# NTSB investigations: Hughes 369HS: Airframe/component/system failure/malfunction

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 DEN05TA119](https://openairdocs.org/ntsb/DEN05TA119.md): Hughes 369HS · Albuquerque, NM · Accident · Serious injuries · Final report · Aug 6, 2005 · N500SD · Substantial damage
  > the bullet(s), which severed the helicopter's left tail rotor pedal. Contributing factors were the severed anti-torque pedal and the unsuitable terrain for landing.
- [NTSB LAX00LA103](https://openairdocs.org/ntsb/LAX00LA103.md): Hughes 369HS · Pacific Ocean (Pacific Ocean) · Accident · No injuries · Limited investigation · Final report · Feb 14, 2000 · N717ST · Destroyed
  > An unknown mechanical malfunction that resulted in a precautionary landing at sea and the subsequent sinking of the helicopter by an ocean swell.
- [NTSB LAX99LA253](https://openairdocs.org/ntsb/LAX99LA253.md): Hughes 369HS · Pacific Ocean (Pacific Ocean) · Accident · Minor injuries · Limited investigation · Final report · Jun 7, 1999 · N4278M · Destroyed
  > The removal of the tail rotor blade abrasion strips by the use of an unapproved method by the maintenance personnel which resulted in the imbalance of the tail rotor blade assembly and subsequent separation of the 90-degree gear box; the pilot/mechanic's…
- [NTSB LAX91LA172](https://openairdocs.org/ntsb/LAX91LA172.md): Hughes 369C · Papua, Papua New Guinea · Accident · Minor injuries · Limited investigation · Final report · Apr 2, 1991 · N9227F · Destroyed
  > The loss of control of the helicopter due to a restriction of the cyclic control system.
- [NTSB NYC90LA125](https://openairdocs.org/ntsb/NYC90LA125.md): Hughes 369HS · Brookville, PA · Accident · Serious injuries · Limited investigation · Final report · Jun 5, 1990 · N8315F · Destroyed
  > Worn tail rotor pitch control assembly, due to improper maintenance/installation, and subsequent fatigue failure of the tail rotor swashplate.
- [NTSB NYC90FA029](https://openairdocs.org/ntsb/NYC90FA029.md): Hughes 369HS · North Adams, MA · Accident · 2 fatal · Field investigation · Final report · Nov 15, 1989 · N9208F · Destroyed
  > Failure of the pilot-in-command (PIC) to assure proper rotor RPM and proper operation of the flight controls during an approach in gusty wind conditions. A factor related to the accident was: the pic's lack of experience in the type of operation.
- [NTSB CHI86LA219](https://openairdocs.org/ntsb/CHI86LA219.md): Hughes 500 (369HS) · West Lafayette, IN · Accident · Minor injuries · Limited investigation · Final report · Sep 6, 1986 · N2254X · Destroyed
  > The helicopter was at a low altitude hover video taping an athletic event when the aft flex coupling on the tail rotor failed. The plt was unable to regain control and during descent the main rotor blades struck the roof of a residence. The helicopter then…
- [NTSB DEN85FA180](https://openairdocs.org/ntsb/DEN85FA180.md): Hughes 369HS · Keystone, SD · Accident · 4 fatal · Field investigation · Final report · Jul 6, 1985 · N5410W · Destroyed
  > Main rotor hub was overhauled by a repair station that was not authroized by Hughes helicopters for hub overhauls. The main rotor hub and blades separated in-flt 279 hrs after overhaul. The acft crashed in a densily wooded area. Post accident exam of the main…

## 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.aircraft_model_code IN ('4470728')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 130))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4470728&occurrence=130

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