Accident Piper PA-25-235 N4488Y, Thursday 14 May 1992

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Date:	Thursday 14 May 1992
Time:	09:30 LT
Type:	Piper PA-25-235
Owner/operator:	Private
Registration:	N4488Y
MSN:	25-4151
Year of manufacture:	1966
Total airframe hrs:	5639 hours
Engine model:	Lycoming O-540
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Chubbuck, ID - United States of America
Phase:	Manoeuvring (airshow, firefighting, ag.ops.)
Nature:	Agricultural
Departure airport:
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
DURING AN AERIAL APPLICATION FLIGHT, THE PILOT REPORTED THAT HE WAS AWARE OF AND HAD BEEN MANEUVERING UNDER THE POWER LINES THAT WERE NEAR THE FIELD. DURING A SWATH RUN IN THE MIDDLE OF THE FIELD, THE AIRPLANE COLLIDED WITH AN UNMARKED GUY WIRE THAT THE PILOT WAS NOT AWARE OF.

Probable Cause: INADEQUATE PREFLIGHT PLANNING/PREPARATION. A FACTOR TO THE ACCIDENT WAS: A GUY WIRE.

Accident investigation: