# NTSB investigations: Allison 250-C20 series, 1981

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 FTW82DA028](https://openairdocs.org/ntsb/FTW82DA028.md): Bell 206B · Gulf Of Mexico (Atlantic Ocean) · Accident · No injuries · Closed · Dec 3, 1981 · N5006Y · Substantial damage
- [NTSB LAX82DXQ02](https://openairdocs.org/ntsb/LAX82DXQ02.md): Bell 206B · Ely, NV · Accident · No injuries · Closed · Nov 17, 1981 · N3893Y · Substantial damage
- [NTSB DEN81FA062](https://openairdocs.org/ntsb/DEN81FA062.md): Hughes 369D · Afton, WY · Accident · Minor injuries · Closed · Aug 27, 1981 · N58256 · Substantial damage
- [NTSB ANC81FA064](https://openairdocs.org/ntsb/ANC81FA064.md): Hughes 369D · Tanacross, AK · Accident · Minor injuries · Closed · Jun 19, 1981 · N11035 · Substantial damage
- [NTSB DEN81FA022](https://openairdocs.org/ntsb/DEN81FA022.md): Bell 206A · Evanston, WY · Accident · No injuries · Closed · Mar 16, 1981 · N7881S · 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 year(c."eventDate") = 1981
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&year=1981

---
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.