# Major NTSB investigations: AiResearch TPE331 series

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 WPR25MA128](https://openairdocs.org/ntsb/WPR25MA128.md): Mitsubishi MU-2B-40 · Copake, NY · Accident · 6 fatal · Class 3 · Major · Preliminary report · Apr 12, 2025 · N635TA · Destroyed
  > On April 12, 2025, about 1203 eastern daylight time, a Mitsubishi MU-2B-40, N635TA, was destroyed when it was involved in an accident near Copake, New York. The pilot and five passengers were fatally injured. The airplane was operated as a Title 14 Code of…
- [NTSB DEN06MA119](https://openairdocs.org/ntsb/DEN06MA119.md): Mitsubishi MU-2B-35 · Argyle, FL · Accident · 1 fatal · Major investigation · Final report · Sep 1, 2006 · N6569L · Destroyed
  > the pilot's inadvertent flight into thunderstorm activity that resulted in the loss of control, design limits of the airplane being exceeded and subsequent in-flight breakup. A contributing factor was the failure of air traffic control to use available radar…
- [NTSB NYC06MA208](https://openairdocs.org/ntsb/NYC06MA208.md): Mitsubishi MU-2B-40 · Bunnell, FL · Accident · 2 fatal · Major investigation · Final report · Aug 25, 2006 · N171MA · Destroyed
  > The pilot's inadvertent encounter with thunderstorms.
- [NTSB IAD05FA023](https://openairdocs.org/ntsb/IAD05FA023.md): CASA 212-200-CC · Bamiyan, Afghanistan · Accident · 6 fatal · Class 1 · Field · Final report · Nov 27, 2004 · N960BW · Destroyed
  > the captain's inappropriate decision to fly a nonstandard route and his failure to maintain adequate terrain clearance, which resulted in the inflight collision with mountainous terrain. Factors were the operator's failure to require its flight crews to file…
- [NTSB DCA05MA004](https://openairdocs.org/ntsb/DCA05MA004.md): British Aerospace Jetstream 32 · Kirksville, MO · Accident · 13 fatal · Class 1 · Major · Final report · Oct 20, 2004 · N875JX · Destroyed
  > the pilots' failure to follow established procedures and properly conduct a nonprecision instrument approach at night in IMC, including their descent below the minimum descent altitude (MDA) before required visual cues were available (which continued…
- [NTSB CHI91MA260](https://openairdocs.org/ntsb/CHI91MA260.md): British Aerospace 3201 · St Louis, MO · Accident · No injuries · Major investigation · Final report · Aug 12, 1991 · N339TE · Substantial damage
  > Failure of the pilot(s) to follow the correct emergency procedure. Factors related to this accident were: inadequate system design by the manufacturer, which allowed hydraulic line vibration, fatigue failure of the line, and loss of fluid from the normal…
- [NTSB DCA87MA030](https://openairdocs.org/ntsb/DCA87MA030.md): CASA C-212-CC · Mayaguez, PR · Accident · 2 fatal · Major investigation · Final report · May 8, 1987 · N432CA · Destroyed
  > After several maintenance adjustments of the right propeller and flight idle fuel flow, the aircraft was test flown and released for flight. Several pilots continued to note descrepancies concerning the right propeller system. Adjustments were made and the…
- [NTSB CHI86MA025](https://openairdocs.org/ntsb/CHI86MA025.md): Cessna 441 · Derry, PA · Accident · 5 fatal · Major investigation · Final report · Nov 11, 1985 · N59MD · Destroyed
  > Drg arrival, the plt was advised the destn wx was: estd 500' overcast, vis 1 mi with fog, arpt blo mins. The plt electedto make an NDB rwy 23 apch, but said he would divert if a missed apch was made. He was provided radar vectors & was clrdfor the apch. At…
- [NTSB DEN84MA266](https://openairdocs.org/ntsb/DEN84MA266.md): Aero Commander 690 · Little America, WY · Accident · 4 fatal · Major investigation · Final report · Aug 25, 1984 · N9150N · Destroyed
  > About 10 min after takeoff at 1005 MDT, the plt was cleared to climb to FL 190. This was atc's last communication with the acft. At 1030:39, the controller attempted to contact the plt to advise that he had lost radar contact & to recycle the transponder &…

## 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.board_report_url IS NOT NULL OR c."investigationClass" = 'Class 1' OR c."caseType" = 'Major - Launch')
  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&major=1

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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.