies, LLC. Lists IO-540 Series
- [STC SE00226NY](https://openairdocs.org/stc/SE00226NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter. Hartzell Engine Technologies, LLC
- [STC SE00357NY](https://openairdocs.org/stc/SE00357NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter installed. Hartzell Engine Technologies, LLC. Lists IO-540 Series
- [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [STC SE2902NM](https://openairdocs.org/stc/SE2902NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [STC SE7582SW](https://openairdocs.org/stc/SE7582SW): Grinding of high compression NITRIDED Cylinders to .010 oversize, as an alternative to chrome plating or rebarreling, and the installation of SL10207 P10 Piston, SL74241 P10 Top and second compression ring, and SL 73857 P10 oil control ring. Superior Air Parts, Inc
- [STC SE02555AT](https://openairdocs.org/stc/SE02555AT): Consolidated Fuel Systems 201F series fuel pump assembly on various Textron Lycoming engine models. Kelly Aerospace Energy Systems LLC
- [STC SE00768CH](https://openairdocs.org/stc/SE00768CH): Replace Slick 6000, 6100, 6200 and 6300 series magnetos and TCM/Bendix S6-20, S6-200 and S6-1200 series magnetos with the Champion Limited Authority Spark Advance Regulator (LASARTM) ignition system. Champion Aerospace LLC. Lists IO-540 Series
- [STC SE01524CH](https://openairdocs.org/stc/SE01524CH): Replace Slick 6000, 6100, 6200, 6300, 4000, 4100, 4200, and 4300 series magnetos and TCM/Bendix S6-20, S6-200, S6-1200, S-20, S-200, and S-1200 series magnetos with Champion Limited Authority Spark Advance Regulator (LASAR ) Model 4755 and 6755 bush kit ignition systems. Champion Aerospace LLC
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc
- [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc
- [STC SE22WE](https://openairdocs.org/stc/SE22WE): Installation of AiResearch Turbosupercharger 406610-3. Approved for IO-540-J4A5 model. GE Engine Services-Corporate Aviation Inc. DBA Garrett Aviation Services. Lists IO-540 Series
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC SE00890LA](https://openairdocs.org/stc/SE00890LA): Installation of Nickson's cylinder barrels on Lycoming reciprocating engine models. Nickson's Machine Shop Inc. Lists IO-540 Series
- [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013. Exxon Company USA. Lists IO-540 Series
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co. Lists IO-540 Series
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists IO-540 Series
- [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. Phillips Petroleum Co. Lists IO-540 Series
- [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company. Lists IO-540 Series
- [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc. Lists IO-540 Series
- [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less. Bel-Ray Company, Inc. Lists IO-540 Series
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists IO-540 Series
- [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL. Lists IO-540 Series
- [STC SE44WE](https://openairdocs.org/stc/SE44WE): Use of Kling Aviation Oil, Specifications KL-100, KL-200 and KL-300 in Continental and Lycoming engines. Kling Oil Company. Lists IO-540 Series
- [STC SA01436DE](https://openairdocs.org/stc/SA01436DE) (historical): Installation of Firewall Forward Technologies, LLC modified camshaft. Centri-Lube Technologies LLC

## PMA parts (OpenAirDocs) (over 1,000, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first.

- [ES66M19385](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186804045820251216184409.0001): Clamp, Magneto. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 66M19385 · Nov 10, 2025
- [ES10-400567](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182838314420251216184405.0001): Bearing, Ball. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-400567 · Nov 10, 2025
- [ES10-349249](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID172741321620251216184404.0001): Washer, Bowed. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349249 · Nov 10, 2025
- [ES10-180046-28](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170373951520251216184357.0001): Sleeve, Clear. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-180046-28 · Nov 10, 2025
- [ES-349310-8](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID164135450720251216184352.0001): Magneto Assembly, S-1200 Series, 6 Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces LW-349310-8, LW-349310-8D… · Nov 10, 2025
- [ES10-349247](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID155835169920251216184407.0001): Retainer, Bearing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349247 · Nov 10, 2025
- [ES10-78655](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID148578074420251216184359.0001): Washer, Flat. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-78655 · Nov 10, 2025
- [ES10-35937-24](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131353354520251216184356.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-35937-24 · Nov 10, 2025
- [ES-349290-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID124195582920251216184349.0001): Magneto Assembly, S-1200 Series, 6 Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces LW-349290-1, LW-349290-1D, 75454… · Nov 10, 2025
- [ES-349310-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117952123520251216184351.0001): Magneto Assembly, S-1200 Series, 6 Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces LW-349310-1, LW-349310-1D, 75453… · Nov 10, 2025
- [ES-349370-4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117076779520251216184355.0001): Magneto Assembly, S-1200 Series, 6 Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces LW-349370-4, LW-349370-4D, 75453… · Nov 10, 2025
- [ES10-5752](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID115793636520251216184401.0001): Cable, Clip. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-5752 · Nov 10, 2025
- [ES10-349328](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID114147850320251216184403.0001): Flat Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349328 · Nov 10, 2025
- [ES10-349221](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID111222593020251216184358.0001): Stud, Hex 10-32. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349221 · Nov 10, 2025
- [ES10-349242](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID110743662720251216184408.0001): Gear, Spur, 1200 Series, 6-Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349242 · Nov 10, 2025
- [ES10-349243-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID108636864620251216184402.0001): Cam, 1200. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349243-2 · Nov 10, 2025
- [AB-160844](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100141747720251216184413.0001): Spring & Brush Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-160844 · Nov 10, 2025
- [OC](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178549155320250923184433.0001): Oil Cooler Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Sep 12, 2025
- [CFRS16803-137](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID135831136720251002184910.0001): Liner. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces RS16803-137 · Sep 2, 2025
- [AE45BS](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID187750711420250908153020.0001): Brush Rack Assembly. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU1045BS · Aug 27, 2025
- [AE943](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID185624017520250908153027.0001): Rotor Shaft. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU-228 · Aug 27, 2025
- [AE1003](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179565848920250908153019.0001): Drive End Housing. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number A2E1003K · Aug 27, 2025
- [AE45BS-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID173583138520250908153031.0001): Brush Rack Assembly. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU-1045BS · Aug 27, 2025
- [AE944](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157009852420250908153027.0001): Rotor Shaft. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALE-273 · Aug 27, 2025
- [AE45BS-E](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID143460060920250908153031.0001): Brush Rack Assembly. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALE-1045BS · Aug 27, 2025
- [AE2241](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127316494620250908153022.0001): Fan Assembly. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number 90-2241 · Aug 27, 2025
- [AE1132](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103582853720250908153023.0001): Slip Ring End Housing. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Numbers ALK-1132AS… · Aug 27, 2025
- [SL6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151538433320250923185921.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025
- [TXPL6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146504457020250923185923.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025
- [HSS](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104096221220250923185925.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025
- [RA7791ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID148564474720250127211204.0001): Rotor, Pump. Aircraft Component Design LLC · PMA PQ2138NE · Replaces RA7791 · Jan 6, 2025
- [FFT-PLG-003](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195538759920240801144311.0001): Cam End Plug. Centri-Lube Technologies LLC · PMA PQ2043NM · Modification part · Jul 16, 2024
- [FFT-PLG-004](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID162830829420240801144312.0001): Cam End Plug. Centri-Lube Technologies LLC · PMA PQ2043NM · Modification part · Jul 16, 2024
- [AA48111-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120682187320240813134136.0001): Oil Filter. Aero Accessories LLC · PMA PQ1206CE · Replaces Aero AccessoriesAA48111Champion… · Jul 12, 2024
- [CF73966](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178353257420240715164040.0001): Spacer. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces 73966 · Jun 24, 2024
- [CF07A23031](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136616521920240715164043.0001): Bracket, Fuel Manifold. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces 07A23031 · Jun 24, 2024
- [CFSTD-251](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129676558220240715164045.0001): Washer, #10 Lock, Internal Teeth. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces STD-251 · Jun 24, 2024
- [CFSTD-82](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123933662120240715164045.0001): Screw,   #10-24 X 1/2, RD HD. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces STD-82 · Jun 24, 2024
- [201F-5003](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182515755020240701174400.0001): Fuel Pump. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lear RomecRG17980D/MLycoming… · Jun 20, 2024
- [ES3018](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194884707820251216184204.0001): Clamp, Bearing Cap. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3018 · May 20, 2024
- [AM-3021](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194256093820251216184144.0001): Screw Distributor Block. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3021 · May 20, 2024
- [ES5617](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID190223284620251216184226.0001): Machining, Rotating Magnet. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M5617 · May 20, 2024
- [ES3221](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID189601053820251216184228.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3221 · May 20, 2024
- [AK-3975](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181109606820251216184201.0001): Coil, Ignition. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3009, M3114, M3525, K3975, K3975 · May 20, 2024
- [AM-3015](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180990573320251216184149.0001): Screw, Housing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3015 · May 20, 2024
- [AM-3006](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178460806720251216184151.0001): Bearing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3006 · May 20, 2024
- [AM2536](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175576430320251216184152.0001): Woodruff Key. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M2536 · May 20, 2024
- [ES3040](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175045989620251216184205.0001): Coil Wedge. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3040 · May 20, 2024
- [ES917](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170587168620251216184202.0001): Impulse Coupling Spring. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M917 · May 20, 2024
- [AK-3984](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID168254730520251216184200.0001): Capacitor. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3183, K3984 · May 20, 2024

All of them: https://openairdocs.org/engine/lycoming-io-540-k1b5/pma.md

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