# NTSB investigations: AiResearch TPE331 series, MI

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 WPR26LA308](https://openairdocs.org/ntsb/WPR26LA308.md): Mitsubishi MU-2B-40 · Norton Shores, MI · Accident · No injuries · Class 4 · Limited · Final report · Aug 15, 2026 · N5LC · Substantial damage
  > The pilot’s failure to extend the landing gear before landing.
- [NTSB CEN24LA318](https://openairdocs.org/ntsb/CEN24LA318.md): Ayres S2R · Stanwood, MI · Accident · No injuries · Class 3 · Limited · Final report · Jun 20, 2024 · N4004K · Substantial damage
  > The pilot’s failure to maintain terrain clearance during a low-level aerial application flight, which resulted in impact with terrain and a subsequent forced landing. Contributing to the accident was the location of the spray boom pressure gauge, which…
- [NTSB CEN22FA032](https://openairdocs.org/ntsb/CEN22FA032.md): Beech E-90 · Boyne City, MI · Accident · 2 fatal · Class 3 · Field · Final report · Nov 15, 2021 · N290KA · Destroyed
  > The pilot’s failure to maintain sufficient airspeed and his exceedance of the airplane’s critical angle of attack while in icing conditions, which resulted in an aerodynamic stall and subsequent ground impact.
- [NTSB CEN19LA231](https://openairdocs.org/ntsb/CEN19LA231.md): Ayres S2R · Breckenridge, MI · Accident · No injuries · Class 3 · Limited · Final report · Jul 21, 2019 · N766BF · Substantial damage
  > A total loss of engine power due to a lack of oil in the engine. The source of the inflight oil leak could not be determined based on the available information.
- [NTSB CEN12CA215](https://openairdocs.org/ntsb/CEN12CA215.md): Cessna 441 · Battle Creek, MI · Accident · No injuries · Data collection · Final report · Mar 27, 2012 · N1212C · Substantial damage
  > The maintenance technician did not remove the tow bar prior to the flight.
- [NTSB CHI03LA278](https://openairdocs.org/ntsb/CHI03LA278.md): Ayres S2R-G6 · Breckenridge, MI · Accident · 1 fatal · Limited investigation · Final report · Aug 19, 2003 · N23EG · Destroyed
  > The pilot's failure to maintain clearance from the powerlines during the aerial application pass rendering the airplane uncontrollable. The powerlines were a factor.
- [NTSB CHI96LA053](https://openairdocs.org/ntsb/CHI96LA053.md): Swearingen SA-226AT · Detroit, MI · Accident · No injuries · Limited investigation · Final report · Dec 15, 1995 · N31AT · Substantial damage
  > the pilot's failure to extend the landing gear. A factor in the accident was the pilot's diverted attention.
- [NTSB CHI93FA378](https://openairdocs.org/ntsb/CHI93FA378.md): Aero Commander 690A · Lansing, MI · Accident · 2 fatal · Field investigation · Final report · Sep 27, 1993 · N242TC · Destroyed
  > was the pilot-in-command not maintaining aircraft control during the intermittent operation of the electrically operated attitude gyro. Factor's associated with this accident are an fluctuating (intermittent) electrical system inverter and the…
- [NTSB CHI86FA172](https://openairdocs.org/ntsb/CHI86FA172.md): Cessna 441 · Norton Shores, MI · Accident · 3 fatal · Field investigation · Final report · Jul 16, 1986 · N6857E · Destroyed
  > N6857E was transporting executives from holland, MI, to muskegon. The pilot was executing an asr approach to runway 06. The mda is 537 ft AGL. Co-pilot called out 1200 feet then below 1000 feet, pilot continued approach. Aircraft struck trees two miles from…

## 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" = 'MI' 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=MI

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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.