# NTSB investigations, OK: Part(s) separation from AC 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 CEN26LA175](https://openairdocs.org/ntsb/CEN26LA175.md): Hiller UH-12E · Chickasha, OK · Accident · No injuries · Class 3 · Limited · Preliminary report · Apr 30, 2026 · N22SP · Substantial damage > On April 30, 2026, about 1730 central daylight time, a Hiller UH-12E, N22SP, was substantially damaged when it was involved in an accident near Chickasha, Oklahoma. The pilot was not injured. The helicopter was operated as a Title 14 Code of Federal… - [NTSB CEN21FA314](https://openairdocs.org/ntsb/CEN21FA314.md): PZL Mielec M18 · Seiling, OK · Accident · 1 fatal · Class 3 · Field · Final report · Jul 12, 2021 · N9310R · Destroyed > The pilot’s in-flight loss of control due to the structural failure of a wing fitting and separation of the outboard wing section. Also causal were the inadequate wing fitting inspections, which failed to detect the initial corrosion and crack before it… - [NTSB CEN18FA023](https://openairdocs.org/ntsb/CEN18FA023.md): Beech V35B · Alva, OK · Accident · 2 fatal · Field investigation · Final report · Nov 4, 2017 · N777PH · Destroyed > The flight instructor's and pilot's failure to recognize that a high descent rate had developed on short final, likely due to their distraction by an open engine cowling, and the unexpected strong pitch-down force during flap extension due to the installation… - [NTSB CEN17LA235](https://openairdocs.org/ntsb/CEN17LA235.md): Cessna 182A · Buffalo, OK · Accident · No injuries · Limited investigation · Final report · Jun 17, 2017 · N6196B · Substantial damage > The separation of the nose wheel axle bolt and the nose wheel during the landing roll for reasons that could not be determined because the bolt was not recovered. - [NTSB GAA16CA395](https://openairdocs.org/ntsb/GAA16CA395.md): Engineering & Research 415 · Collinsville, OK · Accident · No injuries · Data collection · Final report · Jul 23, 2016 · N2377H · Substantial damage > The pilot's failure to maintain directional control during takeoff in a high density altitude condition, which resulted in a runway excursion and impact with a tree. - [NTSB CEN16LA184](https://openairdocs.org/ntsb/CEN16LA184.md): Cessna 150F · Ponca City, OK · Accident · Serious injuries · Limited investigation · Final report · May 1, 2016 · N8619G · Substantial damage > Maintenance personnel's improper installation of the elevator bolt, which resulted in a loss of elevator control during landing. - [NTSB CEN15LA379](https://openairdocs.org/ntsb/CEN15LA379.md): Robinson Helicopter R44 II · Ketchum, OK · Accident · Minor injuries · Limited investigation · Final report · Aug 25, 2015 · N444KD · Substantial damage > The separation of the tail rotor gearbox from the tailboom aft bulkhead due to overstress loads imposed by a blade imbalance from an in-flight impact with an undetermined object. - [NTSB CEN15FA171](https://openairdocs.org/ntsb/CEN15FA171.md): Eurocopter AS 350 B2 · Eufaula, OK · Accident · 1 fatal · Field investigation · Final report · Mar 13, 2015 · N919EM · Destroyed > The flight's inadvertent encounter with night instrument meteorological conditions, which resulted in the pilot turning the helicopter and subsequently descending into trees and terrain due to spatial disorientation. - [NTSB CEN14LA129](https://openairdocs.org/ntsb/CEN14LA129.md): Cessna 525 · Elk City, OK · Accident · No injuries · Limited investigation · Final report · Feb 4, 2014 · N61YP · Substantial damage > The pilot’s descent below the published minimum descent altitude for the instrument approach procedure, which resulted in impact with a utility pole. - [NTSB CEN13FA344](https://openairdocs.org/ntsb/CEN13FA344.md): Eurocopter AS350B2 · Talihina, OK · Accident · 1 fatal · Field investigation · Final report · Jun 11, 2013 · N935EM · Substantial damage > The helicopter pilot's failure to see and avoid the 40-ft-tall lamp post during takeoff. Contributing to the accident was the pilot's inadequate preflight evaluation of the obstructions in the takeoff path. - [NTSB CEN12LA368](https://openairdocs.org/ntsb/CEN12LA368.md): Mooney M20F · Hooker, OK · Accident · Serious injuries · Limited investigation · Final report · Jun 12, 2012 · N6455Q · Substantial damage > The pilot’s loss of airplane control after a partial loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures, which resulted in an… - [NTSB CEN10LA241](https://openairdocs.org/ntsb/CEN10LA241.md): Hager Clinton Ray Vans RV-8 · Prague, OK · Accident · Minor injuries · Limited investigation · Final report · May 6, 2010 · N127TT · Substantial damage > The in-flight separation of a propeller blade for undetermined reasons. - [NTSB CEN09LA197](https://openairdocs.org/ntsb/CEN09LA197.md): Neland Richard L Daytona SU · Guymon, OK · Accident · No injuries · Limited investigation · Final report · Feb 26, 2009 · N170DN · Substantial damage > Failure of the left main landing gear shock/strut during takeoff for undetermined reasons. ## 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '338' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-events/338/sequence?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.