# NTSB investigations: Allison 250 SER 400HP: Loss of engine power

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 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.
- [NTSB FTW98LA187](https://openairdocs.org/ntsb/FTW98LA187.md): Bell 206B · Cameron, LA · Accident · No injuries · Limited investigation · Final report · Apr 17, 1998 · N59604 · Substantial damage
  > The loss of engine power for undetermined reasons and the pilot's improper flare which resulted in a hard landing.
- [NTSB IAD98FA005](https://openairdocs.org/ntsb/IAD98FA005.md): Bell 206B · Sago, WV · Accident · 4 fatal · Field investigation · Final report · Oct 12, 1997 · N911RH · Destroyed
  > The improper overhaul of the turbine governor by the manufacturer, which resulted in the loss of power.
- [NTSB SEA97LA118](https://openairdocs.org/ntsb/SEA97LA118.md): Hughes 369D · Moclips, WA · Accident · No injuries · Limited investigation · Final report · May 21, 1997 · N8306F · Substantial damage
  > Inadequate installation of the fuel control by company maintenance personnel and a loose nut on a line. A disconnected Pc line was a factor.
- [NTSB LAX91LA198](https://openairdocs.org/ntsb/LAX91LA198.md): Hughes 369HS · Keanae, HI · Accident · Minor injuries · Limited investigation · Final report · May 5, 1991 · N9219F · Substantial damage
  > The total failure in fatigue of the helicopter's spur adapter gearshaft. A contributing factor was related to the lack of a suitable emergency landing site.
- [NTSB FTW88LA153](https://openairdocs.org/ntsb/FTW88LA153.md): Bell 206B · Pearland, TX · Accident · No injuries · Limited investigation · Final report · Aug 18, 1988 · N16962 · Substantial damage
  > The helicopter was at 300 feet AGL, making an approach after a maintenance test flight, when the engine overtemped and engine power was lost. During the autorotation landing, the helicopter touched down hard. The acft eng began to decelerate prior to…
- [NTSB LAX87LA161](https://openairdocs.org/ntsb/LAX87LA161.md): Bell 206B · Kona, HI · Accident · 1 fatal · Limited investigation · Final report · Mar 29, 1987 · N90153 · Destroyed
  > The pilot picked up two of the passengers at a resort hotel and then flew to kailua-Kona airport (koa). After hot refueling the helicopter with the two passengers on board, two more passengers boarded the helicopter and then the flight departed koa. When the…
- [NTSB ANC82DA039](https://openairdocs.org/ntsb/ANC82DA039.md): Hughes 369HS · Tok, AK · Accident · No injuries · Final report · May 4, 1982 · N9239F · Substantial damage
  > The pilot was conducting a non-revenue, sling-load operation on mt neuberer, while donating his services to Tok community tv, inc. he stated that he was lifting three empty propane bottles from a snow field when he noticed the auto relight lamp flash. He…

## 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 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')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 350))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03013&occurrence=350

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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.