# Final NTSB investigations: Aviation International Rotors CH-54A

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 LAX07LA210](https://openairdocs.org/ntsb/LAX07LA210.md): Aviation International Rotors CH-54A · Los Olivos, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 8, 2007 · N44094 · Substantial damage
  > The company mechanic's inadequately performed maintenance and inspection, which resulted in a flight control malfunction and loss of control during takeoff.
- [NTSB LAX06GA254](https://openairdocs.org/ntsb/LAX06GA254.md): Aviation International Rotors CH-54A · Happy Camp, CA · Accident · 2 fatal · Final report · Aug 5, 2006 · N6156U · Substantial damage
  > The fatigue failure of tail rotor blade spindle, which resulted in the separation of the blade and tail rotor gearbox.
- [NTSB ANC93IA176](https://openairdocs.org/ntsb/ANC93IA176.md): Sikorsky C54A · Anita Bay, AK · Incident · No injuries · Incident investigation · Final report · Sep 12, 1993 · N44094 · Minor damage
  > The separation of the turbine blade from the power turbine disc.

## 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."completionStatus" = 'Completed'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8142507'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=8142507&status=final

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