# NTSB investigations: Lycoming IO-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 CEN23LA268](https://openairdocs.org/ntsb/CEN23LA268.md): Velocity Velocity XL · Tahlequah, OK · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 27, 2023 · N340XL · Substantial damage
  > A total loss of engine power for undetermined reasons.
- [NTSB GAA19CA554](https://openairdocs.org/ntsb/GAA19CA554.md): Piper PA32R · Owasso, OK · Accident · No injuries · Data collection · Final report · Sep 16, 2019 · N6887J · Substantial damage
  > The pilot's improper altitude and airspeed control during landing, which resulted in the airplane landing long and a subsequent runway overrun and impact with a drainage culvert.
- [NTSB CEN13TA441](https://openairdocs.org/ntsb/CEN13TA441.md): Cessna 182S · Tecumseh, OK · Accident · Serious injuries · Final report · Jul 27, 2013 · N820HP · Substantial damage
  > The pilot's inadvertent aerodynamic stall at a low altitude, which resulted in a loss of control and impact with terrain.
- [NTSB CEN11LA275](https://openairdocs.org/ntsb/CEN11LA275.md): Piper PA-32-300 · Oklahoma City, OK · Accident · No injuries · Limited investigation · Final report · Apr 7, 2011 · N31407 · Substantial damage
  > The loss of aircraft control due to the failure of the stabilator control cable turnbuckle.
- [NTSB CEN11CA197](https://openairdocs.org/ntsb/CEN11CA197.md): Piper PA-32R-301 · Holdenville, OK · Accident · No injuries · Data collection · Final report · Feb 20, 2011 · N8310L · Substantial damage
  > The pilot’s decision to land with a tailwind and his delay in executing a go around.
- [NTSB CEN10LA043](https://openairdocs.org/ntsb/CEN10LA043.md): Moore Skybolt/BM · Altus, OK · Accident · 2 fatal · Limited investigation · Final report · Nov 8, 2009 · N6644 · Destroyed
  > The pilot's poor judgment by performing intentional low-level maneuvers that resulted in an inadvertent stall/spin at an altitude to low to affect a safe recovery.
- [NTSB DFW08CA136](https://openairdocs.org/ntsb/DFW08CA136.md): Piper PA-36 · Thomas, OK · Accident · No injuries · Data collection · Final report · May 9, 2008 · N2368Y · Substantial damage
  > The disconnected throttle linkage resulting in the loss of engine power during takeoff-initial climb. A factor contributing to the accident was the muddy forced landing site.
- [NTSB DFW06CA033](https://openairdocs.org/ntsb/DFW06CA033.md): Piper PA-23-250 · Bixby, OK · Accident · No injuries · Data collection · Final report · Nov 23, 2005 · N859DA · Substantial damage
  > The loss of engine power due to water contamination and corrosion in both gascolators due to improper maintenance. A factor was the lack of suitable terrain for the forced landing.
- [NTSB DFW05CA072](https://openairdocs.org/ntsb/DFW05CA072.md): Robinson R44 II · Woodward, OK · Accident · No injuries · Data collection · Final report · Apr 13, 2005 · N7535S · Substantial damage
  > the pilot's encounter with adverse weather conditions.
- [NTSB FTW03FA120](https://openairdocs.org/ntsb/FTW03FA120.md): Piper PA-32-300 · Broken Arrow, OK · Accident · 3 fatal · Field investigation · Final report · Mar 31, 2003 · N70NZ · Destroyed
  > Failure of the engine due to the blow-by condition in the number six cylinder for undetermined reasons, which resulted in oil starvation and eventual failure of the associated connecting rod end cap. Also causal was the pilot's failure to maintain airspeed…
- [NTSB FTW94LA283](https://openairdocs.org/ntsb/FTW94LA283.md): Walton Skybolt · Collinsville, OK · Accident · 2 fatal · Limited investigation · Final report · Aug 27, 1994 · N113BW · Destroyed
  > The pilot's failure to maintain airspeed resulting in an inadvertent stall.
- [NTSB FTW91LA032](https://openairdocs.org/ntsb/FTW91LA032.md): Piper PA-32R-301 · Enid, OK · Accident · No injuries · Limited investigation · Final report · Jan 23, 1991 · N82162 · Substantial damage
  > The mechanical failure of the ignition switch. A factor was the pilot's failure to apply the parking brake or use airplane wheel chocks.
- [NTSB FTW87FA123](https://openairdocs.org/ntsb/FTW87FA123.md): Piper PA-32R-301 · Porter, OK · Accident · 2 fatal · Field investigation · Final report · May 23, 1987 · N81796 · Destroyed
  > Acft was observed in a rt bank when it experienced an inflt breakup. Both wings, vert stab and rudder, and the horz stab and trim tab separated prior to impact. Wx was dark night with scattered to broken cloud cover, but VFR. Although a wx rpt 33 NM northwest…
- [NTSB FTW87LA089](https://openairdocs.org/ntsb/FTW87LA089.md): Piper PA-32RT-300 · Laverne, OK · Accident · No injuries · Limited investigation · Final report · Apr 1, 1987 · N31681 · Substantial damage
  > During a downwind landing, the aircraft ran off the end of the runway contacting a barbed wire fence and subsequently a muddy field, substantially damaging the aircraft by shearing the landing gear off and tearing the wings on the top and bottom surfaces.
- [NTSB FTW85FA137](https://openairdocs.org/ntsb/FTW85FA137.md): Piper PA-23-250 · Foss, OK · Accident · 1 fatal · Field investigation · Final report · Mar 5, 1985 · N6310U · Destroyed
  > Inflt fire at rear of lft eng caused by fitting of inlet fuel line to eng driven fuel pump being more than 1 & 1/2 turns from finger tight plt was A&P mech and did maint on a/c and had helped install lft eng 19.8 hrs prior to accident. Lft wing separated…
- [NTSB FTW80DPJ25](https://openairdocs.org/ntsb/FTW80DPJ25.md): Callair A-9B · Ponca City, OK · Accident · No injuries · Closed · Jun 4, 1980 · N7798V · Substantial damage
- [NTSB FTW79FPJ07](https://openairdocs.org/ntsb/FTW79FPJ07.md): Rockwell 114 · Billings, OK · Accident · No injuries · Closed · Mar 11, 1979 · N4740W · Substantial damage
- [NTSB FTW73FPM16](https://openairdocs.org/ntsb/FTW73FPM16.md): Aero Comdr A-9B · Hallett, OK · Accident · No injuries · Closed · Jun 13, 1973 · N7650V · 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 ('41530', '41585'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41530&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.