# NTSB investigations: Allison 250 SER 250HP, 1994

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 SEA95LA023](https://openairdocs.org/ntsb/SEA95LA023.md): Fairchild Hiller FH-1100 · Yamhill, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 19, 1994 · N4258V · Substantial damage
  > Failure of the pilot to maintain adequate altitude/clearance, while maneuvering to a hover, which allowed the external load cable/hook to become snagged and to rebound into the path of the main rotor blades.
- [NTSB FTW95LA032](https://openairdocs.org/ntsb/FTW95LA032.md): Bell 206L-3 · Ruston, LA · Accident · No injuries · Limited investigation · Final report · Oct 27, 1994 · N206SF · Substantial damage
  > The pilot's improper handling of the helicopter after an apparent loss of power during a practice autorotation.
- [NTSB LAX94LA387](https://openairdocs.org/ntsb/LAX94LA387.md): Hughes 369D · Pacific Ocean (Pacific Ocean) · Accident · Serious injuries · Limited investigation · Final report · Sep 24, 1994 · N58400 · Destroyed
  > failure of the helicopter's main rotor pitch change link (control rod). The helicopter was not recovered and the Safety Board was unable to determine the pitch change link's failure mode.
- [NTSB LAX94FA372](https://openairdocs.org/ntsb/LAX94FA372.md): Hughes 369D · Genoa, NV · Accident · Minor injuries · Field investigation · Final report · Sep 22, 1994 · N58352 · Substantial damage
  > The pilot/operator's operation of the helicopter with a disconnected throttle on the right collective; the FAA inspector's inadequate preflight/pretakeoff checks of the flight control/throttle systems; and the pilot/operator's failure to adequately inform the…
- [NTSB ANC94LA064](https://openairdocs.org/ntsb/ANC94LA064.md): Hiller FH1100 · Tyonek, AK · Accident · No injuries · Limited investigation · Final report · Jun 4, 1994 · N746FH · Substantial damage
  > The pilot's selection of unsuitable terrain for landing which resulted in a dynamic rollover. A factor was the soft landing area selected.
- [NTSB FTW94LA093](https://openairdocs.org/ntsb/FTW94LA093.md): Bell 206BIII · Lake Charles, LA · Accident · Minor injuries · Limited investigation · Final report · Mar 10, 1994 · N57340 · Substantial damage
  > The failure of the pilot to adequately perform a preflight. A factor was the soft terrain.

## 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") = 1994
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03002', '03003'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03002&year=1994

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