# NTSB investigations: Pratt & Whitney R-985 series, 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 WPR25LA165](https://openairdocs.org/ntsb/WPR25LA165.md): Weatherly 620B · Lewiston, MT · Accident · No injuries · Class 4 · Limited · Final report · May 30, 2025 · N90393 · Substantial damage
  > The pilot’s failure to maintain clearance from terrain while maneuvering at a low altitude.
- [NTSB WPR23LA284](https://openairdocs.org/ntsb/WPR23LA284.md): Boeing A75N1 · Red Lodge, MT · Accident · No injuries · Class 4 · Limited · Final report · Jul 22, 2023 · N53132 · Substantial damage
  > The pilot’s loss of directional control during landing with wind gusts, which resulted in a ground loop and collision with a fence.
- [NTSB GAA18CA372](https://openairdocs.org/ntsb/GAA18CA372.md): Beech D17 · Hamilton, MT · Accident · Minor injuries · Data collection · Final report · Jun 22, 2018 · N61862 · Substantial damage
  > The pilot’s failure to maintain directional control during the landing roll and his subsequent inability to recover due to his foot being stuck.
- [NTSB GAA17CA225](https://openairdocs.org/ntsb/GAA17CA225.md): Weatherly 620B · Lewistown, MT · Accident · No injuries · Data collection · Final report · Apr 10, 2017 · N9004M · Substantial damage
  > The pilot’s failure to maintain altitude during low-altitude maneuvers in flat light conditions.
- [NTSB SEA95LA119](https://openairdocs.org/ntsb/SEA95LA119.md): Grumman G-164B · Helena, MT · Accident · No injuries · Limited investigation · Final report · Jun 15, 1995 · N6669Q · Destroyed
  > The loss of engine power for undetermined reasons.
- [NTSB SEA95FA043](https://openairdocs.org/ntsb/SEA95FA043.md): Beech E18S · Butte, MT · Accident · 1 fatal · Field investigation · Final report · Jan 27, 1995 · N250RP · Substantial damage
  > The pilot's failure to follow the IFR procedure by not maintaining the proper altitude prior to the initial appraoch fix. Factors to the accident were dark night conditions and a low ceiling.
- [NTSB SEA93LA112](https://openairdocs.org/ntsb/SEA93LA112.md): Boeing A75N1 · Hardin, MT · Accident · No injuries · Limited investigation · Final report · May 19, 1993 · N9041R · Substantial damage
  > The pilot in command's failure to maintain directional control.
- [NTSB DEN87MA168](https://openairdocs.org/ntsb/DEN87MA168.md): Beech D18S · Lakeside, MT · Accident · 10 fatal · Major investigation · Final report · Jul 5, 1987 · N132E · Destroyed
  > The plt borrowed the acft to fly a musical group to kalispell for a pvt engagement at Lakeside, MT, which was aprx 15 mi south of the arpt. That evening, the group boarded the acft for the return flt. After takeoff, the acft was seen flying at low alt in the…
- [NTSB DEN85LA221](https://openairdocs.org/ntsb/DEN85LA221.md): Beech E18S · Billings, MT · Accident · No injuries · Limited investigation · Final report · Aug 16, 1985 · N44N · Substantial damage
  > The plt stated that he encountered a 'wind draft' and the acft was struck by lightning. The rt eng mount failed and the rt eng was deflected downward. Plt was unable to maintain alt and executed a forced landing in an open field. Post crash exam of the welded…
- [NTSB DEN84LA094](https://openairdocs.org/ntsb/DEN84LA094.md): Weatherly 201B · Townsend, MT · Accident · No injuries · Limited investigation · Final report · Feb 18, 1984 · N1264W · Substantial damage
  > The acft engine lost power on the base leg when the plt retarded the throttle. The plt landed on the rwy, but the acft started to veer to the right. The plt said he applied the brakes which did not seem to operate. Later, he said he may have had his feet on…
- [NTSB DEN80DTI12](https://openairdocs.org/ntsb/DEN80DTI12.md): Callair B-1A · Valier, MT · Accident · No injuries · Closed · Jul 18, 1980 · N7278V · Substantial damage
- [NTSB SEA79FTA13](https://openairdocs.org/ntsb/SEA79FTA13.md): Grumman G-164B · Billings, MT · Accident · No injuries · Closed · May 3, 1979 · N6753Q · Substantial damage
- [NTSB SEA77FTA15](https://openairdocs.org/ntsb/SEA77FTA15.md): Beech C-45H · Plentywood, MT · Accident · No injuries · Closed · Apr 3, 1977 · N5043K · Substantial damage
- [NTSB SEA76DTI23](https://openairdocs.org/ntsb/SEA76DTI23.md): Grumman G-164A · Chester, MT · Accident · No injuries · Closed · Apr 9, 1976 · N5338 · Substantial damage
- [NTSB SEA76DTI07](https://openairdocs.org/ntsb/SEA76DTI07.md): Boeing A75N1 · Chester, MT · Accident · No injuries · Closed · Aug 5, 1975 · N5600 · Substantial damage
- [NTSB SEA75FTA05](https://openairdocs.org/ntsb/SEA75FTA05.md): Grumman G-164 · Baker, MT · Accident · No injuries · Closed · Jul 25, 1974 · N664U · Substantial damage
- [NTSB SEA69F0035](https://openairdocs.org/ntsb/SEA69F0035.md): Boeing A75 · Boyd, MT · Accident · 1 fatal · Closed · Jul 8, 1968 · N61926 · Destroyed
- [NTSB SEA69D0034](https://openairdocs.org/ntsb/SEA69D0034.md): Boeing A75N1 · Wilsall, MT · Accident · No injuries · Closed · Jul 1, 1968 · N5150N · Substantial damage
- [NTSB UNK64X2500](https://openairdocs.org/ntsb/UNK64X2500.md): Beechcraft D18S · Hardin, MT · Accident · No injuries · Closed · Jun 26, 1964 · N9886H · Substantial damage

## 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 ('52008'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52008&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.