# NTSB investigations: Hughes Helicopters HUGHES 369D, UT

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 WPR23LA063](https://openairdocs.org/ntsb/WPR23LA063.md): Hughes 369D · La Sal, UT · Accident · No injuries · Class 4 · Limited · Final report · Dec 8, 2022 · N458HW · Substantial damage
  > The pilot’s failure to maintain clearance from terrain during a toe-in landing to sloping terrain which resulted in a loss of helicopter control.
- [NTSB LAX08FA233](https://openairdocs.org/ntsb/LAX08FA233.md): Hughes 369D · Price, UT · Accident · 3 fatal · Field investigation · Final report · Jul 19, 2008 · N400BE · Destroyed
  > The pilot's inadequate preflight performance planning for the takeoff and the loading that exceeded the lift performance capability of the helicopter.
- [NTSB SEA06LA135](https://openairdocs.org/ntsb/SEA06LA135.md): Hughes 369D · Moab, UT · Accident · No injuries · Limited investigation · Final report · Jun 30, 2006 · N369PB · Substantial damage
  > The failure of the collective bungee support bracket due to non-compliance with a service information notice, which resulted in the pilot executing a precautionary autorotative landing. A contributing factor was the lack of suitable terrain for the landing.
- [NTSB SEA06LA124](https://openairdocs.org/ntsb/SEA06LA124.md): Hughes 369D · Salt Lake City, UT · Accident · No injuries · Limited investigation · Final report · Jun 20, 2006 · N88SE · Substantial damage
  > A loss of rotor rpm for undetermined reasons, resulting in a hard landing on top of the commercial building over which the helicopter was working.
- [NTSB DEN99TA031](https://openairdocs.org/ntsb/DEN99TA031.md): Hughes 369D · Woodruff, UT · Accident · No injuries · Final report · Jan 4, 1999 · N5013P · Substantial damage
  > A partial loss of engine power due to erosion in the compressor assembly module. Factors were a missing rotating labyrinth seal, the installation of which had not been performed by unknown maintenance personnel.
- [NTSB DEN83FA215](https://openairdocs.org/ntsb/DEN83FA215.md): Hughes 369D · Woodruff, UT · Accident · Minor injuries · Field investigation · Final report · Sep 12, 1983 · N8667F · Substantial damage
  > The helicopter was being used to lift seismic materials on a 100 ft long line. After lifting the load to a hover at about 10 to 20 ft, the plt heard a loud 'bang' which was followed by a loss of directional control. The helicopter began uncontrolled spinning…
- [NTSB DEN82DA073](https://openairdocs.org/ntsb/DEN82DA073.md): Hughes 369D (500D) · Coalville, UT · Accident · Minor injuries · Final report · Apr 27, 1982 · N8684F · Substantial damage
  > The helicopter made a hard landing after the pilot experienced a power train failure while flying low and slow. The weather was VMC and a VFR flight plan was filed. The crew was searching for lost mining equipment in a low slow search pattern. The pilot heard…

## 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."eventStateOrRegion" = 'UT' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4470706'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4470706&state=UT

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