# NTSB investigations: Pratt & Whitney Canada PT6A-60A, MT

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 WPR11LA288](https://openairdocs.org/ntsb/WPR11LA288.md): Air Tractor AT-502 · Lewistown, MT · Accident · No injuries · Limited investigation · Final report · Jun 25, 2011 · N1022N · Substantial damage
  > The fatigue fracture and separation of the fuel bypass line, which resulted in a total loss of engine power.
- [NTSB SEA06FA022](https://openairdocs.org/ntsb/SEA06FA022.md): Cessna 425 · Belgrade, MT · Accident · 1 fatal · Field investigation · Final report · Nov 30, 2005 · N701QR · Destroyed
  > The pilot's failure to maintain airspeed during the approach which resulted in an inadvertent stall. Factors associated with the accident were dark night conditions, clouds, icing conditions, low visibility and snow.
- [NTSB SEA04FA166](https://openairdocs.org/ntsb/SEA04FA166.md): Beech BE-99 · Neihart, MT · Accident · 2 fatal · Field investigation · Final report · Aug 18, 2004 · N199GL · Destroyed
  > The pilot's failure to maintain adequate terrain clearance during cruise, which resulted in the in-flight collision with mountainous terrain. Dark night conditions and mountainous terrain were contributing factors.
- [NTSB SEA99LA003](https://openairdocs.org/ntsb/SEA99LA003.md): Beech 99 · Missoula, MT · Accident · Minor injuries · Limited investigation · Final report · Oct 17, 1998 · N299GL · Substantial damage
  > The pilot-in-command's delayed remedial action in response to the co-pilot's improper landing flare, and the co-pilot's application of excessive (full nose-up) trim during the landing flare as taught in the operator's initial aircrew training program. Factors…
- [NTSB SEA94LA218](https://openairdocs.org/ntsb/SEA94LA218.md): Beech 99 · Helena, MT · Accident · No injuries · Limited investigation · Final report · Aug 20, 1994 · N14MV · Substantial damage
  > Landing gear locking mechanism overload and improper rigging.

## 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" = 'MT' 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 ('52043', '51999'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52043&state=MT

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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.