# Accident 19880513046499A: Hughes 369D, Waialua, HI, May 13, 1988

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: May 13, 1988, 10:15 local time
- Place: Waialua, HI
- Airport: Private
- Damage: Destroyed
- Phase of flight: Hovering
- Operating rules: Rotorcraft external load (Part 133)
- Operator: CYHA
- Location: 21.5709° N, 158.1206° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=21.5709&lon=-158.1206&mi=10
- Aircraft: N4943T, a cancelled registration (https://openairdocs.org/deregistered/N4943T-2013-07-10) (OpenAirDocs)
- Registry model: Hughes Helicopters HUGHES 369D (registry code 4470706, https://openairdocs.org/model/hughes-helicopters-hughes-369d) (OpenAirDocs)
- Registry engine: Allison 250-C20 series (registry code 03020, https://openairdocs.org/engine/allison-250-c20-series) (OpenAirDocs)
- Reported make and model: HUGHES 369D
- Reported engine: ALLSN 250C20B
- Fatal injuries: 0
- Pilot flight hours: 8,600 total, 5,000 in this make and model, 250 in the last 90 days
- NTSB investigation: [NTSB LAX88LA179](https://openairdocs.org/ntsb/LAX88LA179) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19880513046499A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

BEGAN UNCOMMANDED TURN WHILE HOVERING TO LAND. REPORTED CYCLIC HARDOVER. POSSIBLE MALFUNCTIONED CYCLIC TRIM SWITCH.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX88LA179](https://openairdocs.org/ntsb/LAX88LA179), May 13, 1988: McDonnell Douglas 369D (N4943T), Waialua, HI, destroyed. Probable cause: FAILURE TO FOLLOW PROCEDURES ESTABLISHED BY THE MANUFACTURE FOR UNCOMMANDED TRIM INPUTS AND HIS DECISION TO MAKE A HOVER APPROACH TO LANDING.

## Other reports on N4943T (1)

Matched to the same aircraft by N-number and date.

- [Accident 19940606013959A](https://openairdocs.org/incident/19940606013959A), Jun 6, 1994: Hughes 369D (N4943T), Kaneoheoahu, HI, Substantial damage. During hover to unload paper bags in cargo net on long line. Bags blown up into tail rotor. Tail rotor separated.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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