# Lycoming O-540-E4C5 - Type: Engine model (FAA registry) - Registry code: 42391 - Manufacturer (registry): LYCOMING - Model: O-540-E4C5 - Engine type: Reciprocating - Power: 250 hp - Data sheet: [TCDS E-295](https://openairdocs.org/tcds/E-295) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 15 registered aircraft - Page: https://openairdocs.org/engine/lycoming-o-540-e4c5 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 2026-17-10](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 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 2012-03-07](https://openairdocs.org/ad/2012-03-07): Carburetor · Lycoming Engines GO-435, GO-435-C2 (O-435-17), GO-435-C2A and 389 more. Effective Mar 27, 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 2009-26-12](https://openairdocs.org/ad/2009-26-12): Cylinder assemblies · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 264 more. Effective Feb 4, 2010 - [AD 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 2007 - [AD 2006-12-07](https://openairdocs.org/ad/2006-12-07): ECi cylinder assemblies · Aerostar AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 386 more. Effective Jul 11, 2006 - [AD 2006-10-21](https://openairdocs.org/ad/2006-10-21): ECi connecting rods · Engine Components Reciprocating Engine Connecting Rods, AEIO-360-B1B, AEIO-360-B1D and 171 more. Effective Jun 22, 2006 - [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 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 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 87-10-06 R1](https://openairdocs.org/ad/87-10-06-R1): Rocker Arm Assembly · Lycoming Engines IO-360-B4, IVO-360-A1A, O-340-A1A and 243 more. Effective Sep 1, 1989 - [AD 89-04-02](https://openairdocs.org/ad/89-04-02): Carburetors · Continental Motors O-470-11, O-470-11-CI, O-470-11B and 175 more. Effective Mar 8, 1989 - [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 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969 - [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 - [AD 64-16-05](https://openairdocs.org/ad/64-16-05): AC Pumps · Lycoming Engines HIO-360-B1A, HIO-360-B1B, IO-320-B1A and 86 more. Effective Jul 10, 1964 - [AD 63-22-03](https://openairdocs.org/ad/63-22-03): Carburetors · Continental Motors GO-300-A, GO-300-B, GO-300-C and 143 more. Effective Dec 2, 1963 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 2008-19-05](https://openairdocs.org/ad/2008-19-05) (historical): Parallel Valve'' reciprocating engines · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 262 more. Effective Oct 20, 2008 - [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 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) (6) - [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-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 (15) - [N142JH](https://openairdocs.org/aircraft/N142JH): [Paroaria LLC](https://openairdocs.org/faa-owner/PAROARIA%20LLC), [Williamsville, NY](https://openairdocs.org/faa-place/NY/Williamsville), built 2008, S/N 40454 - [N298TA](https://openairdocs.org/aircraft/N298TA): [Islander Holdings Ltd](https://openairdocs.org/faa-owner/ISLANDER%20HOLDINGS%20LTD), [Fort Lauderdale, FL](https://openairdocs.org/faa-place/FL/Fort%20Lauderdale), built 1974, S/N 711 - [N324TA](https://openairdocs.org/aircraft/N324TA): [Islander Holdings Ltd](https://openairdocs.org/faa-owner/ISLANDER%20HOLDINGS%20LTD), [Fort Lauderdale, FL](https://openairdocs.org/faa-place/FL/Fort%20Lauderdale), built 1980, S/N 892 - [N519LG](https://openairdocs.org/aircraft/N519LG): [Sawtooth Flying Service Inc](https://openairdocs.org/faa-owner/SAWTOOTH%20FLYING%20SERVICE%20INC), [Mccall, ID](https://openairdocs.org/faa-place/ID/Mccall), built 1977, S/N 2005 - [N6238C](https://openairdocs.org/aircraft/N6238C): [Klusman Paul J](https://openairdocs.org/faa-owner/KLUSMAN%20PAUL%20J), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita), built 1996, S/N TB3260 - [N864VL](https://openairdocs.org/aircraft/N864VL): [Vieques Air Link Inc](https://openairdocs.org/faa-owner/VIEQUES%20AIR%20LINK%20INC), [San Juan, PR](https://openairdocs.org/faa-place/PR/San%20Juan), built 1974, S/N 712 - [N865VL](https://openairdocs.org/aircraft/N865VL): [San Juan, PR](https://openairdocs.org/faa-place/PR/San%20Juan), built 1987, S/N 2125, Sale reported - [N881GL](https://openairdocs.org/aircraft/N881GL): [Actualized Business Solutions Inc DBA](https://openairdocs.org/faa-owner/ACTUALIZED%20BUSINESS%20SOLUTIONS%20INC%20DBA), [California, MD](https://openairdocs.org/faa-place/MD/California), built 1968, S/N 84 - [N907GD](https://openairdocs.org/aircraft/N907GD): [Air Charter Inc DBA](https://openairdocs.org/faa-owner/AIR%20CHARTER%20INC%20DBA), [Culebra, PR](https://openairdocs.org/faa-place/PR/Culebra), built 1973, S/N 340 - [N908GD](https://openairdocs.org/aircraft/N908GD): [Corpus Terra Investments LLC](https://openairdocs.org/faa-owner/CORPUS%20TERRA%20INVESTMENTS%20LLC), [Hialeah, FL](https://openairdocs.org/faa-place/FL/Hialeah), built 1988, S/N 2040 - [N908VL](https://openairdocs.org/aircraft/N908VL): [Blue Waters Air Charters LLC](https://openairdocs.org/faa-owner/BLUE%20WATERS%20AIR%20CHARTERS%20LLC), [San Juan, PR](https://openairdocs.org/faa-place/PR/San%20Juan), built 1984, S/N 2187 - [N910VL](https://openairdocs.org/aircraft/N910VL): [Blue Waters Air Chaters LLC](https://openairdocs.org/faa-owner/BLUE%20WATERS%20AIR%20CHATERS%20LLC), [San Juan, PR](https://openairdocs.org/faa-place/PR/San%20Juan), built 1969, S/N 058 - [N913GD](https://openairdocs.org/aircraft/N913GD): [Air Charter Inc DBA](https://openairdocs.org/faa-owner/AIR%20CHARTER%20INC%20DBA), [Culebra, PR](https://openairdocs.org/faa-place/PR/Culebra), built 1970, S/N 198 - [N920GD](https://openairdocs.org/aircraft/N920GD): [Air Charter Inc DBA](https://openairdocs.org/faa-owner/AIR%20CHARTER%20INC%20DBA), [Culebra, PR](https://openairdocs.org/faa-place/PR/Culebra), built 1979, S/N 1044 - [N921GD](https://openairdocs.org/aircraft/N921GD): [Air Charter Inc DBA](https://openairdocs.org/faa-owner/AIR%20CHARTER%20INC%20DBA), [Culebra, PR](https://openairdocs.org/faa-place/PR/Culebra), built 1974, S/N 420 ## NTSB investigations (2) 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 ERA26LA137](https://openairdocs.org/ntsb/ERA26LA137), Feb 22, 2026: Pilatus Britten-Norman BN-2B-27 (N865VL), Isla de Culebra, PR, substantial damage, investigation ongoing - [NTSB ERA14LA007](https://openairdocs.org/ntsb/ERA14LA007), Oct 6, 2013: Britten-Norman BN-2A-8 (N909GD), Culebra, PR, substantial damage, 1 fatal. Probable cause: The pilot's failure to maintain airplane control for reasons that could not be determined because the wreckage was not recovered. ## FAA accident and incident reports (2) 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 20260222005659A](https://openairdocs.org/incident/20260222005659A), Feb 22, 2026: Pilatus Britten-Norman Limited BN-2B-27 (N865VL), Culebra, PR, Substantial damage. On February 22, 2026, [privacy data omitted], a BN-2B had a collision with the airport drainage system while taxiing after landing. The aircraft had a brake… - [Accident 20131006025009A](https://openairdocs.org/incident/20131006025009A), Oct 6, 2013: Britten-Norman BN-2A-8 (N909GD), Culebra, PR, Destroyed, 1 fatal. At 0500 LCL on 10/06/2013 a BN2A islander N909GD departed tjcp in order to initiate a newspaper cargo flight under 14 CFR part 135. Planned route of flight was… ## Service difficulty reports (139, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR 2026F00125](https://openairdocs.org/sdr/2026F00125), Jun 16, 2026: RUDDER. NO DISCREPANCY. THE PILOT DEPARTED RWY 9 ON THE SUNNY TRANSITION TO VQS AND AT APPROXIMATELY 1 MILE NORTH OF PUNTA LAS MARIAS, THE PIC DECIDED TO RETURN TO SIG DUE TO STIFFNESS - [SDR 2025F00229](https://openairdocs.org/sdr/2025F00229), Aug 15, 2025: ENGINE. FAILED. FLT NUMBER: DVR023, ENGINE FAILURE AND EMERGENCY LANDING. SHORTLY AFTER DEPARTURE FROM BON, THE CREW EXPERIENCED A LOSS OF FUEL PRESSURE AND OBSERVED A DECREASI - [SDR UOIA202507020001](https://openairdocs.org/sdr/UOIA202507020001), Jul 2, 2025: IDLER GEAR. DAMAGED. PILOT REPORTED THAT DURING CRUISE FLIGHT FROM TJIG TO TJCP LEFT ENGINE OIL PRESSURE STARTED DROPPING AND AFTER A FEW SECONDS PROPELLER FETHERED BY ITSELF AND EN - [SDR UOIA202506300001](https://openairdocs.org/sdr/UOIA202506300001), Jun 30, 2025: SPARK PLUG. FAULTED. DURING CLIMB PILOT NOTICED LEFT ENGINE SOUNDED ROUGH AND DECIDED TO RETUN TO THE AIRPORT AS PRECAUTION. UPON EXAMINATION MAINTENANCE PERFORMED LEFT ENGINE COLD - [SDR 2025F00108](https://openairdocs.org/sdr/2025F00108), Apr 25, 2025: SHAFT. BROKEN. AT LANDING IN VIEQUES AIRPORT RIGHT ENGINE PRESENTED EXESIVE VIBRATION, PILOT PERFORMED PREVENTIVE SHUTDOWN. ENGINE WAS INSPECTED AND FOUND THE PROPELLER GOVERN - [SDR UOIA2025042500006](https://openairdocs.org/sdr/UOIA2025042500006), Apr 25, 2025: SHAFT. BROKEN. AT LANDING IN VIEQUES AIRPORT RIGHT ENGINE PRESENTED EXCESSIVE VIBRATION SO PILOT PERFORMED PREVENTIVE SHUTDOWN. ENGINE WAS INSPECTED AND FOUND THE PROPELLER GO - [SDR VLIA202406250001](https://openairdocs.org/sdr/VLIA202406250001), Jun 21, 2024: BRAKE DISC. CRACKED. DURING THE LANDING ROLL WHEN BRAKES WHERE APPLIED THE R/H BRAKE BEGIN TO DRAG. UPON INSPECTION FOUND THE R/H LANDING GEAR OUTBOARD WHEEL DISC CRACK. - [SDR UOIA2023041200006](https://openairdocs.org/sdr/UOIA2023041200006), Apr 12, 2023: MASTER CYLINDER. BLOCKED. AFTER LANDING LOSS BRAKE ACTION. - [SDR UOIA2023012800005](https://openairdocs.org/sdr/UOIA2023012800005), Jan 28, 2023: CRANKSHAFT. BROKEN. AFTER LANDING IN CULEBRA, RIGHT ENGINE QUIT ON TAXI TO THE RAMP. ENGINE WAS INSPECTED AND THE ENGINE CRANKSHAFT IDLE GEAR FOUND BROKEN. ENGINE WAS REMOVED AND R - [SDR UOIA2022112200004](https://openairdocs.org/sdr/UOIA2022112200004), Nov 22, 2022: CONTROL CABLE. LACK OF LUBE. LEFT PROPELLER GETTING STUCK INTERMITTENT. - [SDR 2022F00331](https://openairdocs.org/sdr/2022F00331), Aug 29, 2022: NONE. NONE. LEFT ENGINE SURGING PRECAUTIONARY SHUT DOWN. - [SDR 2021F00092](https://openairdocs.org/sdr/2021F00092), Apr 28, 2021: GEAR. BROKEN. PILOT PERFORMED PRE FLIGHT MAGNETO CHECK. THE LH MAG WAS INOPERATIVE. FURTHER INSPECTION BY MX PERSONNEL DISCOVERED THE LH MAGNETO DRIVE GEAR WAS MISSING 3 TEET - [SDR UOIA2020111300002](https://openairdocs.org/sdr/UOIA2020111300002), Nov 12, 2020: GOVERNOR. DAMAGED. LOSS OF RPM ON TAKEOFF. - [SDR UOIA2020071400001](https://openairdocs.org/sdr/UOIA2020071400001), Jul 14, 2020: CYLINDER. DAMAGED. ENGINE LOST POWER. - [SDR UOIA2019009130000](https://openairdocs.org/sdr/UOIA2019009130000), Sep 7, 2019: CRANKSHAFT. FAILED. ENGINE CRANKSHAFT GEAR FAILURE. - [SDR UOIA2017080300001](https://openairdocs.org/sdr/UOIA2017080300001), Aug 3, 2017: CALIPER. BROKEN. RIGHT BRAKE FAILED TO OPERATED, THE AIRCRAFT GO OUT OF RUNWAY. - [SDR UOIA201703070001](https://openairdocs.org/sdr/UOIA201703070001), Jul 3, 2017: SHAFT. BROKEN. RIGHT PROPELLER GOES TO FEATHER CONDITION. PROPELLER GOVERNOR SHAFT BROKEN. - [SDR UOIA20170803](https://openairdocs.org/sdr/UOIA20170803), Mar 8, 2017: RUDDER. INOPERATIVE. DURING FLIGHT RUDDERS STOPPED RESPONDING. - [SDR UOIA201606131114](https://openairdocs.org/sdr/UOIA201606131114), Jun 10, 2016: CALIPER. LEAKING. LOST RT BRAKES EMERGING THE RUNWAY FOR TAKEOFF. R & R RT MAIN INBD CALIPER AND LINING. - [SDR UOIA201510071114](https://openairdocs.org/sdr/UOIA201510071114), Oct 6, 2015: STUD. BROKEN. LEFT ENG CYLINDER NR 3 CRANKCASE STUDS BROKEN. - [SDR RI9A20150809001](https://openairdocs.org/sdr/RI9A20150809001), Aug 3, 2015: STARTER. BINDING. BENDIX ON STARTER OF RT ENGINE FAILED TO DISENGAGE AFTER STARTUP. R & R STARTER WITH NEW. NO FURTHER DISCREPANCIES NOTED. - [SDR LU4R2015020618118](https://openairdocs.org/sdr/LU4R2015020618118), Feb 3, 2015: BLADE. CRACKED. PROPELLER BLADE FOUND CRACKED AT SHANK. - [SDR WS9R2015FA0000008](https://openairdocs.org/sdr/WS9R2015FA0000008), Dec 22, 2014: CRANKSHAFT. BROKEN. ENGINE RECEIVED FOR O/H DUE TO HIGH METAL. DURING DISASSEMBLY, IT WAS DISCOVERED THAT A PIECE OF THE CHEEK ON THE CRANKSHAFT HAD BROKEN OFF ALLOWING THE COUNTER - [SDR UOIA20141114001](https://openairdocs.org/sdr/UOIA20141114001), Nov 12, 2014: STUD. BROKEN. RIGHT ENG CYLINDER BASE NR 3 STUDS BROKEN. - [SDR UOIA2014FA0000525](https://openairdocs.org/sdr/UOIA2014FA0000525), Sep 9, 2014: CYLINDER. CRACKED. LEFT ENGINE, CYLINDER 2, CENTER AREA CRACKED. - [SDR CA140506002](https://openairdocs.org/sdr/CA140506002), May 5, 2014: ADAPTER. CRACKED. (CAN) AIRCRAFT IS AN AMATEUR BUILT, ENGINE AND SUBJECT OIL FILTER ADAPTER ARE USED ON MANY CERTIFIED ACFT. DURING ANNUAL INSPECTION SUBSTANTIAL OIL LEAK WAS NOT - [SDR CA140204009](https://openairdocs.org/sdr/CA140204009), Jan 20, 2014: SPRING. BROKEN. (CAN) DURING 100HR INSPECTION, FOUND SPRING BROKEN ON INTAKE VALVE LT ENGINE. - [SDR ISCA2014F00011](https://openairdocs.org/sdr/ISCA2014F00011), Oct 4, 2013: CASE. DAMAGED. PILOT REPORTED THAT ON DOWNWIND IN THE TRAFFIC PATTERN AT THE DESTINATION AIRPORT, HEARD A LOUD "POP", AND AND EXPERIENCED A POWER LOSS ON LT ENGINE. NOTICED OI - [SDR ISCA2013111400001](https://openairdocs.org/sdr/ISCA2013111400001), Oct 4, 2013: RETAINER. DISINTEGRATED. PILOT REPORTED THAT ON DOWNWIND, IN TRAFFIC PATTERN AT DESTINATION AIRPORT, HEARD A LOUD "POP," AND EXPERIENCED A POWER LOSS ON THE LT ENGINE. ALSO NOTICED OIL - [SDR 2013FA0000584](https://openairdocs.org/sdr/2013FA0000584), Oct 1, 2013: CASE. CRACKED. WHILE TROUBLESHOOTING ROUGH RUNNING ENGINE ON MORNING RUNUP, ENGINE CASE FOUND WITH LARGE CRACK UNDER THE NR 2 CYLINDER, ENGINE REMOVED FROM SERVICE. - [SDR CA130516009](https://openairdocs.org/sdr/CA130516009), May 1, 2013: ROD END. LOOSE. (CAN) ROD END BEARING NOTED TO BE MOVING DUE TO LOOSE TAPER PINS IN FWD END OF RUDDER DRIVE ROD. ROD REPAIRED AND RE-INSTALLED. - [SDR RI9A20120807557](https://openairdocs.org/sdr/RI9A20120807557), Aug 5, 2012: CRANKCASE. CRACKED. PILOT HEARD RIGHT ENGINE RUNNING ROUGH AND SAW THE OIL PRESSURE DROP. SHUT THE ENGINE DOWN AND MADE A SAFE LANDING AT OUZINKIE AIR STRIP. UPON INSPECTION FOUND - [SDR RI9A20120617001](https://openairdocs.org/sdr/RI9A20120617001), Jun 6, 2012: REGULATOR. MALFUNCTIONED. PILOT SMELLED ODOR AND SAW SMOKE FROM INSTRUMENT PANEL. PILOT RETURNED TO KODIAK AIRPORT WITHOUT INCIDENT AND MADE A NORMAL LANDING. ON INVESTIGATION, IT WAS FO - [SDR RI9A2012FA0000125](https://openairdocs.org/sdr/RI9A2012FA0000125), Feb 20, 2012: CASE. DAMAGED. PILOT EXPERIENCED AN ROUGH RUNNING LT ENGINE 20 MINUTES INTO THE FLIGHT. THE PILOT REPORTED THAT ALL LT ENGINE INSTRUMENT INDICATIONS WERE NORMAL AT THAT TIME. - [SDR CA111207006](https://openairdocs.org/sdr/CA111207006), Nov 27, 2011: ALTERNATOR. FAILED. (CAN) NOTED ALTERNATOR OUT LIGHT DURING RUNUP. LT ALTERNATOR WAS FOUND SEIZED AND DISCOLORED BY HIGH TEMPERATURE. ALTERNATOR BELT WAS ALSO FOUND BROKEN. ALTERNA - [SDR UOI2011F00001](https://openairdocs.org/sdr/UOI2011F00001), Apr 7, 2011: BOLT. BROKEN. BOLT DAMAGE, IDLER GEAR SHAFT BOLT. - [SDR ISCA2011022201](https://openairdocs.org/sdr/ISCA2011022201), Feb 18, 2011: RETAINING NUT. FAILED. IN CRUISE FLT, AT 2500 FT AGL & APPROX 15 MILES FROM DESTINATION, PILOT NOTED A SLIGHT VIBRATION ON STARBOARD (RT) ENG FOLLOWED BY A LOUD BANG. IN RESPONSE, PIL - [SDR UOI2011F00000](https://openairdocs.org/sdr/UOI2011F00000), Dec 31, 2010: DRIVE ASSY. WORN. (ENGINE INTERNAL) PROPELLER GOVERNOR DRIVE DAMAGE. - [SDR CA100723007](https://openairdocs.org/sdr/CA100723007), Jul 23, 2010: IMPULSE COUPLING. BROKEN. MAG WAS RECEIVED DUE TO SEIZED CONDITION. UNKNOWN WHEN IT OCCURRED DURING ENG OPERATION. 1 IMPULSE FLYWEIGHT WAS FOUND BROKEN AWAY FROM IMPULSE ASSY AND WEDGED - [SDR CA090119013](https://openairdocs.org/sdr/CA090119013), Jan 18, 2009: SLEEVE. LOOSE. ON GROUND RUN IT WAS DISCOVERED THAT CYLINDER NR 5 ON THE RIGHT ENGINE, EGT WAS NOTICABLY HIGHER THAN OTHER CYLINDERS. INDUCTION TUBE WAS REMOVED FROM THE CYLIN - [SDR CA081015002](https://openairdocs.org/sdr/CA081015002), Oct 6, 2008: SPRING. BROKEN. (CAN) DURING INSPECTION OF LYCOMING SB 388C FOUND BROKEN INNER SPRING PART NR AEL11795 ON INTAKE AND EXHAUST VALVE. - [SDR G0C2008F00000](https://openairdocs.org/sdr/G0C2008F00000), Jul 3, 2008: CYLINDER HEAD. SEPARATED. NR 5 CYLINDER FAILED DUE TO CYLINDER HEAD SEPARATION FROM BARREL. AC IMMEDIATELY DIVERTED TO NEAREST AIRFIELD FOR REPAIR. AC LANDED SAFELY, POWER SETTING AT FAI - [SDR CA080608003](https://openairdocs.org/sdr/CA080608003), Jun 3, 2008: NUT. STRIPPED. (CAN) DURING A TRAINING FLIGHT, ON OVERSHOOT FROM A ABORTED LANDING, FLAPS RETRACTED UN-COMMANDED. PILOT REDUCED POWER AND WAS ABLE TO LAND STRAIGHT AHEAD ON RE - [SDR FFKA020108125](https://openairdocs.org/sdr/FFKA020108125), Feb 1, 2008: DRIVE SHAFT. SHEARED. PILOT REPORTED A LOSS OF ENGINE RPM CONTROL (RUNAWAY PROP). AFTER REPLACING THE PROPELLER GOVERNOR AND THE PROPELLER THERE WAS STILL NO PROP CONTROL. MAINTENANC - [SDR CA070202008](https://openairdocs.org/sdr/CA070202008), Jan 30, 2007: COLLAR. BROKEN. (CAN) NOSE LANDING GEAR STEERING COLLAR, BROKE IN TWO PIECES DURING GROUND HANDLING. COLLAR CRACKED AFT GREASE FITTING HOLE ANF FWD RT RELEASE DOG SLOT. (TC NR - [SDR 2006F00037](https://openairdocs.org/sdr/2006F00037), Aug 31, 2006: BEARING. WORN. ON SCHEDULED INSPECTION FOUND VERY SMALL METAL PARTICLES IN OIL FILTER, NONE FOUND IN FINGER SCREEN. REMOVED ENGINE AND SEND FOR INSPECTION AND REPAIR. AFTER CO - [SDR CA070126004](https://openairdocs.org/sdr/CA070126004), Aug 31, 2006: OIL COOLER. CRACKED. (CAN) OIL LEAK AROUND CASTING PORT ON THE OIL COOLER ASSEMBLY. (TC NR 20070126004) - [SDR CA070126003](https://openairdocs.org/sdr/CA070126003), Jul 5, 2006: MAGNETO. LOOSE. (CAN) ROUGH RUNNING ON RUNUP. FOUND ATTACHMENT FLANGE ON MAGNETO LOOSE. (TC NR 20070126003) - [SDR CA060702001](https://openairdocs.org/sdr/CA060702001), Jun 13, 2006: WHEEL. CRACKED. (CAN) ON TAXI AFTER LDG, A VIBRATION WAS NOTED ORIGINATION ON THE LH LDG GEAR. IT WAS ORIGINALLY THOUGHT TO BE A WHEEL OUT OF BALANCE. ON INSPECTION, A CRACK WA - [SDR AU510002180](https://openairdocs.org/sdr/AU510002180), Dec 12, 2005: VALVE. MISMANUFACTURED. (AUS) CARBURRETOR MIXTURE VALVE FAULTY MANUFACTURE. INSPECTION FOUND THE BRASS VALVE END OF THE MIXTURE VALVE ASSEMBLY HAD NOT BEEN CORRECTLY SWAGED CAUSING THE All 139: https://openairdocs.org/engine/lycoming-o-540-e4c5/reports.md ## STCs that may be installed (OpenAirDocs) (40) 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 SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC - [STC SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. B & C Specialty Products Inc - [STC SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive. Alcor LLC. Lists O-540 Series - [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com. Lists O-540 Series - [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 SE2388CE](https://openairdocs.org/stc/SE2388CE): Installation of B&C Speciality Products lightweight (10.2) pounds) engine starter, part number BC-315-100-1 (12 volts) or part number BC-315-100-3 (24 volts). B & C Specialty Products Inc. Lists O-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 SE40WE](https://openairdocs.org/stc/SE40WE): Installation of two Roto-Master Turbochargers Model No. 3DT5FF10J2, P/N 600572-00 (formerly Rayjay Model No. 315F10 P/N RJ0080-100, -101, 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 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 O-540 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists O-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 O-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 O-540 Series - [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee - [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 - [STC SE8193SW](https://openairdocs.org/stc/SE8193SW): Grind nitriden high compression cylinder barrles to plus .010 oversize and install SL75089 P10 piston, SL74242 P10 compression ring, and SL73857 P10 oil ring. Superior Air Parts Inc - [STC SE7734SW](https://openairdocs.org/stc/SE7734SW): Modification of engine for operation with ethanol fuel. Shauck Dr Maxwell E Jr - [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 SE00890LA](https://openairdocs.org/stc/SE00890LA): Installation of Nickson's cylinder barrels on Lycoming reciprocating engine models. Nickson's Machine Shop Inc. Lists O-540 Series - [STC SE1-201](https://openairdocs.org/stc/SE1-201): Installation of the Richter Aero Equipment Type B-4 or B-5 Temperature Probe. (O-360 SERIES (excl. A1C, C2B, C2D)). MidContinent Instru Co Inc. Lists O-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 O-540 Series - [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co. Lists O-540 Series - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists O-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 O-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 O-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 O-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 O-540 Series - [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists O-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 O-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 O-540 Series - [STC SA01436DE](https://openairdocs.org/stc/SA01436DE) (historical): Installation of Firewall Forward Technologies, LLC modified camshaft. Centri-Lube Technologies LLC --- 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.