Accident Hiller UH-12D N62431, Wednesday 4 July 1990

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Date:	Wednesday 4 July 1990
Time:	07:15 LT
Type:	Hiller UH-12D
Owner/operator:	Blue Mountain Aviation
Registration:	N62431
MSN:	956
Total airframe hrs:	9084 hours
Engine model:	Lycoming VO-435-A1C
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Walla Walla, WA - United States of America
Phase:	Manoeuvring (airshow, firefighting, ag.ops.)
Nature:	Agricultural
Departure airport:	Walla Walla, WA
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE HELICOPTER WAS SUBSTANTIALLY DAMAGED DURING A FORCED LANDING, WHEN THE SKIDS CAUGHT IN PEA VINES OF THE CROP THE PILOT WAS SPRAYING. HE STATED THAT THE ENGINE SUSTAINED A SUDDEN POWER LOSS. DURING A POST-ACCIDENT CHECK, THE ENGINE STARTED NORMALLY AND RAN TO 3200 RPM.

Probable Cause: A LOSS OF ENGINE POWER FOR UNDETERMINED REASONS.

Accident investigation: