# NTSB investigations: Pratt & Whitney PT6A-20A series

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 CEN10CA262](https://openairdocs.org/ntsb/CEN10CA262.md): Air Tractor AT-301 · D'Hanis, TX · Accident · No injuries · Data collection · Final report · May 20, 2010 · N3159D · Substantial damage
  > The pilot's failure to properly set the airplane's flaps prior to takeoff.
- [NTSB CHI04CA162](https://openairdocs.org/ntsb/CHI04CA162.md): Air Tractor AT-401 · Britton, SD · Accident · No injuries · Data collection · Final report · Jun 23, 2004 · N1013N · Substantial damage
  > The loss of engine power due to a stuck exhaust valve and the unsuitable terrain encountered during the forced landing. A factor to the accident was the soft terrain condition.
- [NTSB MIA89LA127](https://openairdocs.org/ntsb/MIA89LA127.md): Air Tractor AT-301 · Fort Pierce, FL · Accident · No injuries · Limited investigation · Final report · Apr 13, 1989 · N3159D · Substantial damage
  > Failure of the number five cylinder. Factors related to the accident were: the proximity of homes in the area, which precluded jettisoning of the chemical load, and high vegetation in the emergency landing area.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52139'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52139

---
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.