# Lycoming TIO-540-S1AD

- Type: Engine model (FAA registry)
- Registry code: 41988
- Manufacturer (registry): LYCOMING
- Model: TIO-540-S1AD
- Engine type: Reciprocating
- Power: 300 hp
- Data sheet: [TCDS E14EA](https://openairdocs.org/tcds/E14EA) (OpenAirDocs)
- Holder: Lycoming Engines
- Installed in: 13 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-tio-540-s1ad

Model codes come from the FAA registry's reference file.

## 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 2026-04-11](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 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 2010-07-08](https://openairdocs.org/ad/2010-07-08): Turbochargers · Kelly Aerospace Energy Systems HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 137 more. Effective Apr 19, 2010
- [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 2005-12-06](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 2002-12-07](https://openairdocs.org/ad/2002-12-07): Oil Filter Converter Plate Gasket or the Converter Plate Kit · Lycoming Engines HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 95 more. Effective Jul 3, 2002
- [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 97-01-04](https://openairdocs.org/ad/97-01-04): Cylinder assemblies · Lycoming Engines IO-540-M1B5D, LTIO-540-F2BD, LTIO-540-J2B and 10 more. Effective Apr 22, 1997
- [AD 91-21-01 R1](https://openairdocs.org/ad/91-21-01-R1): Exhaust System Flanges · Lycoming Engines TIO-540-S1AD. Effective Jun 27, 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 91-08-07](https://openairdocs.org/ad/91-08-07): Fuel Pump · Lycoming Engines TIO-360-A1A, TIO-360-A1B, TIO-360-A3B6 and 51 more. Effective May 6, 1991
- [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 80-17-10](https://openairdocs.org/ad/80-17-10): Transition Wastegate Assembly · Lycoming Engines TIO-540-S1AD. Effective Aug 18, 1980
- [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

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 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 2002-23-06](https://openairdocs.org/ad/2002-23-06) (historical): Crankshaft gear retaining bolts · Textron Lycoming, AVCO AEIO-540, AEIO-540-D4A5, AEIO-540-D4B5 and 46 more. Effective Nov 19, 2002
- [AD 2002-20-51](https://openairdocs.org/ad/2002-20-51) (historical): Crankshaft gear retaining bolts · Textron Lycoming, AVCO AEIO-540, IO-540 Series (all), LTIO-540-F2BD and 39 more
- [AD 2002-17-53](https://openairdocs.org/ad/2002-17-53) (historical): Crankshaft · Lycoming Engines LTIO-540-F2BD, LTIO-540-J2B, LTIO-540-J2BD and 36 more
- [AD 2002-04-51](https://openairdocs.org/ad/2002-04-51) (historical): Crankshaft · Lycoming Engines LTIO-540-F2BD, LTIO-540-J2B, LTIO-540-J2BD and 8 more
- [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 93-05-22](https://openairdocs.org/ad/93-05-22) (historical): Fuel Injector Fuel Lines · Lycoming Engines TIO-540-S1AD. Effective May 11, 1993
- [AD 92-12-10](https://openairdocs.org/ad/92-12-10) (historical): Lycoming Engines TIO-540-S1AD. Effective Jun 5, 1992

## Information bulletins (advisory) (8)

- [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-08-26R3](https://openairdocs.org/saib/NE-08-26R3): Magneto/Distributor. Issued Mar 31, 2011
- [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-08-26R1](https://openairdocs.org/saib/NE-08-26R1) (historical): Dual Magnetos. Issued Jul 8, 2008
- [SAIB NE-08-32](https://openairdocs.org/saib/NE-08-32) (historical): Propeller Governor Set Screw. Issued Jul 3, 2008

## Registered aircraft (13)

- [N2176V](https://openairdocs.org/aircraft/N2176V): [Aspen Avionics Inc](https://openairdocs.org/faa-owner/ASPEN%20AVIONICS%20INC), [Phoenix, AZ](https://openairdocs.org/faa-place/AZ/Phoenix), built 1979, S/N 32R-7987116
- [N30176](https://openairdocs.org/aircraft/N30176): [Arce George S](https://openairdocs.org/faa-owner/ARCE%20GEORGE%20S), [Roswell, GA](https://openairdocs.org/faa-place/GA/Roswell), built 1978, S/N 32R-7887271
- [N3078M](https://openairdocs.org/aircraft/N3078M): [Cartwright Michael R II](https://openairdocs.org/faa-owner/CARTWRIGHT%20MICHAEL%20R%20II), [El Cajon, CA](https://openairdocs.org/faa-place/CA/El%20Cajon), built 1978, S/N 32R-7887002
- [N4390W](https://openairdocs.org/aircraft/N4390W): [Wurster Gregory J](https://openairdocs.org/faa-owner/WURSTER%20GREGORY%20J), [Creston, IA](https://openairdocs.org/faa-place/IA/Creston), built 1986, S/N 32R-8629005
- [N47WP](https://openairdocs.org/aircraft/N47WP): [Rogerson Gary J](https://openairdocs.org/faa-owner/ROGERSON%20GARY%20J), [Lake Wales, FL](https://openairdocs.org/faa-place/FL/Lake%20Wales), built 1983, S/N 32-8324014
- [N48BL](https://openairdocs.org/aircraft/N48BL): [Nw Aircraft Sales & Leasing LLC](https://openairdocs.org/faa-owner/NW%20AIRCRAFT%20SALES%20%26%20LEASING%20LLC), [Scappoose, OR](https://openairdocs.org/faa-place/OR/Scappoose), built 1992, S/N 0019
- [N574MG](https://openairdocs.org/aircraft/N574MG): [Minor J Mark](https://openairdocs.org/faa-owner/MINOR%20J%20MARK), [Rockledge, FL](https://openairdocs.org/faa-place/FL/Rockledge), built 1979, S/N 32R-7987101
- [N661W](https://openairdocs.org/aircraft/N661W): [Jff Air LLC](https://openairdocs.org/faa-owner/JFF%20AIR%20LLC), [Dalton, GA](https://openairdocs.org/faa-place/GA/Dalton), built 1984, S/N 32R-8429008
- [N726GJ](https://openairdocs.org/aircraft/N726GJ): [Beran James](https://openairdocs.org/faa-owner/BERAN%20JAMES), [Mahwah, NJ](https://openairdocs.org/faa-place/NJ/Mahwah), built 1980, S/N 328024047
- [N728SJ](https://openairdocs.org/aircraft/N728SJ): [Highland Aviation LLC](https://openairdocs.org/faa-owner/HIGHLAND%20AVIATION%20LLC), [Flagstaff, AZ](https://openairdocs.org/faa-place/AZ/Flagstaff), built 1981, S/N 32R8129011
- [N8170Y](https://openairdocs.org/aircraft/N8170Y): [Raven Aeronautics Ltd](https://openairdocs.org/faa-owner/RAVEN%20AERONAUTICS%20LTD), [Monument, CO](https://openairdocs.org/faa-place/CO/Monument), built 1980, S/N 32R-8029069
- [N8210E](https://openairdocs.org/aircraft/N8210E): [Powell Samuel C](https://openairdocs.org/faa-owner/POWELL%20SAMUEL%20C), [Burlington, NC](https://openairdocs.org/faa-place/NC/Burlington), built 1982, S/N 32R-8229053
- [N8960Y](https://openairdocs.org/aircraft/N8960Y): [Smith Jeremiah R](https://openairdocs.org/faa-owner/SMITH%20JEREMIAH%20R), [Fort Wayne, IN](https://openairdocs.org/faa-place/IN/Fort%20Wayne), built 1978, S/N 32R7887047

## NTSB investigations (1)

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 CEN23LA193](https://openairdocs.org/ntsb/CEN23LA193), May 19, 2023: Piper PA32RT (N442TM), DeKalb, IL, substantial damage. Probable cause: The pilot’s failure to maintain aircraft control during a go-around in gusting winds. Contributing was the presence of windshear.

## FAA accident and incident reports (3)

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 20230519007089A](https://openairdocs.org/incident/20230519007089A), May 19, 2023: Piper PA-32RT-300T (N442TM), Dekalb, IL, Substantial damage. The pilot in command was providing instruction in [privacy data omitted]. The pilot flying had bought this aircraft that morning and was being introduced to…
- [Incident 20090622008039I](https://openairdocs.org/incident/20090622008039I), Jun 22, 2009: Amtr SEQUOIA300 (N48BL), Redlands, CA, Minor damage. (-23) Pilot stated that he had forgotten to lower the landing gear. He also stated the he had just flown his fixed gear aircraft.
- [Incident 19940811036139I](https://openairdocs.org/incident/19940811036139I), Aug 11, 1994: Amtr SEQUOIA300 (N48BL), Gillette, WY, Minor damage. Encountered heavy rain enroute. Landed on gravel dirt road. Wing scraped ground.

## Service difficulty reports (52, newest 50)

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

- [SDR 2022FA0000469](https://openairdocs.org/sdr/2022FA0000469), Jul 28, 2022: MAGNETO. CORRODED. WHILE ENROUTE ENGINE FAILURE OCCURRED CAUSING A FORCED LANDING INTO A WOODED AREA. INVESTIGATION FOUND THAT CAM FOLLOWER ON RIGHT SIDE OF SINGLE SHAFT MAGNETO W
- [SDR 2014FA0000492](https://openairdocs.org/sdr/2014FA0000492), Jul 2, 2014: CLAMP. FAILED. FAILURE OF THE CLAMP AND OR EXHAUST GASKET WHICH CAUSED EXCESSIVE HEAT DAMAGE TO THE UPPER COWLING AND ASSOCIATED WIRING LOCATED IN THE VICINITY OF THE EXHAUST 
- [SDR 2014FA0000387](https://openairdocs.org/sdr/2014FA0000387), Jun 20, 2014: COWLING. DAMAGED. FAILURE OF THE CLAMP AND OR EXHAUST GASKET WHICH CAUSED EXCESSIVE HEAT DAMAGE TO UPPER COWLING AND ASSOCIATED WIRING LOCATED IN THE VICINITY OF THE EXHAUST LEAK
- [SDR 2013FA0000737](https://openairdocs.org/sdr/2013FA0000737), Nov 15, 2013: BREAKER POINTS. LOOSE. THE RIVET THAT HOLDS THE OPENING CONTACT POINT TO THE MOVEABLE ARM HAS LOOSENED ALLOWING THE ARM TO MOVE BUT THE POINTS DO NOT BREAK CONTACT. THE MAGNETO THEN D
- [SDR 2013FA0000738](https://openairdocs.org/sdr/2013FA0000738), Oct 10, 2013: BREAKER POINTS. LOOSE. THE RIVET THAT HOLDS THE OPENING CONTACT POINT TO THE MOVABLE ARM HAS SOOSENED ALLOWING THE ARM TO MOVE BUT POINTS DO NOT BREAK CONTACT. THE MAG THEN DOES NOT D
- [SDR 2PMR2014022800108](https://openairdocs.org/sdr/2PMR2014022800108), Jul 11, 2013: SHAFT. WORN. AIRCRAFT LANDED WITH NO OIL PRESSURE AND FUSELAGE INCLUDING WINDSCREEN TOTALLY COVERED IN OIL. PILOT REPORTED THAT 10,000 FT MSL, THE ENGINE STARTED LEAKING OIL
- [SDR 2012FA0000437](https://openairdocs.org/sdr/2012FA0000437), Jun 26, 2012: TRUNNION. CRACKED. DURING AN ANNUAL INSPECTION, WHILE VISUALLY INSPECTING NOSE GEAR, MECHANIC NOTICED THE CRACK IN THE NOSE GEAR TRUNNION ASSY. THERE WERE NO SIGNS OF HYD FLUID LE
- [SDR 2010FA0000032](https://openairdocs.org/sdr/2010FA0000032), Nov 26, 2009: MAGNETO. MISOVERHAULED. MAGNETO WAS O/H ALONG WITH ENTIRE ENG 150 HRS AGO, 5 YRS CALENDAR TIME. ON A SUCCESSFUL RUN UP, DEPARTING, ENG BEGAN RUNNING VERY ROUGH ABOUT 100 FT ABOVE RUNWA
- [SDR 2009FA0000613](https://openairdocs.org/sdr/2009FA0000613), Jul 7, 2009: MOUNT. BROKEN. UPON REMOVAL OF THE ENGINE FOR OVERHAUL, DISCOVERED THAT THE NOSE GEAR DRAG LINK ATTACH POINT WAS BROKEN. DISCOVERED THAT THE LWR RT ENGINE MOUNT MOUNTING BOLT 
- [SDR 2007FA0000163](https://openairdocs.org/sdr/2007FA0000163), Feb 1, 2007: FITTING. CRACKED. THIS PART IS BOLTED TO THE TURBOCHARGER ASSY BETWEEN THE HOT AND COLD SECTIONS. THE HIGH PRESSURE OIL LINE CONNECTS TO THIS PART VIA A FITTING IN THE TOP OF THE
- [SDR 2006FA0000407](https://openairdocs.org/sdr/2006FA0000407), Apr 14, 2006: HOSE. DETERIORATED. PARTIAL POWER LOSS, TWO CYLINDERS DROPPED OUT, CAUSED BY SMALL PARTICLES OF RUBBER HOSE FROM UPPER DECK AIR REFERENCE LINES FLAKING OFF AND OCCLUDING THE FUEL I
- [SDR CA040811007](https://openairdocs.org/sdr/CA040811007), Jul 2, 2004: CABLE. WORN. (CAN) STAB TRIM STIFF WHEN COLD, PILOT SUSPECTED AFT TRIM DRUM INSPECTION OF COMPLETE CONTROL SYSTEM. FOUND CABLE (NR 62701-135) FRAYED OVER 60 PERCENT AT AREA 
- [SDR CA040609013](https://openairdocs.org/sdr/CA040609013), May 27, 2004: THROTTLE CABLE. BROKEN. (CAN) AFTER A PREFLIGHT CHECK, THE PILOT COMPLAINED OF AN EXTREMELY LOOSE THROTTLE CONTROL. AFTER FURTHER INSPECTION, THE CONTROL CABLE WAS DETERMINED TO BE INT
- [SDR AUS20031258](https://openairdocs.org/sdr/AUS20031258), Nov 30, 2003: STUD. CORRODED. (AUS) LT ELEVATOR FORWARD CONTROL CABLE FAILED. CABLE LOCKING STUD CORRODED. CONTROL WHEEL HAD BEEN RESTRAINED WITH SEAT BELT AND CABLE LOCK STUD FAILED DUE TO 
- [SDR AUS20030721](https://openairdocs.org/sdr/AUS20030721), Jul 19, 2003: CONNECTING ROD. CRACKED. (AUS) CONNECTING ROD CONTAINED A CRACK INDICATION ADJACENT TO THE LITTLE END. LENGTH OF CRACK APPROXIMATELY 6.35MM (0.25IN). CAP ON ANOTHER CONNECTING ROD CONTA
- [SDR 2003FA0000570](https://openairdocs.org/sdr/2003FA0000570), May 10, 2003: DISTRIBUTOR GEAR. BROKEN. DISTRIBUTOR GEAR ON RIGHT MAGNETO, FAILED.
- [SDR 2003FA0000462](https://openairdocs.org/sdr/2003FA0000462), Mar 12, 2003: GASKET. UNSERVICEABLE. GASKET FAILED NEAR MOUNTING STUD, ALLOWING OIL UNDER PRESSURE TO EXCAPE OVERBOARD, RESULTING IN LOSS OF OIL PRESSURE AND SUBSEQUENT EMERGENCY OFF AIRPORT LANDIN
- [SDR 2003FA0000515](https://openairdocs.org/sdr/2003FA0000515), Mar 12, 2003: GASKET. FAILED. GASKET FAILED NEAR MOUNTING STUD, ALLOWING OIL UNDER PRESSURE TO ESCAPE OVERBOARD, RESULTING IN LOSS OF OIL PRESSURE AND SUBSEQUENT EMERGENCY OFF AIRPORT LANDIN
- [SDR 2003FA0000409](https://openairdocs.org/sdr/2003FA0000409), Mar 4, 2003: BEARING. WORN. FOUND BEARING MATERIAL IN OIL SUCTION SCREEN. REMOVED CYLINDERS AND FOUND CYLINDER NR 2 CONNECTING ROD BEARING FAILING BY LAMINATIONS PICKING LOOSE ON INSIDE DI
- [SDR 2003FA0000410](https://openairdocs.org/sdr/2003FA0000410), Mar 4, 2003: EXHAUST VALVE. WORN. INVESTIGATED HEAVY OIL CONSUMPTION. UPON DISASSEMBLY, FOUND VALVES EXCESSIVELY WORN.
- [SDR 2003FA0000411](https://openairdocs.org/sdr/2003FA0000411), Mar 4, 2003: VALVE GUIDE. WORN. INVESTIGATED HEAVY OIL CONSUMPTION. UPON DISASSEMBLY, FOUND VALVE GUIDES EXCESSIVE WORN.
- [SDR AUS20021018](https://openairdocs.org/sdr/AUS20021018), Sep 6, 2002: CRANKSHAFT. CRACKED. (AUS) CRANKSHAFT CRACKED IN FORWARD RADIUS OF NO4 MAIN BEARING JOURNAL. FOUND DURING MAGNETIC PARTICLE INSPECTION. ENGINE HAD A BULKSTRIP CARRIED OUT AT 86.2 HO
- [SDR AUS20020457](https://openairdocs.org/sdr/AUS20020457), May 13, 2002: SHAFT. CRACKED. (AUS) NOSE LANDING GEAR STRUT TORQUE TUBE SHAFT CRACKED FROM BOLT HOLE. FOUND DURING MAGNAFLUX INSPECTION.
- [SDR AUS20020326](https://openairdocs.org/sdr/AUS20020326), Apr 5, 2002: SWITCH. INTERMITTENT. (AUS) NOSE LANDING GEAR STEERING SWITCH INTERMITTENT IN OPERATION.BRAKE CALIPERS LEAKING.
- [SDR 2002FA0000860](https://openairdocs.org/sdr/2002FA0000860), Sep 25, 2001: MAGNETO. CRACKED. AIRCRAFT ON CLIMBOUT FROM AIRPORT, LOST ENGINE POWER AND CRASHED. INVESTIGATION CONCLUDED MAGNETO FAILED DUE TO FATIGUE CRACK IN HOUSING CAUSING MAGNETO HOUSING
- [SDR 20010511CW005](https://openairdocs.org/sdr/20010511CW005), May 1, 2001: CRANKCASE. CRACKED. DURING ANNUAL INSPECTION, NOTICED OIL ON LEFT FORWARD SECTION OF ENGINE. REMOVED PROP GOVERNOR AND ENGINE BAFFLING. FOUND SMALL CRACK IN CRANKCASE, FORWARD OF N
- [SDR AU001264](https://openairdocs.org/sdr/AU001264), Dec 1, 2000: VALVE GUIDE. FAILED. (AUS) NR 5 CYLINDER EXHAUST VALVE GUIDE BROKEN UP. PIECES OF THE VALVE GUIDE EXITED THE CYLINDER AND JAMMED AND DAMAGED THE TURBOCHARGER TURBINE. NR 5 CYLINDER 
- [SDR CA001123010](https://openairdocs.org/sdr/CA001123010), Nov 20, 2000: FITTING. CORRODED. (CAN) WHEN ENDEAVOURING TO REPLACED THE WINDSCREENS, THESE BRACKETS WERE FOUND HEAVILY CORRODED AND HAD TO BE REPLACED.
- [SDR 20001026SH010](https://openairdocs.org/sdr/20001026SH010), Oct 26, 2000: MAGNETO. CONTAMINATED. OWNER REPORTED ENGINE GETTING HARDER TO START, LAST START TOOK 20 MINUTES, WOULD NOT START AT NEXT FUEL STOP. REMOVED SPARK PLUG LEADS TO CHECK FOR SPARK, NONE 
- [SDR 20001026SH011](https://openairdocs.org/sdr/20001026SH011), Oct 26, 2000: MAGNETO. CONTAMINATED. OWNER REPORTED ENGINE GETTING HARDER TO START, LAST START TOOK 20 MINUTES, WOULD NOT START AT NEXT FUEL STOP. REMOVED SPARK PLUG LEADS TO CHECK FOR SPARK, NONE 
- [SDR 20001109SH034](https://openairdocs.org/sdr/20001109SH034), Oct 2, 2000: WASTEGATE VALVE. MISSING. PILOT REPORTED UNABLE TO DEVELOP NORMAL POWER AT ALTITUDE. INSPECTION REVEALED 30 PERCENT - 40 PERCENT OF WASTEGATE BUTTERFLY VALVE MISSING. UNIT REMOVED, REPAI
- [SDR AU991089](https://openairdocs.org/sdr/AU991089), Oct 25, 1999: CAPACITOR. FAULTY. (AUS) LEFT MAGNETO CAPACITOR OPEN CIRCUITED AND POINTS CAM FOLLOWER MELTED.
- [SDR AU990922](https://openairdocs.org/sdr/AU990922), Sep 9, 1999: DOUBLER. CRACKED. (AUS) RUDDER LT AND RT DOUBLER ANGLES CRACKED. CRACK LENGTH LT ANGLE -19.050 MM (0.75 INCH). CRACK LENGTH RT ANGLE - 12.7 MM (0.5 INCH).
- [SDR AU990923](https://openairdocs.org/sdr/AU990923), Sep 9, 1999: SPAR. CRACKED. (AUS) RUDDER SPAR CRACKED. REF: SEE MDR AU990922 FOR FURTHER INFORMATION.
- [SDR 99ZZZX3278](https://openairdocs.org/sdr/99ZZZX3278), Aug 13, 1999: PISTON. DAMAGED. DURING TOP OVERHAUL, NOTICED LOWER EDGE OF PISTON SKIRT ON SUPERIOR SL10545 PISTONS HAD BEEN CONTACTING OPPOSING CONNECTING ROD CAPS AT BOTTOM OF STROKE. THE NE
- [SDR CA990719004](https://openairdocs.org/sdr/CA990719004), Jul 9, 1999: TORQUE TUBE. CORRODED. (CAN) WHEN RUDDER WAS REMOVED FOR PAINTING , IT WAS FOUND THAT THE LOWER ENDS OF THE TORQUE TUBE WERE SEVERELY CORRODED BY STANDING WATER IN TUBE OVER A LONG PE
- [SDR CA990401013](https://openairdocs.org/sdr/CA990401013), Mar 17, 1999: FCU. MALFUNCTIONED. (CAN) THE ENGINE WAS RUNNING ROUGH, IN CRUISE, WITH MOMENTARY LOSS OF POWER. THIS ENGINE HAD BEEN RUNNING INTERMITTENTLY FOR SOME TIME. THE REPLACEMENT OF THE E
- [SDR AU980771](https://openairdocs.org/sdr/AU980771), Jul 9, 1998: SPAR CAP. CORRODED. (AUS) LEFT WING FORWARD MAIN SPAR CAP CONTAINED INTERGRANULAR CORROSION IN AREA ADJACENT TO THE INBOARD AND OUTBOARD EDGES OF THE ENGINE NACELLES. PART TOTAL CY
- [SDR 98ZZZX2671](https://openairdocs.org/sdr/98ZZZX2671), Jun 1, 1998: POINT SET. FAILED. UPON REPORT OF DEAD RIGHT MAGNETO, FOUND CONTACT POINT LOOSE IN POINT SET BODY. OTHERWISE, POINT SET IN EXCELLENT CONDITION.
- [SDR CA980608007](https://openairdocs.org/sdr/CA980608007), May 26, 1998: BLADE. DAMAGE. (CAN) PROPELLER RECEIVED FOR CORROSION INSPECTION. STONE DAMAGE WAS FOUND ON THE BLADE. THE BLADE WAS REPAIRED AND ANODIZED.
- [SDR CA980513001](https://openairdocs.org/sdr/CA980513001), May 1, 1998: CABLE. BROKEN. (CAN) THROTTLE CABLE BROKE DURING FINAL INSPECTION CHECK. CABLE BROKE INSIDE HOUSING CLOSE TO SWAGED END UNDER CLAMP. CABLE FLEXED AT THAT POINT. REPLACED.
- [SDR CA980309008](https://openairdocs.org/sdr/CA980309008), Feb 23, 1998: FORK. LACK OF LUBE. (CAN) PROPELLER RECEIVED FOR CORROSION INSPECTION. PITCH CHANGE FORK FOUND WORN, PROBABLY DUE TO LACK OF LUBRICATION.
- [SDR 98ZZZX2609](https://openairdocs.org/sdr/98ZZZX2609), Dec 17, 1997: BOLT. FAILED. APPEARS THAT THE CONNECTING ROD BOLT FAILED ALLOWING THE CONNECTING ROD TO SEPARATE FROM THE CRANKSHAFT. THE CONNECTING ROD SEPARATED FROM THE CRANKSHAFT SOON A
- [SDR CA970715019](https://openairdocs.org/sdr/CA970715019), Mar 25, 1997: VALVE SEAT. COCKED. (CAN) DURING INSPECTION #6 CYLINDER WAS FOUND TO HAVE ZERO COMPRESSION. ON REMOVAL OF THE CYLINDER IT WAS FOUND THAT THE EXHAUST VALVE SEAT HAD LIFTED AND WAS C
- [SDR AU970486](https://openairdocs.org/sdr/AU970486), Feb 16, 1997: DRIVE BELT. FAILED. (AUS) ALTERNATOR DRIVE BELT FAULTY - PERSONNEL/MAINTENANCE ERROR
- [SDR 97ZZZX13](https://openairdocs.org/sdr/97ZZZX13), Dec 18, 1996: SUMP. CRACKED. THIS SUMP WAS INSTALLED ON AN ENGINE THAT CAME FROM LYCOMING AS A FACTORY OVERHAUL. THERE WOULD BE A SMALL PUDDLE OF OIL UNDER THE ACFT AFTER IT SAT IDLE FOR A 
- [SDR 97ZZZX182](https://openairdocs.org/sdr/97ZZZX182), Sep 4, 1996: HOUSING. BROKEN. AIRCRAFT TACK TIME 2951.81. ENG FAILURE RESULTED IN OFF AIRPORT LANDING CAUSING DAMAGE TO AIRCRAFT OF UNREPAIRABLE AMOUNT. FAILURE CAUSED BY DUAL MAGNETO FALLIN
- [SDR 96ZZZX5130](https://openairdocs.org/sdr/96ZZZX5130), Aug 28, 1996: LINE. FAILED. AIRCRAFT OPERATOR REPORTED ROUGH RUNNING ENGINE. OWNER REMOVED TOP COWL AND FOUND NR 3 FUEL INJECTION LINE COMPLETELY BROKEN OFF AT AND JUST BEHIND WHERE NUT AN
- [SDR 96ZZZX4076](https://openairdocs.org/sdr/96ZZZX4076), Jul 1, 1996: GEAR. FAILED. MAGNETO DISTRIBUTOR GEAR FAILED.
- [SDR 95ZZZX5755](https://openairdocs.org/sdr/95ZZZX5755), Aug 11, 1995: DRAIN TANK. CRACKED. TURBO DRAIN TANK FOUND CRACKED 1.50 INCHES LONG AND OIL LEAKING OUT. CRACK WAS AT BASE OF WELD WHERE MOUNT TUBE IS WELDED TO TANK. SHEET METAL WALL JUST AHEAD O

All 52: https://openairdocs.org/engine/lycoming-tio-540-s1ad/reports.md

## STCs that may be installed (OpenAirDocs) (28)

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 SE2667CE](https://openairdocs.org/stc/SE2667CE): Installation of B&C Specialty Products lightweight (10.2 pounds) engine starter PN BC315-100-2(12 volt) or PN BC315-100-4 (24 volt). B & C Specialty Products Inc
- [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 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 TIO-540 Series
- [STC SE7503SW](https://openairdocs.org/stc/SE7503SW): 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 TIO-540 Series
- [STC SE7668SW](https://openairdocs.org/stc/SE7668SW): Installation of parts listed on Drawing List 8810-3, Rev 6. Continental Motors, Inc. Lists TIO-540 Series
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists TIO-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 SE445GL](https://openairdocs.org/stc/SE445GL): Incorporation of a fuel flow transducer. Shadin Avionics
- [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 SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [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 TIO-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 TIO-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 TIO-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 TIO-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 TIO-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 TIO-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
- [ES10-349328](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID114147850320251216184403.0001): Flat Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349328 · 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
- [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
- [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
- [CFRB9089](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126352418220250312124924.0001): Valve, Poppet Relief. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces RB9089 · Dec 31, 2024
- [AA48111-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120682187320240813134136.0001): Oil Filter. Aero Accessories LLC · PMA PQ1206CE · Replaces Aero AccessoriesAA48111Champion… · Jul 12, 2024
- [202F-1002](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181950454720240701174402.0001): Fuel Pump. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lear RomecRG9570P1/MLycoming… · Jun 20, 2024
- [200F-5005](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136991488520240701174359.0001): Fuel Pump. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lear RomecRG9080J8A/MLycoming… · Jun 20, 2024
- [KA158-06](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID166054207620240919140803.0001): Elbow Assembly. Aerospace Welding Minneapolis, Inc. · PMA PQ2712CE · Replaces LW-15806 · Jun 7, 2024
- [AB-382959](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID193841471720251216184435.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-382959 · Dec 8, 2023
- [AB-51678](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192819677720251216184507.0001): Oil Deflector. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-51678 · Dec 8, 2023
- [ES10-35936-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191691087420251216184428.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-35936-7 · Dec 8, 2023
- [AB-92815-37](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID165115893520251216184504.0001): Retaining Ring. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-92815-37 · Dec 8, 2023
- [AB-349263](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161733554320251216184505.0001): O-Ring. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-349263 · Dec 8, 2023
- [AB-682016](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151464479720251216184447.0001): Magneto Gear Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-682016 · Dec 8, 2023
- [AB-391213](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146344589820251216184434.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-391213 · Dec 8, 2023
- [AB-382788](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID143912317620251216184442.0001): Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-382788 · Dec 8, 2023
- [AB-90788-5](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID138975580920251216184500.0001): Woodruff Key. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-90788-5 · Dec 8, 2023
- [AB-163374](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID138652177520251216184458.0001): Felt Strip. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-163374 · Dec 8, 2023
- [AB-90751-18](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID138224109620251216184503.0001): Cotter Pin. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-90751-18 · Dec 8, 2023
- [AB-86527](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136544385220251216184459.0001): Lubricant. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-86527 · Dec 8, 2023
- [AB-382789](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131202563120251216184436.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-382789 · Dec 8, 2023
- [AB-50752](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125758886020251216184457.0001): Felt Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-50752 · Dec 8, 2023
- [AB-55501](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID122580157220251216184441.0001): Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-55501 · Dec 8, 2023
- [AB-391309](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120647802220251216184443.0001): Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-391309 · Dec 8, 2023
- [AB-14268](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID116974477620251216184440.0001): Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-14268 · Dec 8, 2023
- [AB-53397](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID113466624320251216184442.0001): Washer, Flat. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-53397 · Dec 8, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID189689408720240301172612.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170183424420240301172611.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [ES3413](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID164408705320240301172644.0001): Stud. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 31C-19, M3413 · Dec 1, 2023
- [ES12681](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID143043735220240301172643.0001): Gasket. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces LW12681 · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137841244720240301172609.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID128838889420240301172611.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [KA12997](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117260228820240301172641.0001): Ignition Harness Assy. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M2997,10-821615-20 · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199876966520240301172645.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [ES10‐682000‐4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195310900420240301172650.0001): Housing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental Motors10‐682000‐4 · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID193099993320240301172643.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID193052828920240301172630.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161105397620240301172623.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023

All of them: https://openairdocs.org/engine/lycoming-tio-540-s1ad/pma.md

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.