# NTSB investigations: Lycoming TI0-540 series, OK

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB CEN26LA170](https://openairdocs.org/ntsb/CEN26LA170.md): Piper PA 31P 350 · Ardmore, OK · Accident · Minor injuries · Class 4 · Limited · Final report · Apr 17, 2026 · N9262Y · Substantial damage
  > The pilot’s failure to maintain control of the airplane while landing on a wet runway with a tailwind.
- [NTSB CEN25LA192](https://openairdocs.org/ntsb/CEN25LA192.md): Piper PA-32RT-300T · Tulsa, OK · Accident · Serious injuries · Class 3 · Limited · Preliminary report · May 30, 2025 · N130XR · Substantial damage
  > On May 30, 2025, about 1627 central daylight time, a Piper PA-32RT-300T airplane, N130XR, was substantially damaged when it was involved in an accident near Tulsa, Oklahoma. The pilot sustained serious injuries, and the pilot-rated passenger sustained minor…
- [NTSB CEN23LA370](https://openairdocs.org/ntsb/CEN23LA370.md): Piper PA31 · Durant, OK · Accident · No injuries · Class 3 · Limited · Final report · Aug 21, 2023 · N3589X · Substantial damage
  > The loosening of a connecting rod cap nut for reasons that could not be determined, which resulted in a mechanical failure of the engine and an in-flight fire.
- [NTSB CEN20CA074](https://openairdocs.org/ntsb/CEN20CA074.md): Piper PA32 · Kingfisher, OK · Accident · No injuries · Data collection · Final report · Feb 3, 2020 · N711PF · Substantial damage
  > The pilot's improper continuation of a landing in which he landed too far down the runway at too high a speed, which resulted in a loss of directional control and a runway excursion.
- [NTSB CEN17LA292](https://openairdocs.org/ntsb/CEN17LA292.md): Piper PA 46 350P · Tahlequah, OK · Accident · Minor injuries · Limited investigation · Final report · Jul 30, 2017 · N786MD · Substantial damage
  > The total loss of engine power, which resulted from fatigue failure of two engine through bolts and the No. 2 cylinder attachment studs due to the lack of sufficient clamping force.
- [NTSB CEN17LA019](https://openairdocs.org/ntsb/CEN17LA019.md): Bellanca 17-31A · Mc Alester, OK · Accident · Serious injuries · Limited investigation · Final report · Oct 16, 2016 · N93668 · Substantial damage
  > A total loss of engine power during initial climb due to fuel starvation.
- [NTSB CEN14FA434](https://openairdocs.org/ntsb/CEN14FA434.md): Piper PA 32-300 · Ardmore, OK · Accident · 1 fatal · Field investigation · Final report · Aug 16, 2014 · N4125W · Substantial damage
  > The partial loss of engine power for reasons that could not be determined because thermal damage to the engine prevented a complete examination.
- [NTSB CEN12LA134](https://openairdocs.org/ntsb/CEN12LA134.md): Aero Commander 500-B · Bartlesville, OK · Accident · Minor injuries · Limited investigation · Final report · Jan 14, 2012 · N524HW · Substantial damage
  > The total loss of engine power due to fuel exhaustion and the pilot’s inadequate preflight inspection, which did not correctly identify the airplane’s fuel quantity before departure.
- [NTSB CEN09FA562](https://openairdocs.org/ntsb/CEN09FA562.md): Piper PA-32R-300 · Tulsa, OK · Accident · 5 fatal · Field investigation · Final report · Sep 5, 2009 · N1228H · Destroyed
  > The non-instrument-rated pilot’s decision to attempt flight in instrument meteorological conditions, which resulted in spatial disorientation and an in-flight collision with a radio tower guy wire.
- [NTSB DFW08LA176](https://openairdocs.org/ntsb/DFW08LA176.md): Piper PA-32RT-300T · Cookson, OK · Accident · Minor injuries · Limited investigation · Final report · Jun 29, 2008 · N132RR · Substantial damage
  > The partial loss of engine power during initial takeoff climb for undetermined reasons. Contributing to the accident was the lack of suitable terrain for the forced landing.
- [NTSB DFW08FA056](https://openairdocs.org/ntsb/DFW08FA056.md): Aero Commander 500B · Tulsa, OK · Accident · 1 fatal · Field investigation · Final report · Jan 17, 2008 · N712AT · Substantial damage
  > The pilot's loss of control due to spatial disorientation and the pilot exceeding the design/stress limits of the aircraft. Factors contributing to the accident were the pilot's reported gyro problem, the dark night conditions, and prevailing instrument…
- [NTSB DFW05LA081](https://openairdocs.org/ntsb/DFW05LA081.md): Piper PA-23-250 · Westport, OK · Accident · No injuries · Limited investigation · Final report · Mar 5, 2005 · N33AC · Substantial damage
  > The collapsing of the right main landing gear as a result of the failure of the scissors assembly.
- [NTSB FTW02LA257](https://openairdocs.org/ntsb/FTW02LA257.md): Smith Aerostar 601P · Piedmont, OK · Accident · No injuries · Limited investigation · Final report · Sep 16, 2002 · N90652 · Substantial damage
  > A fuel leak at the left boost pump to bladder tank flange, which resulted in fuel exhaustion and the subsequent loss of power to both engines.
- [NTSB FTW02LA052](https://openairdocs.org/ntsb/FTW02LA052.md): Piper PA-23-250 · Duncan, OK · Accident · Serious injuries · Limited investigation · Final report · Dec 13, 2001 · N127CA · Substantial damage
  > The pilot's descent below the minimum descent altitude, and his failure to maintain obstacle clearance. Contributing factors were the below approach/landing minimum weather, the dark night conditions, and the inoperative REIL's.
- [NTSB FTW99FA199](https://openairdocs.org/ntsb/FTW99FA199.md): Smith, Ted Aerostar Aerostar 601P · Bethany, OK · Accident · 2 fatal · Field investigation · Final report · Jul 23, 1999 · N345LS · Destroyed
  > The pilot's failure to maintain the minimum controllable airspeed. A factor was the disconnected rubber interconnect boot, which resulted in the partial loss of left engine power.
- [NTSB FTW89LA087](https://openairdocs.org/ntsb/FTW89LA087.md): Piper PA-32-300 · Eufaula, OK · Accident · No injuries · Limited investigation · Final report · Apr 26, 1989 · N8654N · Substantial damage
  > The pilot's improper positioning of the fuel selector, which resulted in a loss of power due to fuel starvation, and his failure to followed the emergency procedure. A factor related to the accident was: rough terrain in the emergency landing area.
- [NTSB FTW88IA147](https://openairdocs.org/ntsb/FTW88IA147.md): Piper PA-31-350 · Oklahoma City, OK · Incident · No injuries · Incident investigation · Final report · Aug 10, 1988 · N3589B · Minor damage
  > The flight was an instructional flight with three pilots onboard. The airplane departed on runway 17R and was 300 to 400 feet AGL when one blade of the right propeller separated from the hub, followed by the remainder of the propeller. The PIC made an…
- [NTSB FTW86IA103](https://openairdocs.org/ntsb/FTW86IA103.md): Piper PA-31 · Kingston, OK · Incident · No injuries · Incident investigation · Final report · Jun 10, 1986 · N68ST · Minor damage
  > Acft received minor damage as a result of an electrical fire in-flight while in cruise at 9,000' MSL. The plt stated that he observed smoke emanating from the c.b. panel mounted on the left side wall of the cockpit and that several c.b.'s popped and he lost…
- [NTSB FTW84LA192](https://openairdocs.org/ntsb/FTW84LA192.md): Rockwell A-9B · Lamont, OK · Accident · No injuries · Limited investigation · Final report · Apr 6, 1984 · N7776V · Substantial damage
  > The plt reported that between swath runs, his attention was directed to swath marks on the ground, then he tried to determine how much chemical was remaining in the hopper. At about 100 ft AGL, while in a 50 deg left bank, he heard 'the eng slow down' & felt…
- [NTSB FTW83FPM04](https://openairdocs.org/ntsb/FTW83FPM04.md): Piper PA23-250 · 8 Miles Se Bris, OK · Accident · 2 fatal · Final report · Nov 11, 1982 · N6145Y · Destroyed
  > The acft departed at 2220 with a planned enroute stop at holdenville, OK. 55 minutes later the acft crashed approximately 8.5 miles from its original departure point. Witnesses describe the wx as very bad due to heavy rain & fog.
- [NTSB FTW80FA020](https://openairdocs.org/ntsb/FTW80FA020.md): Piper PA-32 · Harrah, OK · Accident · Serious injuries · Closed · Dec 5, 1979 · N4097R · Destroyed
- [NTSB FTW78IA074](https://openairdocs.org/ntsb/FTW78IA074.md): Piper PA-32 · Enid, OK · Incident · No injuries · Closed · Sep 4, 1978 · N4106W · Minor damage
- [NTSB FTW78FPJ09](https://openairdocs.org/ntsb/FTW78FPJ09.md): Piper PA-24 · Oklahoma City, OK · Accident · No injuries · Closed · Dec 14, 1977 · N8636P · Substantial damage
- [NTSB FTW76AF069](https://openairdocs.org/ntsb/FTW76AF069.md): Piper PA-24 · Alva, OK · Accident · 2 fatal · Closed · Mar 11, 1976 · N16MD · Destroyed
- [NTSB FTW76FPJ21](https://openairdocs.org/ntsb/FTW76FPJ21.md): Piper PA-32 · Stroud, OK · Accident · No injuries · Closed · Dec 31, 1975 · N8640N · Substantial damage
- [NTSB FTW72DPM20](https://openairdocs.org/ntsb/FTW72DPM20.md): Piper PA-32 · Grove, OK · Accident · No injuries · Closed · Feb 26, 1972 · N2772P · Substantial damage
- [NTSB FTW71FPJ09](https://openairdocs.org/ntsb/FTW71FPJ09.md): Piper PA-24 · Oklahoma Cty, OK · Accident · No injuries · Closed · Aug 4, 1970 · N8840P · Substantial damage
- [NTSB FTW70DPM10](https://openairdocs.org/ntsb/FTW70DPM10.md): Piper PA-24 · Mead, OK · Accident · No injuries · Closed · May 23, 1970 · N8915P · Substantial damage
- [NTSB FTW69A0059](https://openairdocs.org/ntsb/FTW69A0059.md): Piper PA-24 · Clayton, OK · Accident · 2 fatal · Closed · Feb 22, 1969 · N8745P · Destroyed
- [NTSB FTW68F0160](https://openairdocs.org/ntsb/FTW68F0160.md): Piper PA-24 · Okla-City, OK · Accident · No injuries · Closed · Aug 27, 1967 · N8545P · Substantial damage
- [NTSB FTW68F0158](https://openairdocs.org/ntsb/FTW68F0158.md): Piper PA-24 · Mangum, OK · Accident · No injuries · Closed · Aug 22, 1967 · N8721P · Substantial damage
- [NTSB FTW66F0077](https://openairdocs.org/ntsb/FTW66F0077.md): Piper PA-24 · Tulsa, OK · Accident · No injuries · Closed · May 22, 1965 · N8670P · Substantial damage

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."eventStateOrRegion" = 'OK' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41533'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41533&state=OK

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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.