# NTSB investigations: AiResearch TPE331 series: Loss of engine power (total)

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 CEN21LA287](https://openairdocs.org/ntsb/CEN21LA287.md): Grumman G164 · Sedgwick, AR · Accident · No injuries · Class 3 · Limited · Final report · Jun 20, 2021 · N62375 · Substantial damage
  > The total loss of engine power due to the failure and disengagement of the torque sensor assembly front spur gear from its splined shouldered shaft due to a loose self-locking nut.
- [NTSB CEN19LA231](https://openairdocs.org/ntsb/CEN19LA231.md): Ayres S2R · Breckenridge, MI · Accident · No injuries · Class 3 · Limited · Final report · Jul 21, 2019 · N766BF · Substantial damage
  > A total loss of engine power due to a lack of oil in the engine. The source of the inflight oil leak could not be determined based on the available information.
- [NTSB CEN15LA202](https://openairdocs.org/ntsb/CEN15LA202.md): Fairchild SA227 AC · Rifle, CO · Accident · No injuries · Limited investigation · Final report · Apr 17, 2015 · N2691W · Substantial damage
  > The uncontained engine failure due to the fatigue failure of the second-stage turbine rotor disk.

## 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 ('01514', '01517')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '341'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/341/cases?engine=01514

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