# NTSB investigations: Hughes 369HS, 1997

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 LAX98LA053](https://openairdocs.org/ntsb/LAX98LA053.md): McDonnell Douglas 369HS · Saipan, India · Accident · Minor injuries · Limited investigation · Final report · Dec 6, 1997 · N9068F · Destroyed
  > The failure of the maintenance facility to comply with the service bulletins, which resulted in the development of a corrosion pit, subsequent leakage and failure of the acceleration bellows of the fuel control.
- [NTSB LAX97LA218](https://openairdocs.org/ntsb/LAX97LA218.md): Hughes 369HS · Pacific Ocean (Pacific Ocean) · Accident · 1 fatal · Limited investigation · Final report · Jun 20, 1997 · N4250N · Destroyed
  > The unapproved field modification of the cyclic trim switch, including the use of non-standard parts, which resulted in a hard-over lateral trim failure, and the pilot's subsequent failure to maintain control of the helicopter during a landing approach. A…
- [NTSB LAX97LA120](https://openairdocs.org/ntsb/LAX97LA120.md): McDonnell Douglas MD 369HS · Pacific Ocean (Pacific Ocean) · Accident · No injuries · Limited investigation · Final report · Mar 11, 1997 · N95MS · Destroyed
  > A loss of engine power due to a deteriorated compressor air seal, which resulted from inadequate maintenance inspection of the helicopter to detect corrosion in the compressor case while being operated in a marine environment.
- [NTSB FTW97LA079](https://openairdocs.org/ntsb/FTW97LA079.md): Hughes 369HS · Wellington, CO · Accident · Minor injuries · Limited investigation · Final report · Jan 7, 1997 · N9089F · Destroyed
  > The pilot's failure to maintain control of the aircraft and his improper autorotation technique that induced the roll and subsequent ground collision. A factor was his lack of recurrent training.

## 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") = 1997
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4470728'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4470728&year=1997

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