# Lycoming TEO-540-C1A - Type: Engine model (FAA registry) - Registry code: 42715 - Manufacturer (registry): LYCOMING - Model: TEO-540-C1A - Engine type: Reciprocating - Power: 375 hp - Data sheet: [TCDS E00009NY](https://openairdocs.org/tcds/E00009NY) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 44 registered aircraft - Page: https://openairdocs.org/engine/lycoming-teo-540-c1a 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 Effective Apr 8, 2026 Historical (superseded or no longer in force): - [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and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 ## Information bulletins (advisory) (1) - [SAIB NE-19-08](https://openairdocs.org/saib/NE-19-08): Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders. Issued May 2, 2019 ## Registered aircraft (44) - [N1202P](https://openairdocs.org/aircraft/N1202P): [Pacific Air Charters Inc](https://openairdocs.org/faa-owner/PACIFIC%20AIR%20CHARTERS%20INC), [Honolulu, HI](https://openairdocs.org/faa-place/HI/Honolulu), built 2023, S/N 056/US - [N1203P](https://openairdocs.org/aircraft/N1203P): [Pacific Air Charters Inc](https://openairdocs.org/faa-owner/PACIFIC%20AIR%20CHARTERS%20INC), [Honolulu, HI](https://openairdocs.org/faa-place/HI/Honolulu), built 2023, S/N 057/US - [N1214P](https://openairdocs.org/aircraft/N1214P): [Pacific Air Charters Inc](https://openairdocs.org/faa-owner/PACIFIC%20AIR%20CHARTERS%20INC), [Honolulu, HI](https://openairdocs.org/faa-place/HI/Honolulu), built 2023, S/N 061/US - [N133CA](https://openairdocs.org/aircraft/N133CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2019, S/N 003/US - [N135CA](https://openairdocs.org/aircraft/N135CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 034/US - [N212US](https://openairdocs.org/aircraft/N212US): [Tecnam US Inc](https://openairdocs.org/faa-owner/TECNAM%20US%20INC), [Sebring, FL](https://openairdocs.org/faa-place/FL/Sebring), built 2021, S/N 029/US - [N230AV](https://openairdocs.org/aircraft/N230AV): [Tvpx Ars Inc Trustee](https://openairdocs.org/faa-owner/TVPX%20ARS%20INC%20TRUSTEE), [North Salt Lake, UT](https://openairdocs.org/faa-place/UT/North%20Salt%20Lake), built 2021, S/N 030 - [N235CD](https://openairdocs.org/aircraft/N235CD): [Air Data Solutions LLC](https://openairdocs.org/faa-owner/AIR%20DATA%20SOLUTIONS%20LLC), [Natchitoches, LA](https://openairdocs.org/faa-place/LA/Natchitoches), built 2022, S/N 043/US - [N235KG](https://openairdocs.org/aircraft/N235KG): [Air Data Solutions LLC](https://openairdocs.org/faa-owner/AIR%20DATA%20SOLUTIONS%20LLC), [Natchitoches, LA](https://openairdocs.org/faa-place/LA/Natchitoches), built 2025, S/N 080/US - [N244US](https://openairdocs.org/aircraft/N244US): [N944ca LLC](https://openairdocs.org/faa-owner/N944CA%20LLC), [Port Angeles, WA](https://openairdocs.org/faa-place/WA/Port%20Angeles), built 2022, S/N 044/US - [N255CA](https://openairdocs.org/aircraft/N255CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2019, S/N 005/US - [N255US](https://openairdocs.org/aircraft/N255US): [Clear Aviation Holdings LLC](https://openairdocs.org/faa-owner/CLEAR%20AVIATION%20HOLDINGS%20LLC), [St Thomas, VI](https://openairdocs.org/faa-place/VI/St%20Thomas), built 2022, S/N 055/US - [N260US](https://openairdocs.org/aircraft/N260US): [Alaska Transportation Company LLC](https://openairdocs.org/faa-owner/ALASKA%20TRANSPORTATION%20COMPANY%20LLC), [Bremerton, WA](https://openairdocs.org/faa-place/WA/Bremerton), built 2023, S/N 060/US - [N266CA](https://openairdocs.org/aircraft/N266CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2019, S/N 006/US - [N288CA](https://openairdocs.org/aircraft/N288CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2019, S/N 007/US - [N335CA](https://openairdocs.org/aircraft/N335CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 035/US - [N345CA](https://openairdocs.org/aircraft/N345CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 036/US - [N357CA](https://openairdocs.org/aircraft/N357CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 037/US - [N396CA](https://openairdocs.org/aircraft/N396CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 040/US - [N401CJ](https://openairdocs.org/aircraft/N401CJ): [Tecnam US Inc](https://openairdocs.org/faa-owner/TECNAM%20US%20INC), [Sebring, FL](https://openairdocs.org/faa-place/FL/Sebring), built 2022, S/N 049/US - [N411CA](https://openairdocs.org/aircraft/N411CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2019, S/N 008/US - [N443CA](https://openairdocs.org/aircraft/N443CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 031/US - [N503SA](https://openairdocs.org/aircraft/N503SA): [Aspen Helicopters Inc](https://openairdocs.org/faa-owner/ASPEN%20HELICOPTERS%20INC), [Oxnard, CA](https://openairdocs.org/faa-place/CA/Oxnard), built 2022, S/N 041/US - [N504SA](https://openairdocs.org/aircraft/N504SA): [Southern Airways Express LLC](https://openairdocs.org/faa-owner/SOUTHERN%20AIRWAYS%20EXPRESS%20LLC), [Addison, TX](https://openairdocs.org/faa-place/TX/Addison), built 2022, S/N 048/US - [N507TA](https://openairdocs.org/aircraft/N507TA): [Tecnam U S Inc](https://openairdocs.org/faa-owner/TECNAM%20U%20S%20INC), [Sebring, FL](https://openairdocs.org/faa-place/FL/Sebring), built 2025, S/N 075/US - [N508CA](https://openairdocs.org/aircraft/N508CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 038/US - [N566CA](https://openairdocs.org/aircraft/N566CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 009/US - [N577TV](https://openairdocs.org/aircraft/N577TV): [Tennessee Valley Authority](https://openairdocs.org/faa-owner/TENNESSEE%20VALLEY%20AUTHORITY), [Muscle Shoals, AL](https://openairdocs.org/faa-place/AL/Muscle%20Shoals), built 2025, S/N 077/US - [N651CA](https://openairdocs.org/aircraft/N651CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 039/US - [N699CA](https://openairdocs.org/aircraft/N699CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 010/US - [N722CA](https://openairdocs.org/aircraft/N722CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 012/US - [N743CA](https://openairdocs.org/aircraft/N743CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 032/US - [N785CA](https://openairdocs.org/aircraft/N785CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 021/US - [N833CA](https://openairdocs.org/aircraft/N833CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 014/US - [N843CA](https://openairdocs.org/aircraft/N843CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2021, S/N 033/US - [N915CA](https://openairdocs.org/aircraft/N915CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 022/US - [N929CA](https://openairdocs.org/aircraft/N929CA): [Hyannis Air Serive Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERIVE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 015/US - [N945CA](https://openairdocs.org/aircraft/N945CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 024/US - [N949CA](https://openairdocs.org/aircraft/N949CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 016/US - [N965CA](https://openairdocs.org/aircraft/N965CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 025/US - [N969CA](https://openairdocs.org/aircraft/N969CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 018/US - [N979CA](https://openairdocs.org/aircraft/N979CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 019/US - [N989CA](https://openairdocs.org/aircraft/N989CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 020/US - [N995CA](https://openairdocs.org/aircraft/N995CA): [Hyannis Air Service Inc](https://openairdocs.org/faa-owner/HYANNIS%20AIR%20SERVICE%20INC), [Hyannis, MA](https://openairdocs.org/faa-place/MA/Hyannis), built 2020, S/N 026/US ## 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 ERA25LA060](https://openairdocs.org/ntsb/ERA25LA060), Nov 25, 2024: Costruzioni Aeronautiche Tecna P2012 Traveller (N651CA), Boston, MA, substantial damage. Probable cause: The tug crew’s inadequate visual lookout while towing an airplane at night and their failure to identify a stationary airplane within sufficient time/distance to stop. - [NTSB DCA22LA131](https://openairdocs.org/ntsb/DCA22LA131), Jun 16, 2022: Costruzioni Aeronautiche Tecna P2012 Traveller (N833CA), Chicago, IL, substantial damage. Probable cause: The accident airplane encountered jet blast from a departing Boeing 737. ## 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. - [Incident 20231020015229I](https://openairdocs.org/incident/20231020015229I), Oct 20, 2023: Costruzioni Aeronautiche Tecna P2012 TRAVELLER (N212US), No damage. Aircraft operating under part 135 departed kenai in VFR conditions at approximately 14:30 LCL time. Ten minutes in to the flight, all the primary displays in… - [Incident 20230914013349I](https://openairdocs.org/incident/20230914013349I), Sep 14, 2023: Costruzioni Aeronautiche Tecna P2012 TRAVELLER (N212US), Kenai, AK, No damage. Pilot departed paen at 04:00 local time. Operations were conducted under part 135. Aircraft departed from paen on an IFR flight plan to panc. Approximtely 10… - [Accident 20220616006309A](https://openairdocs.org/incident/20220616006309A), Jun 16, 2022: Costruzioni Aeronautiche Tecna P2012 TRAVELLER (N833CA), Chicago, IL, Substantial damage. Aircraft holding short runway 28R at taxiway N5 kord. [privacy data omitted] 737 Had taxied into position on runway 28R via taxiway N5 and began takeoff roll.… ## Service difficulty reports (39) As reported by operators and repair stations, by the model named in the report. - [SDR HYIA20261006003](https://openairdocs.org/sdr/HYIA20261006003), Oct 1, 2026: EXHAUST PIPE. CRACKED. DURING ROUTINE INSPECTION, MAINTENANCE FOUND THE LEFT ENGINE OUTBOARD EXHAUST ELBOW WAS CRACKED. THE PART WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20261006001](https://openairdocs.org/sdr/HYIA20261006001), Sep 30, 2026: EXHAUST PIPE. CRACKED. DURING ROUTINE INSPECTION, MAINTENANCE FOUND THE LEFT ENGINE EXHAUST TRANSITION PIPE WAS CRACKED. THE PART WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20261006002](https://openairdocs.org/sdr/HYIA20261006002), Sep 30, 2026: EXHAUST PIPE. CRACKED. DURING ROUTINE INSPECTION, MAINTENANCE FOUND THE RIGHT ENGINE EXHAUST TURBO TRANSITION PIPE WAS CRACKED. THE PART WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20260917001](https://openairdocs.org/sdr/HYIA20260917001), Sep 15, 2026: EXHAUST PIPE. BROKEN. DURING TROUBLESHOOTING FOR A FUEL FILTER DISCREPANCY; MAINTENANCE FOUND RT EXHAUST ELBOW BROKEN AT TRANSITION FLANGE AND FUEL FILTER BYPASS SWITCH FAILED AS A R - [SDR HYIA20260917002](https://openairdocs.org/sdr/HYIA20260917002), Sep 10, 2026: CYLINDER. CRACKED. DURING NORMAL INSPECTION THE #1 CYLINDER ON THE RIGHT ENGINE WAS FOUND TO BE CRACKED. THE CYLINDER WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20260522001](https://openairdocs.org/sdr/HYIA20260522001), May 14, 2026: GOVERNOR. FAULTED. PILOT REPORTED AN UN-COMMANDED FEATHER ON THE RIGHT ENGINE. MAINTENANCE INSPECTED RH PROP AND FOUND NO DEFECTS NOTED AT THIS TIME. REMOVED RH PROP GOVERNOR AND - [SDR HYIA20260508002](https://openairdocs.org/sdr/HYIA20260508002), May 5, 2026: EXHAUST PIPE. CRACKED. DURING SCHEDULED INSPECTION IT WAS NOTED THE LEFT ENGINE EXHAUST TRANSITION PIPE WAS CRACKED IN THE CENTER. THE TRANSITION PIPE WAS REPLACED WITH NO FURTHER DEF - [SDR HYIA20260508003](https://openairdocs.org/sdr/HYIA20260508003), May 5, 2026: CYLINDER. OIL CONSUMPTION. DURING SCHEDULED INSPECTION IT WAS NOTED THE LEFT ENGINE #1 CYLINDER HAD AN OIL FOULED PLUG AND EXCESSIVE OIL IN THE CYLINDER. THE #1 CYLINDER WAS REPLACED WITH - [SDR HYIA20260430001](https://openairdocs.org/sdr/HYIA20260430001), Apr 27, 2026: CYLINDER. FAILED INSP. CREW REPORTED THE RIGHT ENGINE HAD AN OIL LEAK. MAINTENANCE INSPECTED THE ENGINE, BORESCOPED THE CYLINDERS AND FOUND THE #5 CYLINDER TO HAVE EXCESSIVE OIL POOLI - [SDR HYIA20260430004](https://openairdocs.org/sdr/HYIA20260430004), Apr 23, 2026: EXHAUST PIPE. BROKEN. DURING AN ENGINE CHANGE, THE LEFT EXHAUST PIPE WAS FOUND TO BE CRACKED. THE PIPE WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20260508005](https://openairdocs.org/sdr/HYIA20260508005), Apr 16, 2026: EXHAUST PIPE. CRACKED. DURING SCHEDULED INSPECTION MAINTENANCE FOUND THE LEFT ENGINE TURBO TRANSITION PIPE CRACKED. THE TRANSITION PIPE WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20260424003](https://openairdocs.org/sdr/HYIA20260424003), Apr 12, 2026: STUD. BROKEN. PILOT REPORTED DURING CRUISE, THE LEFT ENGINE ONLY PRODUCING 59% POWER AT 2100 RPM. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE #6 CYLINDER TO HAVE TWO BROK - [SDR HYIA20260424002](https://openairdocs.org/sdr/HYIA20260424002), Apr 11, 2026: BELT. FAILED. PILOT REPORTED LEFT AND RIGHT ALTERNATOR FAILURES IN FLIGHT. MAINTENANCE INSPECTED AND FOUND FOUND BOTH ALTERNATOR BELTS TO HAVE FAILED. LEFT AND RIGHT ALTERNAT - [SDR HYIA20260410001](https://openairdocs.org/sdr/HYIA20260410001), Apr 8, 2026: EXHAUST PIPE. BROKEN. PILOT REPORTED LEFT ENGINE NOT PRODUCING FULL POWER AT 2500 FT, 28" MP AND 2515 RPM. MAINTENANCE INSPECTED AND FOUND THE LEFT REAR EXHAUST PIPE FLANGE BROKEN LE - [SDR HYIA20260410002](https://openairdocs.org/sdr/HYIA20260410002), Apr 6, 2026: CYLINDER. LOW PRESSURE. PILOT REPORTED EXCESSIVE ENGINE VIBRATION DURING TAKE OFF AND CRUISE. MAINTENANCE INSPECTED AND FOUND THE #6 CYLINDER DEAD, THE CYLINDER WAS REPLACED ALONG WITH - [SDR HYIA20260508004](https://openairdocs.org/sdr/HYIA20260508004), Apr 6, 2026: EXHAUST PIPE. CRACKED. DURING SCHEDULED INSPECTION MAINTENANCE FOUND THE LEFT ENGINE EXHAUST TRANSITION PIPE IS CRACKED. THE TRANSITION PIPE WAS REPLACED WITH NO FURTHER DEFECTS NOTED - [SDR HYIA20260430003](https://openairdocs.org/sdr/HYIA20260430003), Mar 24, 2026: WYE PIPE. CRACKED. DURING SCHEDULED INSPECTION MAINTENANCE FOUND THE LEFT ENGINE EXHAUST TRANSITION PIPE CRACKED. THE TRANSITION WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20260327009](https://openairdocs.org/sdr/HYIA20260327009), Mar 20, 2026: SENSOR. DEFECTIVE. PILOT REPORTED ON CLIMB RIGHT ENGINE SURGING FOLLOWED BY RED LOW FUEL PRESSURE CAS MESSAGE WITH UNCONTROLLABLE YAW, THE PILOT FEATHERED THE PROP AND RETURNED TO - [SDR HYIA20260327008](https://openairdocs.org/sdr/HYIA20260327008), Feb 27, 2026: CRANKCASE. CRACKED. DURING INSPECTION, WHILE TROUBLESHOOTING AN OIL LEAK, A CRACK FOUND IN THE ENGINE CRANK CASE. THE ENGINE WAS REPLACED WITH NO FURTHER DEFECTS NOTED. - [SDR HYIA20260327007](https://openairdocs.org/sdr/HYIA20260327007), Feb 26, 2026: EXHAUST VALVE. FAILED. PILOT REPORTED RIGHT ENGINE HIGH EGT DURING CRUISE FLIGHT. MAINTENANCE INSPECTED AND FOUND THE NR 4 EXHAUST VALVE CHIPPED NEAR VALVE SEAT. THE CYLINDER WAS REPL - [SDR HYIA20260327006](https://openairdocs.org/sdr/HYIA20260327006), Feb 17, 2026: CYLINDER. SCORED. DURING INSPECTION IT WAS FOUND THE NR 3 CYLINDER ON THE LEFT ENGINE HAD SCORING ON THE CYLINDER WALLS CAUSED BY A BROKEN OIL CONTROL RING. THE CYLINDER WAS REPL - [SDR HYIA20260327005](https://openairdocs.org/sdr/HYIA20260327005), Feb 9, 2026: INTAKE VALVE. FAILED. PILOT REPORTED THE RIGHT ENGINE CHT & EGT DROPPED RAPIDLY, ALONG WITH FUEL PRESSURE, AS WELL AS AIRCRAFT YAW AND ENGINE ROUGHNESS. MAINTENANCE INSPECTED AND FOU - [SDR HYIA20260206001](https://openairdocs.org/sdr/HYIA20260206001), Feb 5, 2026: EXHAUST PIPE. BROKEN. DURING INVESTIGATION OF PILOT REPORT FOR SMOKE IN THE COCKPIT IT WAS DISCOVERED THE LEFT ENGINE RIGHT EXHAUST PIPE HAD BROKEN, WHICH CAUSED DAMAGE TO A TKS LINE - [SDR HYIA20260327004](https://openairdocs.org/sdr/HYIA20260327004), Jan 14, 2026: ENGINE. MAKING METAL. PILOT REPORTED LEFT ENGINE LOW OIL PRESSURE, WHICH DROPPED INTO THE RED DURING LANDING. MAINTENANCE INSPECTED AND FOUND METAL CONTAMINATION IN THE LEFT ENGINE A - [SDR HYIA20260327003](https://openairdocs.org/sdr/HYIA20260327003), Nov 5, 2025: CASE. CRACKED. DURING TROUBLESHOOTING FOR AN OIL LEAK DURING SCHEDULED INSPECTION, A CRACK IN THE ENGINE CASE WAS FOUND IN THE AREA OF THE #1-CYLINDER BOTTOM MOUNT. THIS ENGIN - [SDR HYIA20260327002](https://openairdocs.org/sdr/HYIA20260327002), Oct 26, 2025: NUT. BROKEN. DURING TROUBLESHOOTING FOR A HIGH OIL CONSUMPTION CONCERN, IT WAS DISCOVERED THE RH ENG #2 CYLINDER BASE NUTS 1/2 IN. #3 AND 3/8 # 2,3,4 BROKEN AND MISSING FROM - [SDR HYIA20250326001](https://openairdocs.org/sdr/HYIA20250326001), Mar 17, 2025: ENGINE. SHUTDOWN. APPROXIMATELY 30 MINUTES INTO THE FLIGHT, THE LT ENGINE DROPPED TO 15" MAP AND THEN RETURNED TO 36" MAP ~3 TIMES. AFTER ~10 MORE SECONDS THE LT ENGINE MAP DROPP - [SDR HYIA20250106001](https://openairdocs.org/sdr/HYIA20250106001), Jan 1, 2025: FIRE DETECTOR. FAILED. PILOT REPORTED ON APPROACH THE LEFT FIRE CAS MESSAGE APPEARED, THERE WERE NO OTHER FIRE INDICATIONS AND UPON LANDING THE MESSAGE EXTINGUISHED. MAINTENANCE INSPE - [SDR HYIA20240711003](https://openairdocs.org/sdr/HYIA20240711003), Jul 2, 2024: ENGINE. OVERSPEED. THROUGH REVIEW OF ENGINE PERFORMANCE DATA IT WAS DISCOVERED THE RIGHT ENGINE WAS OVER SPED BY MORE THAN 10% DURING FLIGHT TRAINING DOING BACK-TO-BACK PRACTICES - [SDR HYIA20240524001](https://openairdocs.org/sdr/HYIA20240524001), May 19, 2024: BELT. LOOSE. PILOT REPORTED RIGHT ALTERNATOR CIRCUIT BREAKER POPPED WHICH RESULTED IN COMPLETE ELECTRICAL FAILURE, EMERGENCY BATTER WAS USED AND THE AIRCRAFT DIVERTED AND LA - [SDR HYIA20240319001](https://openairdocs.org/sdr/HYIA20240319001), Mar 14, 2024: CYLINDER. FAILED. PILOT REPORTED ROUGH ENGINE AND SMOKE COMING FROM THE EXHAUST. MAINTENANCE INSPECTED AND FOUND CYLINDER #3 EXHAUST ROCKER ARM PIN RETAINING COVER HAD FALLEN OFF - [SDR HYIA20230928002](https://openairdocs.org/sdr/HYIA20230928002), Sep 27, 2023: STUD. SHEARED. DURING ROUTINE INSPECTION THE NUMBER ONE CYLINDER THROUGH STUD WAS FOUND TO BE SHEARED. THE ENGINE IS BEING REPLACED. - [SDR HYIA20230928001](https://openairdocs.org/sdr/HYIA20230928001), Sep 19, 2023: STUD. SHEARED. DURING ROUTINE INSPECTION THE NUMBER ONE CYLINDER THROUGH STUD WAS FOUND TO BE SHEARED. THE ENGINE IS BEING REPLACED. - [SDR HYIA20230912005](https://openairdocs.org/sdr/HYIA20230912005), Sep 7, 2023: CYLINDER. FAILED. PILOT REPORTED BLACK AND GREY SMOKE FROM RIGHT ENGINE EXHAUST. MAINTENANCE INSPECTED AND FOUND THE RIGHT ENGINE #5 CYLINDER OIL SOAKED. CYLINDER WAS REPLACED. - [SDR HYIA20230912004](https://openairdocs.org/sdr/HYIA20230912004), Sep 6, 2023: CYLINDER. FAILED. PILOT REPORTED LEFT OIL PRESSURE DROPPED IN FLIGHT WITH BLACK SMOKE. MAINTENANCE INSPECTED AND FOUND EXCESSIVE OIL IN THE LEFT ENGINE #4 CYLINDER. REPLACED CYLI - [SDR HYIA20230912003](https://openairdocs.org/sdr/HYIA20230912003), Sep 3, 2023: UNKNOWN. UNKNOWN. PILOT REPORTED RIGHT ENGINE OIL PRESSURE OSCILLATING FROM 72-38 PSI IN FLIGHT. MAINTENANCE INSPECTED AND FOUND ALL CYLINDER BORES COATED WITH OIL AND CYLINDER W - [SDR HYIA20230512001](https://openairdocs.org/sdr/HYIA20230512001), May 9, 2023: SENSOR. FAILED. PILOT REPORTED LEFT ENGINE LOST FUEL PRESSURE WHEN CLIMBING THROUGH 7000 FEET. CREW NOTICED IT WAS WHEN THE LEFT FUEL PUMP WOULD CYCLE ON AUTOMATICALLY AND THE - [SDR HYIA20230511001](https://openairdocs.org/sdr/HYIA20230511001), May 5, 2023: SOLENOID VALVE. FAILED. LEFT PRIMARY AND SECONDARY NTO LIGHT ILLUMINATED WITH 40% POWER REDUCTION. MAINTENANCE INSPECTED AND FOUND A WASTEGATE DRIVER OUTPUT FAILURE. MAINTENANCE REPLAC - [SDR HYIA20230511002](https://openairdocs.org/sdr/HYIA20230511002), May 4, 2023: UNKNOWN. UNKNOWN. PILOT REPORTED LEFT ENGINE EGT, CHT & TIT ABNORMALLY LOW DURING FINE, AND HEAVY BLACK SMOKE FROM LEFT ENGINE DURING FINAL. CREW ALSO NOTED OIL LEAK ON LEFT ENGI ## STCs that may be installed (OpenAirDocs) (1) 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 SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc --- 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.