# NTSB investigations: Hughes 269C, 1994

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 CHI95LA029](https://openairdocs.org/ntsb/CHI95LA029.md): Hughes 269C · Garden City, KS · Accident · No injuries · Limited investigation · Final report · Nov 2, 1994 · N9294F · Substantial damage
  > inadvertant engagement of the rotor drive system, while the helicopter had been left unattended by the pilot.
- [NTSB FTW95LA011](https://openairdocs.org/ntsb/FTW95LA011.md): Hughes 269C · Livingston, TX · Accident · No injuries · Limited investigation · Final report · Oct 10, 1994 · N9616F · Substantial damage
  > The improper flare resulting in an undershoot of the intended landing area. A factor was the bird strike.
- [NTSB LAX94LA306](https://openairdocs.org/ntsb/LAX94LA306.md): Hughes 269C · Puunene, Maui, HI · Accident · No injuries · Limited investigation · Final report · Aug 5, 1994 · N8376F · Substantial damage
  > the improper overhaul of the red blade main rotor damper, and the inadequate maintenance condition of the other rotor dampers and the landing gear dampers, which led to an uncorrectable ground resonance vibration and a subsequent rollover.
- [NTSB FTW94GA204](https://openairdocs.org/ntsb/FTW94GA204.md): Hughes 269C · London, TX · Accident · Minor injuries · Final report · Jun 20, 1994 · N7404F · Destroyed
  > The partial power loss due to a sticking valve. Factors were the remaining worn lobes on the camshaft and the lack of suitable terrain onto which a successful forced landing could be executed.
- [NTSB LAX94LA146](https://openairdocs.org/ntsb/LAX94LA146.md): Hughes 269C · Merced, CA · Accident · Minor injuries · Limited investigation · Final report · Mar 2, 1994 · N9593F · Substantial damage
  > the pilot's misjudgement of the descent rate and his delayed throttle application.
- [NTSB ATL94GA038](https://openairdocs.org/ntsb/ATL94GA038.md): Hughes 269C · Atlanta, GA · Accident · Serious injuries · Final report · Jan 16, 1994 · N8994F · Substantial damage
  > The inadvertent closing of the fuel shutoff valve by the pilot. A factor in the accident was the failure of the pilot to maintain rotor RPM during the autorotation.

## 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 year(c."eventDate") = 1994
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4470504'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4470504&year=1994

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