# NTSB investigations: Allison 250-C30 series, 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 SEA00LA020](https://openairdocs.org/ntsb/SEA00LA020.md): Bell 206L-1 · Neihart, MT · Accident · No injuries · Limited investigation · Final report · Nov 17, 1999 · N519EH · Substantial damage
  > Clearance from an object was not maintained. Gusting wind conditions was a factor.
- [NTSB LAX00LA024](https://openairdocs.org/ntsb/LAX00LA024.md): Bell 206-L4 · Santa Clarita, CA · Accident · No injuries · Limited investigation · Final report · Oct 23, 1999 · N36R · Substantial damage
  > The pilot's delay in adding power during a power-on recovery from an autorotation, which resulted in a hard landing and rollover. The flight instructor's inadequate supervision of the flight was also causal.
- [NTSB FTW99LA240](https://openairdocs.org/ntsb/FTW99LA240.md): Bell 206-L3 · Main Pass 225a · Accident · Serious injuries · Limited investigation · Final report · Aug 26, 1999 · N6610E · Substantial damage
  > The pilot's failure to maintain directional control of the helicopter. A factor was the tailwind condition.
- [NTSB FTW99LA077](https://openairdocs.org/ntsb/FTW99LA077.md): Bell 206L-3 · West Delta 105b · Accident · No injuries · Limited investigation · Final report · Feb 1, 1999 · N6603X · Substantial damage
  > The pilot's failure to maintain clearance with the oil platform's windsock on final approach to landing.

## 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 ('03015'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03015&year=1999

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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.