# Accident 19990104004689A: Hughes 369D, Woodruff, UT, January 4, 1999

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: January 4, 1999
- Place: Woodruff, UT
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: General operating rules (Part 91)
- Location: 41.4696° N, 111.2306° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=41.4696&lon=-111.2306&mi=10
- Aircraft: N5013P, a cancelled registration (https://openairdocs.org/deregistered/N5013P-2017-06-30) (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
- People aboard: 3
- Fatal injuries: 0
- NTSB investigation: [NTSB DEN99TA031](https://openairdocs.org/ntsb/DEN99TA031) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19990104004689A

## Narrative

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

(.19) ON JANUARY 4, 1999, APPROXIMATELY 1645 MOUNTAIN STANDARD TIME, A HUGHES 369D, N5013P, REGISTERED TO AND OPERATED BY HAWKINS & POWERS AVIATION, INC., WAS SUBSTANTIALLY DAMAGED DURING A HARD LANDING 7 MILES SOUTH OF WOODRUFF, UTAH. THE COMMERCIAL PILOT AND TWO PASSENGERS WERE NOT INJURED.  VISUAL METEOROLOGICAL CONDITIONS PREVAILED, AND NO FLIGHT PLAN HAD BEEN FILED FOR THE AERIAL OBSERVATION FLIGHT BEING CONDUCTED UNDER TITLE 14 CFR PART 91.  THE FLIGHT ORIGINATED AT RANCH NEAR WOODRUFF, UTAH, APPROXIAMTELY 30 MINUTES BEFORE THE ACCIDENT.  PRELIMINARY INFORMATION INDICATES THE HELICOPTER HAD BEEN CHARTERED BY DESERT LAND AND CATTLE COMPANY FOR PREDATOR CONTROL .  THE PILOT REPORTED THAT WHILE MANEUVERING, THE COMPRESSOR STALLED AND THE ENGINE LOST POWER.  A HARD LANDING ENSUED AND THE HELICOPTER ROLLED OVER ON ITS SIDE.                                                               (-23) HELICOPTER EXPERIENCED AN APPARENT COMPRESSOR STALL WHILE FLYING AT HIGH DENSITY ALTITUDE, MAXIMUM MANEUVERING, LOW ALTITUDE, LOW AIRSPEED, DOWNWIND, DOWN SLOPE CONDITIONS.  THE HELICOPTER ROTOR RPM DECAYED AND THE HELICOPTER SETTLED, THE TAIL ROTOR STRUCK THE TERRAIN AND CONTROL WAS LOST.  TH E HELICOPTER IMPACTED THE GROUND AND ROLLED OVER ON ITS SIDE. SUBSTANTIAL DAMAGE - NO INJURIES.

## 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 DEN99TA031](https://openairdocs.org/ntsb/DEN99TA031), Jan 4, 1999: Hughes 369D (N5013P), Woodruff, UT, substantial damage. Probable cause: 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…

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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