# NTSB investigations: Pratt & Whitney PT6A series, 1991

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 ANC91FA142](https://openairdocs.org/ntsb/ANC91FA142.md): Cessna 208 · Dillingham, AK · Accident · No injuries · Field investigation · Final report · Sep 3, 1991 · N9438F · Substantial damage
  > The pilot's inattentive preflight inspection which resulted in his failure to properly secure the engine oil tube filler cap resulting in the loss of engine oil and oil pressure and the pilot's failure to properly compensate for wind conditions during the…
- [NTSB FTW91DRG04](https://openairdocs.org/ntsb/FTW91DRG04.md): Air Tractor AT-402 · Taft, TX · Accident · Serious injuries · Final report · Jul 21, 1991 · N4523L · Minor damage
  > The pilot's failure to maintain proper terrain clearance.
- [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.
- [NTSB MIA91IA117](https://openairdocs.org/ntsb/MIA91IA117.md): Embraer EMB-110P1 · Ochopee, FL · Incident · No injuries · Incident investigation · Final report · Apr 5, 1991 · N102TN · Minor damage
  > Failure of the student to use the checklist, inadequate supervision by the pic/cfi, and inadequate supervision by the FAA principle operations inspector.
- [NTSB CHI91LA103](https://openairdocs.org/ntsb/CHI91LA103.md): Short Brothers SD3-60 · Chicago, IL · Accident · No injuries · Limited investigation · Final report · Mar 2, 1991 · N385MQ · Substantial damage
  > An excessive landing flare by the copilot. Factors associated with the accident are the inoperative wing flaps and the captain's inadequate supervison.

## 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 year(c."eventDate") = 1991
  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&year=1991

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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.