# NTSB investigations: Jacobs L4 /R755-7, 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 WPR13CA409](https://openairdocs.org/ntsb/WPR13CA409.md): Cessna 195A · Meadow Creek, MT · Accident · No injuries · Data collection · Final report · Sep 14, 2013 · N4324N · Substantial damage
  > The pilot's failure to maintain directional control during the takeoff roll on a rough turf runway.
- [NTSB SEA98LA193](https://openairdocs.org/ntsb/SEA98LA193.md): Cessna T-50 · Missoula, MT · Accident · No injuries · Limited investigation · Final report · Sep 27, 1998 · N6HS · Substantial damage
  > A quick drain was open due to the pilot's inadequate preflight.
- [NTSB SEA79FTA06](https://openairdocs.org/ntsb/SEA79FTA06.md): Cessna 195 · Baker, MT · Accident · No injuries · Closed · Dec 11, 1978 · N4324N · Substantial damage
- [NTSB SEA76DTI19](https://openairdocs.org/ntsb/SEA76DTI19.md): Stearman PT-17 · Marias Pass, MT · Accident · No injuries · Closed · Jan 23, 1976 · N60131 · Substantial damage
- [NTSB SEA74DTI06](https://openairdocs.org/ntsb/SEA74DTI06-201625.md): Cessna 195A · Heart Butte, MT · Accident · No injuries · Closed · Jul 19, 1973 · N1528D · 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 ('35003'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=35003&state=MT

---
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.