# NTSB investigations: Rolls-Royce 250-C20B: Sys/Comp malf/fail (non-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 CEN24LA358](https://openairdocs.org/ntsb/CEN24LA358.md): Hughes 369 · Canton, MI · Accident · No injuries · Class 3 · Limited · Final report · Sep 11, 2024 · N8969F · Substantial damage
  > Fatigue cracking of the main rotor blade that occurred at an undetermined time.
- [NTSB ERA19FA118](https://openairdocs.org/ntsb/ERA19FA118.md): Hughes 369 · Talking Rock, GA · Accident · 1 fatal · Class 3 · Field · Final report · Mar 5, 2019 · N89ZC · Substantial damage
  > A fatigue failure of the overrunning clutch subassembly due to abnormal bending loads due to cracks on the center engine mount, which resulted in an inflight loss of power. Contributing to the accident was the helicopter's low altitude and airspeed when the…
- [NTSB WPR17LA113](https://openairdocs.org/ntsb/WPR17LA113.md): Bell 206B · Rockville, ID · Accident · Serious injuries · Limited investigation · Final report · May 26, 2017 · N24FS · Substantial damage
  > The in-flight failure of the engine-to-transmission drive shaft due to a fatigue fracture of one of the KAflex flex frames caused by a loose bolt, which resulted in a total loss of engine power and a subsequent hard 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 c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('54385')
    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" = '330'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/330/cases?engine=54385

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