# NTSB investigations: Allison T63 series: Loss of engine power(total) - mech failure/malf

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 DFW06LA027](https://openairdocs.org/ntsb/DFW06LA027.md): Arrow Falcon Exporters Arrow F OH-58A · West Memphis, AR · Accident · 1 fatal · Limited investigation · Final report · Nov 5, 2005 · N331TA · Destroyed
  > The loss of engine power due to a disconnected pneumatic (Pc) line. A contributing factor was the ravine.
- [NTSB LAX05FA264](https://openairdocs.org/ntsb/LAX05FA264.md): San Joaquin Helicopters OH-58A+ · Lancaster, CA · Accident · 1 fatal · Field investigation · Final report · Aug 10, 2005 · N177SJ · Substantial damage
  > The pinion to turbine shaft coupling failed in fatigue due to a misaligned turbine shaft, which resulted in a loss of engine power.
- [NTSB LAX98LA134](https://openairdocs.org/ntsb/LAX98LA134.md): Bell OH-58A · Huron, CA · Accident · Minor injuries · Limited investigation · Final report · Apr 9, 1998 · N176SJ · Substantial damage
  > A loss of engine power due to deteriorated O-ring seals in the fuel boost pump, which allowed air to enter the fuel lines. Factors in the accident were the inadequate manufacturer's inspection criteria for the fuel boost pump O-ring seals and the resulting…

## 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 ('03031')
    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" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03031&occurrence=351

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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.