# NTSB investigations: Franklin 6A4165 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 ANC92LA020](https://openairdocs.org/ntsb/ANC92LA020.md): Stinson 108 · Chugiak, AK · Accident · No injuries · Limited investigation · Final report · Dec 15, 1991 · N767C · Substantial damage
  > The pilot failed to maintain proper altitude during the final approach. Contributing to the accident was the pilot's lack of total experience performing landings in reduced light conditions, the poor light condition at dusk, and the snow covered terrain.
- [NTSB ANC91LA157](https://openairdocs.org/ntsb/ANC91LA157.md): Stinson 108-3 · Cantwell, AK · Accident · No injuries · Limited investigation · Final report · Sep 18, 1991 · N6436M · Substantial damage
  > The engine power loss for undetermined reasons and the lack of suitable terrain for a forced landing.
- [NTSB DEN91LA080](https://openairdocs.org/ntsb/DEN91LA080.md): Stinson 108-2 · Santa Fe, NM · Accident · No injuries · Limited investigation · Final report · Jun 7, 1991 · N9759K · Substantial damage
  > A forward aft pilot seat adjustment locking mechanism failure.

## 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 ('27025'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27025&year=1991

---
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.