# NTSB investigations: Lycoming IO-320 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 CEN26LA248](https://openairdocs.org/ntsb/CEN26LA248.md): Piper PA-30 · Tulsa, OK · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Jul 9, 2026 · N8154Y · Substantial damage > On July 9, 2026, about 1729 central daylight time, a Piper PA-30 airplane, N8154Y, was substantially damaged when it was involved in an accident near Tulsa, Oklahoma. The flight instructor and pilot under instruction were seriously injured. The airplane was… - [NTSB CEN22FA145](https://openairdocs.org/ntsb/CEN22FA145.md): Piper PA-30 · Pond Creek, OK · Accident · 3 fatal · Class 3 · Field · Final report · Mar 17, 2022 · N8357Y · Destroyed > The pilot’s loss of control of the airplane, resulting in an in-flight breakup. - [NTSB CEN11FA434](https://openairdocs.org/ntsb/CEN11FA434.md): Schaffer Gary W Lancair · Yukon, OK · Accident · 1 fatal · Field investigation · Final report · Jun 30, 2011 · N358MA · Substantial damage > The pilot's use of an excessive bank angle while in the airport traffic pattern, which resulted in an accelerated stall. Contributing to the accident were the pilot’s lack of experience in the airplane and the pilot’s distracted attention to the rough running… - [NTSB DFW05FA015](https://openairdocs.org/ntsb/DFW05FA015.md): Piper PA-30 · Boise City, OK · Accident · 1 fatal · Field investigation · Final report · Nov 5, 2004 · N7415Y · Substantial damage > The pilot's incapacitation (cardiovascular) resulting in a loss of aircraft control. - [NTSB FTW99FA222](https://openairdocs.org/ntsb/FTW99FA222.md): Piper PA30 · Holdenville, OK · Accident · 1 fatal · Field investigation · Final report · Aug 16, 1999 · N7178Y · Destroyed > the pilot's failure to maintain aircraft control during takeoff initial climb. Factors were the loss of right engine power for undetermined reasons, and the pilot's lack of total experience in the make and model of aircraft. - [NTSB FTW99LA154](https://openairdocs.org/ntsb/FTW99LA154.md): Piper PA-30B · Mcalester, OK · Accident · No injuries · Limited investigation · Final report · May 28, 1999 · N7991Y · Substantial damage > The pilot inadvertently stalling the airplane while attempting to avoid power lines. Factors were the loss of power on both the left and right engines as a result of water contamination in the fuel system, the pilot's inadequate preflight procedures, and the… - [NTSB FTW89LA109](https://openairdocs.org/ntsb/FTW89LA109.md): Piper PA-30 · Bristow, OK · Accident · Minor injuries · Limited investigation · Final report · Jun 6, 1989 · N7959Y · Substantial damage > The pilot's improper fuel management and failure of the inflight restart attempt. - [NTSB FTW85LA292](https://openairdocs.org/ntsb/FTW85LA292.md): Champion 7KCAB · Chattanooga, OK · Accident · No injuries · Limited investigation · Final report · Jul 20, 1985 · N1642G · Substantial damage > The plt lost directional control while landing in a crosswind and the acft ground looped after the left main landing gear contacted soft terrain alongside of the runway. The nearest official aviation weather reporting station was at lawton, OK, located 16… - [NTSB FTW85LA217](https://openairdocs.org/ntsb/FTW85LA217.md): Champion 7KCAB · Chattanooga, OK · Accident · 1 fatal · Limited investigation · Final report · May 11, 1985 · N5285X · Substantial damage > The pilot was tow launching a glider. When about 200 feet above ground level and for unknown reasons the glider suddenly gained unwanted altitude and climbed above the tow plane. This pitched the nose of the tow plane downward before the tow line could be… - [NTSB FTW84FA171](https://openairdocs.org/ntsb/FTW84FA171.md): Bellanca 8KCAB · Kiefer, OK · Accident · 2 fatal · Field investigation · Final report · Mar 17, 1984 · N5502V · Destroyed > The acft was destroyed as it spun into the ground after having been observed doing aerobatics between 800 and 1500 AGL. The maneuvers included barrel rolls and hammerhead stalls. The last maneuver ended in a spin that was said to last ABOUT5 turns before… - [NTSB FTW74DPM26](https://openairdocs.org/ntsb/FTW74DPM26.md): Bellanca 7KCAB · Okemah, OK · Accident · No injuries · Closed · May 12, 1974 · N5099X · Substantial damage - [NTSB FTW74FPM06](https://openairdocs.org/ntsb/FTW74FPM06.md): Piper PA-30 · Tulsa, OK · Accident · No injuries · Closed · Aug 31, 1973 · N8328Y · Substantial damage - [NTSB FTW72FPJ19](https://openairdocs.org/ntsb/FTW72FPJ19.md): Champion 7KCAB · Oklahoma Cty, OK · Accident · No injuries · Closed · Oct 11, 1971 · N5099X · Substantial damage - [NTSB FTW71FPJ43](https://openairdocs.org/ntsb/FTW71FPJ43.md): Piper PA-30 · Oklahoma Cty, OK · Accident · No injuries · Closed · May 24, 1971 · N8396Y · Substantial damage - [NTSB FTW68A0072](https://openairdocs.org/ntsb/FTW68A0072.md): Piper PA-30 · Enid, OK · Accident · No injuries · Closed · Jan 17, 1968 · N7407Y · Substantial damage - [NTSB FTW68D0340](https://openairdocs.org/ntsb/FTW68D0340.md): Piper PA-30 · Okla.City, OK · Accident · No injuries · Closed · Nov 27, 1967 · N7519Y · Substantial damage - [NTSB FTW66D0416](https://openairdocs.org/ntsb/FTW66D0416.md): Piper PA-30 · Tulsa, OK · Accident · No injuries · Closed · Oct 10, 1965 · N7746Y · Substantial damage - [NTSB FTW65F0026](https://openairdocs.org/ntsb/FTW65F0026.md): Piper PA-30 · Oklahoma City, OK · Accident · No injuries · Closed · Apr 18, 1965 · N7670Y · 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 ('41509')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41509&state=OK --- 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.