# NTSB investigations: Pratt & Whitney PT6A series, MN

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 CEN22LA342](https://openairdocs.org/ntsb/CEN22LA342.md): Air Tractor AT-502 · East Grand Forks, MN · Accident · No injuries · Class 4 · Limited · Final report · Jul 21, 2022 · N1540S · Substantial damage
  > The pilot’s failure to maintain clearance from the power lines during a low-level application pass.
- [NTSB CEN21LA004](https://openairdocs.org/ntsb/CEN21LA004.md): Piper PA46 · Lake Elmo, MN · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 2, 2020 · N62ZM · Substantial damage
  > A total loss of engine power for reasons that could not be determined.
- [NTSB CEN16LA326](https://openairdocs.org/ntsb/CEN16LA326.md): Thrush S2R T660 · Ruthton, MN · Accident · 1 fatal · Limited investigation · Final report · Aug 19, 2016 · N40499 · Destroyed
  > The pilot's failure to see and avoid the tower guy-wire during an agricultural spraying operation.
- [NTSB CHI08CA257](https://openairdocs.org/ntsb/CHI08CA257.md): Air Tractor AT-400A · Luverne, MN · Accident · No injuries · Data collection · Final report · Aug 16, 2008 · N7307W · Substantial damage
  > The failure of the compressor turbine blades which resulted in the loss of power. Factors associated with the accident were the low altitude and the trees.
- [NTSB CHI06CA221](https://openairdocs.org/ntsb/CHI06CA221.md): Air Tractor AT-400 · Springfield, MN · Accident · No injuries · Data collection · Final report · Jul 31, 2006 · N23720 · Substantial damage
  > The pilot's inability to maintain directional control of the airplane as a result of the partial failure of the tail wheel assembly. A factor associated with the accident was the crop that the airplane contacted.
- [NTSB CHI05CA245](https://openairdocs.org/ntsb/CHI05CA245.md): Air Tractor AT-502 · Hector, MN · Accident · No injuries · Data collection · Final report · Aug 29, 2005 · N4550N · Substantial damage
  > The pilot's failure to achieve adequate airspeed on takeoff which resulted in the airplane entering a stall/mush when it flew out of ground effect while crossing a large drainage ditch on takeoff.
- [NTSB CHI01LA326](https://openairdocs.org/ntsb/CHI01LA326.md): Cessna 208 · Aurora, MN · Accident · No injuries · Limited investigation · Final report · Sep 27, 2001 · N12712 · Substantial damage
  > The pilot not maintaining the proper descent rate during the landing. Factors were the flap's popped circuit breaker, the pilot not verifying the flap's position, the glassy water, and the dock.
- [NTSB CHI91DER07](https://openairdocs.org/ntsb/CHI91DER07.md): Piper PA-36-375 · Breckentidge, MN · Accident · No injuries · Final report · Jun 14, 1991 · N3866E · Substantial damage
  > The pilot's failure to take adequate remedial action during the attempted climb out. A related factor is the premature lift off.

## 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" = 'MN' 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 ('52032', '52034'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52032&state=MN

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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.