# NTSB investigations: AiResearch TPE331 series, CO 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 DCA26LA151](https://openairdocs.org/ntsb/DCA26LA151.md): Fairchild SA227-AC · Denver, CO · Accident · No injuries · Class 4 · Limited · Final report · Mar 7, 2026 · N425MA · Substantial damage > The overstress failure of the left main landing gear lower drag brace links during takeoff which resulted in a runway excursion during landing due to the left main landing gear collapsing. - [NTSB CEN22LA195](https://openairdocs.org/ntsb/CEN22LA195.md): Swearingen SA226-T(B) · Denver, CO · Accident · No injuries · Class 3 · Limited · Final report · May 6, 2022 · N36LC · Substantial damage > The captain’s failure to ensure that the parking brake was correctly released before takeoff, which resulted in seized brakes during landing and a subsequent loss of directional control and runway excursion. - [NTSB CEN21FA215](https://openairdocs.org/ntsb/CEN21FA215.md): Swearingen SA226TC · Englewood, CO · Accident · No injuries · Class 3 · Field · Final report · May 12, 2021 · N280KL · 2 aircraft · Substantial damage > The Cirrus pilot’s failure to maintain the final approach course for the assigned runway, which resulted in a collision with the Swearingen which was on final approach to the parallel runway. Contributing to the accident was the failure of the controller to… - [NTSB CEN15LA202](https://openairdocs.org/ntsb/CEN15LA202.md): Fairchild SA227 AC · Rifle, CO · Accident · No injuries · Limited investigation · Final report · Apr 17, 2015 · N2691W · Substantial damage > The uncontained engine failure due to the fatigue failure of the second-stage turbine rotor disk. - [NTSB DEN06IA056](https://openairdocs.org/ntsb/DEN06IA056.md): Swearingen SA226TC · Denver, CO · Incident · No injuries · Incident investigation · Final report · Apr 5, 2006 · N770S · No damage > the failure of the elevator down cable due to an improperly routed cable by unknown maintenance personnel. A contributing factor was the improper inspection of the elevator cable by the operator's maintenance personnel. - [NTSB DFW05FA202](https://openairdocs.org/ntsb/DFW05FA202.md): Mitsubishi MU-2B-60 · Parker, CO · Accident · 1 fatal · Field investigation · Final report · Aug 4, 2005 · N454MA · Destroyed > The pilot’s failure to fly a stabilized instrument approach at night which resulted in controlled flight into terrain. Contributing factors were; the dark night, low clouds, the inadequate design and function of the airport facility’s Minimum Safe Altitude… - [NTSB DEN05FA034](https://openairdocs.org/ntsb/DEN05FA034.md): Mitsubishi MU-2B-60 · Englewood, CO · Accident · 2 fatal · Field investigation · Final report · Dec 11, 2004 · N538EA · Destroyed > the pilot's failure to maintain minimum controllable airspeed during the night visual approach resulting in a loss of control and uncontrolled descent into terrain. A contributing factor was the precautionary shutdown of the left engine for undetermined… - [NTSB DEN04LA112](https://openairdocs.org/ntsb/DEN04LA112.md): Swearingen SA-226T · Rifle, CO · Accident · No injuries · Limited investigation · Final report · Jul 21, 2004 · N84GA · Substantial damage > the pilot's failure to maintain aircraft control during the aborted takeoff resulting in the airplane departing the runway and striking a runway light and two taxiway signs. Factors contributing to the accident were the broken sensor wire to the left engine's… - [NTSB DEN04FA035](https://openairdocs.org/ntsb/DEN04FA035.md): Rockwell 690A · Cortez, CO · Accident · 1 fatal · Field investigation · Final report · Jan 3, 2004 · N700SR · Destroyed > the pilot's inadequate planned approach and his failure to maintain airspeed which resulted in a stall. Contributing factors were low altitude flight maneuvering in an attempt to lose excessive altitude and realign the airplane for landing, and his failure to… - [NTSB DEN04FA027](https://openairdocs.org/ntsb/DEN04FA027.md): Swearingen SA226-TC · Denver, CO · Accident · No injuries · Field investigation · Final report · Dec 3, 2003 · N60U · 2 aircraft · Substantial damage > the failure of the pilot of the taxiing aircraft to maintain clearance and adequate visual lookout for the stopped aircraft. - [NTSB DEN04LA023](https://openairdocs.org/ntsb/DEN04LA023.md): Fairchild Swearingen SA226TC · Grand Junction, CO · Accident · No injuries · Limited investigation · Final report · Nov 18, 2003 · N332BA · Substantial damage > the operator's improper maintenance and servicing of the airplane's nose landing gear assembly, resulting in the collapse of the nose landing gear during the landing roll. Contributing factors include the nose section of the airplane's subsequent contact with… - [NTSB DEN03LA076](https://openairdocs.org/ntsb/DEN03LA076.md): Swearingen SA226TC · Denver, CO · Accident · No injuries · Limited investigation · Final report · Apr 16, 2003 · N229AM · Substantial damage > The failure of the landing gear system and the flight crew's failure to ascertain that the landing gear was down and locked. A contributing factor was the inadequate maintenance inspections performed by maintenance personnel. - [NTSB DEN01LA052](https://openairdocs.org/ntsb/DEN01LA052.md): Cessna 441 · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Feb 13, 2001 · N24PT · Substantial damage > the pilot's failure to verify that the landing gear was down and locked before landing, which resulted in a wheels-up landing. - [NTSB DEN99LA047](https://openairdocs.org/ntsb/DEN99LA047.md): Swearingen SA226TC · Denver, CO · Accident · No injuries · Limited investigation · Final report · Mar 5, 1999 · N151SA · 2 aircraft · Substantial damage > The pilot of N328BA's failure to maintain visual lookout while taxiing, causing the subsequent collision with N151SA. - [NTSB DEN90LA047](https://openairdocs.org/ntsb/DEN90LA047.md): Mitsubishi MU-2B-25 · Broomfield, CO · Accident · No injuries · Limited investigation · Final report · Jan 19, 1990 · N99SR · Substantial damage > Loss of directional control by the pilot, during takeoff ground run. Contributing to this accident were a loss of power on the left engine due to snow ingestion, heavy snow showers in progress and an icy, snow covered runway. ## 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" = 'CO' 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 ('01514', '01517')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=01514&state=CO --- 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.