# NTSB investigations: Lycoming 0-540 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.

Page 1 of 2 · 72 cases

## Latest cases

- [NTSB CEN26LA073](https://openairdocs.org/ntsb/CEN26LA073.md): Rockwell International 114 · Stroud, OK · Accident · Minor injuries · Class 4 · Limited · Final report · Dec 13, 2025 · N5879N · Substantial damage
  > The pilot’s inadequate fuel planning, which resulted in a total loss of power due to fuel exhaustion.
- [NTSB CEN24LA370](https://openairdocs.org/ntsb/CEN24LA370.md): Piper PA-25-235 · Muskogee, OK · Accident · No injuries · Class 4 · Limited · Final report · Sep 26, 2024 · N6548Z · Substantial damage
  > The pilot’s inattention to refueling during turn-around operations which resulted in a loss of engine power due to fuel exhaustion.
- [NTSB CEN24LA122](https://openairdocs.org/ntsb/CEN24LA122.md): Piper PA32 · Tulsa, OK · Accident · No injuries · Class 4 · Limited · Final report · Feb 23, 2024 · N3645W · Substantial damage
  > The pilot's inadvertent retraction of the flaps while landing which resulted in a hard landing and loss of directional control.
- [NTSB CEN23FA360](https://openairdocs.org/ntsb/CEN23FA360.md): Piper PA-24-250 · Oklahoma City, OK · Accident · Serious injuries · Class 3 · Field · Final report · Aug 13, 2023 · N7910P · Substantial damage
  > The pilot’s mismanagement of fuel, which resulted in fuel starvation and a subsequent total loss of engine power.
- [NTSB CEN21LA218](https://openairdocs.org/ntsb/CEN21LA218.md): Cessna R182 · Tulsa, OK · Accident · No injuries · Class 4 · Limited · Final report · May 13, 2021 · N8051B · Substantial damage
  > The pilot’s inability to extend the main landing gear due to incomplete maintenance, which resulted in a partial wheels-up landing and the mechanic’s failure to follow proper maintenance procedures that led to the loss of main landing gear system hydraulic…
- [NTSB CEN18LA075](https://openairdocs.org/ntsb/CEN18LA075.md): Piper PA 28-236 · Tishomingo, OK · Accident · Serious injuries · Limited investigation · Final report · Jan 13, 2018 · N4345K · Substantial damage
  > The pilot’s inadequate preflight fuel planning and in-flight fuel monitoring and his decision to take off with an unverified amount of fuel, which resulted in fuel exhaustion and a subsequent impact with trees during an attempted forced landing.
- [NTSB GAA18CA082](https://openairdocs.org/ntsb/GAA18CA082.md): Piper PA28 · Pocasset, OK · Accident · No injuries · Data collection · Final report · Dec 9, 2017 · N8856W · Substantial damage
  > The pilot’s improper approach path, which resulted in the airplane landing short of the runway.
- [NTSB GAA17CA037](https://openairdocs.org/ntsb/GAA17CA037.md): Piper PA24 · Wagoner, OK · Accident · No injuries · Data collection · Final report · Oct 16, 2016 · N8277P · Substantial damage
  > The pilot's failure to maintain directional control during landing in gusting wind conditions.
- [NTSB CEN15LA238](https://openairdocs.org/ntsb/CEN15LA238.md): Piper PA-25-235 · Omega, OK · Accident · No injuries · Limited investigation · Final report · May 11, 2015 · N7279Z · Substantial damage
  > Improper base metal preparation or contamination of the No. 5 cylinder wall before it was coated, which resulted in the coating peeling off of the cylinder wall and contaminating the engine oil and the subsequent partial loss of engine power.
- [NTSB CEN12LA299](https://openairdocs.org/ntsb/CEN12LA299.md): Piper PA-24-250 · Shawnee, OK · Accident · No injuries · Limited investigation · Final report · May 14, 2012 · N7171P · Substantial damage
  > The improper installation of the mixture cable by maintenance personnel, which allowed the mixture cable to entangle with the landing gear during gear extension and led to the subsequent loss of engine power.
- [NTSB CEN12FA101](https://openairdocs.org/ntsb/CEN12FA101.md): Piper PA-28-235D · Chickasha, OK · Accident · 2 fatal · Field investigation · Final report · Dec 10, 2011 · N999RR · Substantial damage
  > The non-instrument-rated pilot's decision to continue flight into instrument meteorological conditions, which resulted in the pilot’s spatial disorientation and loss of control of the airplane. Contributing to the accident was the pilot’s lack of instrument…
- [NTSB CEN11CA378](https://openairdocs.org/ntsb/CEN11CA378.md): Piper PA-32-260 · Wagoner, OK · Accident · No injuries · Data collection · Final report · Jun 6, 2011 · N3534W · Substantial damage
  > The airplane's collision with a deer during the landing flare and touchdown.
- [NTSB DFW06LA191](https://openairdocs.org/ntsb/DFW06LA191.md): Cessna R182 · McAlester, OK · Accident · No injuries · Limited investigation · Final report · Jul 25, 2006 · N7364T · Destroyed
  > The in-flight fuel leak and fire as result of electrical arcing of a fuel line connecting the engine driven fuel pump and the electric fuel pump.
- [NTSB FTW00LA263](https://openairdocs.org/ntsb/FTW00LA263.md): Piper PA-32-260 · Clinton, OK · Accident · No injuries · Limited investigation · Final report · Jun 3, 2000 · N3869W · Substantial damage
  > The pilot's improper setting of the cockpit fuel selector, which resulted in a total loss of engine power and forced landing.
- [NTSB FTW00LA158](https://openairdocs.org/ntsb/FTW00LA158.md): Cessna 182RG · Sand Springs, OK · Accident · No injuries · Limited investigation · Final report · May 28, 2000 · N736BA · Substantial damage
  > The pilot's failure to maintain directional control during the takeoff. A factor was the fence struck by the aircraft.
- [NTSB FTW00LA018](https://openairdocs.org/ntsb/FTW00LA018.md): Piper PA-24-250 · Oklahoma City, OK · Accident · No injuries · Limited investigation · Final report · Oct 22, 1999 · N6774P · Substantial damage
  > The failure of the pilot to follow the landing checklist and verify that the landing gear was down and locked, which resulted in a wheels up landing. A factor was the failure of the landing gear locking mechanism for an undetermined reason.
- [NTSB FTW96LA358](https://openairdocs.org/ntsb/FTW96LA358.md): Piper PA-28-235 · Tulsa, OK · Accident · Serious injuries · Limited investigation · Final report · Aug 24, 1996 · N8565W · Substantial damage
  > low fluid level in the hydraulic reservoir, due to inadequate maintenance/inspection, which resulted in an inoperative brake system. Factors relating to the accident were: the down sloping runway, and trees at the departure end of the runway.
- [NTSB FTW95LA149](https://openairdocs.org/ntsb/FTW95LA149.md): Piper PA-25-235 · Catoosa, OK · Accident · Minor injuries · Limited investigation · Final report · Mar 30, 1995 · N4900Y · Substantial damage
  > The pilot's failure to maintain terrain and obstacle clearance.
- [NTSB FTW94FA220](https://openairdocs.org/ntsb/FTW94FA220.md): SIAI-Marchetti F.260 · Dover, OK · Accident · 2 fatal · Field investigation · Final report · Jul 5, 1994 · N260MS · Destroyed
  > Failure of the pilot to maintain adequate altitude while performing an aerobatic demonstration. Factors related to the accident were: the pilot's inadequate training, his lack of experience in the type of operation, and insufficient FAA oversight of this type…
- [NTSB FTW94LA126](https://openairdocs.org/ntsb/FTW94LA126.md): Piper PA-25-260 · Muskogee, OK · Accident · Minor injuries · Limited investigation · Final report · Apr 16, 1994 · N4647Y · Substantial damage
  > The pilot's failure to maintain clearance with the power line. Factors were a chemical spray contaminated windscreen, the resultant limitation to visibility, and sun glare.
- [NTSB FTW93FA132](https://openairdocs.org/ntsb/FTW93FA132.md): Piper PA-23-250 · Henryetta, OK · Accident · 1 fatal · Field investigation · Final report · Apr 18, 1993 · N4689P · Destroyed
  > The pilot's decision to fly into known adverse weather conditions and the ensuing spatial disorientation. Factors were the weather, and the pilot's decision to fly into IMC with inadequate flight and navigational equipment installed in the aircraft.
- [NTSB FTW92LA120](https://openairdocs.org/ntsb/FTW92LA120.md): Piper PA-25-235 · Madil, OK · Accident · No injuries · Limited investigation · Final report · Apr 23, 1992 · N7603Z · Substantial damage
  > The pilot's failure to maintain adequate clearance with the wires. A factor was the existing sunglare.
- [NTSB FTW92DPJ02](https://openairdocs.org/ntsb/FTW92DPJ02.md): Piper PA-25 · Warner, OK · Accident · 1 fatal · Final report · Oct 10, 1991 · N8516L · Destroyed
  > The complete loss of engine power for undetermined reason.
- [NTSB FTW91DPJ01](https://openairdocs.org/ntsb/FTW91DPJ01.md): Piper PA-25 · Spiro, OK · Accident · Serious injuries · Final report · Mar 26, 1991 · N9845P · Destroyed
  > A power loss for undetermined reasons. A factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW90LA048](https://openairdocs.org/ntsb/FTW90LA048.md): Piper PA-32-260 · Clinton, OK · Accident · No injuries · Limited investigation · Final report · Dec 28, 1989 · N3809W · Substantial damage
  > Pilots failure to correctly maintain the proper glidepath, which caused him to impact short of the runway.
- [NTSB FTW83FA261](https://openairdocs.org/ntsb/FTW83FA261.md): Piper PA-25-235 · Omega, OK · Accident · 1 fatal · Field investigation · Final report · Jun 4, 1983 · N6551Z · Destroyed
  > The plt had just completed spraying a field & was in a right turn when the right wing tip hit gently rising terrain. The owner thought that the plt might have diverted his attention while looking at a farmer's map to locate the next field. (Several similar…
- [NTSB FTW81FPM21](https://openairdocs.org/ntsb/FTW81FPM21.md): Piper PA-24 · Jenks, OK · Accident · No injuries · Closed · Aug 28, 1981 · N6172P · Substantial damage
- [NTSB FTW81FPM13](https://openairdocs.org/ntsb/FTW81FPM13.md): Piper PA-28 · Tulsa, OK · Accident · Minor injuries · Closed · Jun 20, 1981 · N8510W · Substantial damage
- [NTSB FTW81FPJ09](https://openairdocs.org/ntsb/FTW81FPJ09.md): Piper PA-28 · Enid, OK · Accident · No injuries · Closed · Jan 8, 1981 · N38558 · Substantial damage
- [NTSB FTW81FPJ05](https://openairdocs.org/ntsb/FTW81FPJ05.md): Maule M-5 · Meno, OK · Accident · No injuries · Closed · Nov 2, 1980 · N5638L · Substantial damage
- [NTSB FTW80FPM17](https://openairdocs.org/ntsb/FTW80FPM17.md): Piper PA-25 · Henryetta, OK · Accident · No injuries · Closed · Aug 23, 1980 · N9558P · Substantial damage
- [NTSB FTW80DPM01](https://openairdocs.org/ntsb/FTW80DPM01.md): Maule M-5 · Henryetta, OK · Accident · No injuries · Closed · Oct 9, 1979 · N6194M · Substantial damage
- [NTSB FTW79DPJ31](https://openairdocs.org/ntsb/FTW79DPJ31.md): Piper PA-25 · Hollis, OK · Accident · No injuries · Closed · Jul 27, 1979 · N7756Z · Substantial damage
- [NTSB FTW80DPJ29](https://openairdocs.org/ntsb/FTW80DPJ29-202525.md): Piper PA-25 · Clinton, OK · Accident · No injuries · Closed · Jul 10, 1979 · N9582P · Substantial damage
- [NTSB FTW79DPJ16](https://openairdocs.org/ntsb/FTW79DPJ16.md): Piper PA-25 · Sharon, OK · Accident · No injuries · Closed · May 11, 1979 · N4742Y · Substantial damage
- [NTSB FTW78DPJ15](https://openairdocs.org/ntsb/FTW78DPJ15.md): Piper PA-25 · Tonkawa, OK · Accident · Serious injuries · Closed · Apr 13, 1978 · N8634L · Substantial damage
- [NTSB FTW78FPJ10](https://openairdocs.org/ntsb/FTW78FPJ10.md): Piper PA-32 · Oklahoma City, OK · Accident · No injuries · Closed · Dec 22, 1977 · N3476W · Substantial damage
- [NTSB FTW76DPJ36](https://openairdocs.org/ntsb/FTW76DPJ36.md): Piper PA-24 · Elk City, OK · Accident · No injuries · Closed · Apr 26, 1976 · N6630P · Substantial damage
- [NTSB FTW75DPG14](https://openairdocs.org/ntsb/FTW75DPG14.md): Piper PA-24 · Seiling, OK · Accident · No injuries · Closed · Jan 1, 1975 · N7451P · Substantial damage
- [NTSB FTW75DPJ02](https://openairdocs.org/ntsb/FTW75DPJ02.md): Piper PA-25 · Felt, OK · Accident · No injuries · Closed · Jul 18, 1974 · N6997Z · Substantial damage
- [NTSB FTW74DPJ20](https://openairdocs.org/ntsb/FTW74DPJ20.md): Piper PA-25 · Eldorado, OK · Accident · No injuries · Closed · Jan 30, 1974 · N8848L · Substantial damage
- [NTSB FTW72DPJ13](https://openairdocs.org/ntsb/FTW72DPJ13.md): Piper PA-24 · Midwest City, OK · Accident · No injuries · Closed · Sep 16, 1971 · N5887P · Substantial damage
- [NTSB FTW71FPJ03](https://openairdocs.org/ntsb/FTW71FPJ03.md): Piper J3C-65 · Crawford, OK · Accident · 1 fatal · Closed · Jul 7, 1970 · N30501 · 2 aircraft · Minor damage
- [NTSB FTW70A0044](https://openairdocs.org/ntsb/FTW70A0044.md): Piper PA-24 · Boynton, OK · Accident · 1 fatal · Closed · Dec 31, 1969 · N6011P · Destroyed
- [NTSB FTW70F0209](https://openairdocs.org/ntsb/FTW70F0209.md): Piper PA-24 · Hominy, OK · Accident · No injuries · Closed · Sep 2, 1969 · N5684P · Substantial damage
- [NTSB FTW70D0058](https://openairdocs.org/ntsb/FTW70D0058.md): Piper PA-25 · Guymon, OK · Accident · No injuries · Closed · Jun 19, 1969 · N4631Y · Substantial damage
- [NTSB FTW69F0250](https://openairdocs.org/ntsb/FTW69F0250.md): Piper PA-24 · Oklahoma Cty, OK · Accident · No injuries · Closed · Oct 10, 1968 · N5809P · Substantial damage
- [NTSB FTW69D0153](https://openairdocs.org/ntsb/FTW69D0153.md): Piper PA-24 · Guymon, OK · Accident · No injuries · Closed · Aug 14, 1968 · N6498P · Substantial damage
- [NTSB FTW68D0585](https://openairdocs.org/ntsb/FTW68D0585.md): Piper PA-25 · Terral, OK · Accident · No injuries · Closed · May 5, 1968 · N6918Z · Substantial damage
- [NTSB FTW68D0541](https://openairdocs.org/ntsb/FTW68D0541.md): Piper PA-24 · Hardesty, OK · Accident · Minor injuries · Closed · Mar 29, 1968 · N5631P · Substantial damage

Next page: https://openairdocs.org/ntsb.md?engine=41532&state=OK&page=2

## 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 ('41532'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41532&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.