# NTSB investigations: Allison 250 SER 400HP, 1999

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 FTW00RA039](https://openairdocs.org/ntsb/FTW00RA039.md): Bell 206-L1 · Cabinda, Angola · Accident · 1 fatal · Foreign investigation · Dec 1, 1999 · N5005B
- [NTSB LAX99LA293](https://openairdocs.org/ntsb/LAX99LA293.md): Bell 206B · Delhi, CA · Accident · No injuries · Limited investigation · Final report · Sep 1, 1999 · N59551 · Substantial damage
  > The loss of engine power due to the pilot's inadequate preflight, which failed to detect water contamination of the fuel system. The operator's inadequate maintenance of the loose fitting fuel cap and the deformed filler opening, which allowed water to leak…
- [NTSB ANC99TA090](https://openairdocs.org/ntsb/ANC99TA090.md): Bell 206B · Deadhorse, AK · Accident · No injuries · Final report · Jul 8, 1999 · N47122 · Substantial damage
  > A failure of the pilot-in-command to perform an adequate preflight inspection, and remove a rotor blade tie-down strap.
- [NTSB SEA99LA082](https://openairdocs.org/ntsb/SEA99LA082.md): Hughes 369D · Southbend, WA · Accident · Minor injuries · Limited investigation · Final report · Jun 8, 1999 · N8306F · Substantial damage
  > The complete loss of power, due to a failure of the compressor impeller disk. Factors include the low altitude of the helicopter at the time of the power loss, and the need to autorotate in a confined 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 year(c."eventDate") = 1999
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03013', '03012'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03013&year=1999

---
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.