Accident Helio H-391B N4101D, Friday 6 December 1985

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Date:	Friday 6 December 1985
Time:	15:34 LT
Type:	Helio H-391B
Owner/operator:	Boyne Mountain Lodge, Inc.
Registration:	N4101D
MSN:	016
Total airframe hrs:	583 hours
Engine model:	Lycoming GO-435
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Bozeman, MT - United States of America
Phase:	En route
Nature:	Private
Departure airport:	Bozeman, MT (KBZN)
Destination airport:	Portland, OR
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
ACCORDING TO PERSONNEL IN THE AREA, THE PLT RADIOED HE HAD SMOKE IN THE COCKPIT AND WAS RETURNING TO GALLANTIN FIELD, HIS DEPARTURE POINT. LATER, THE PLT TRANSMITTED THAT THE ENG LOST TOTAL PWR AND HE WAS MAKING A FORCED LANDING. DURING THE INVESTIGATION, IT WAS ASCERTAINED THE WIRING BETWEEN THE INSTRUMENT PANEL AND THE MAGNETOS HAD BURNED EXTENSIVELY AND THE MAGNETO 'P' LEAD HAD SHORTED OUT.

Probable Cause:

Accident investigation: