Accident Champion 7EC N7547E, Monday 16 September 1991

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Date:	Monday 16 September 1991
Time:	18:10 LT
Type:	Champion 7EC
Owner/operator:	Private
Registration:	N7547E
MSN:	251
Engine model:	Continental O-200
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Coeur D'alene, ID - United States of America
Phase:	Manoeuvring (airshow, firefighting, ag.ops.)
Nature:	Private
Departure airport:	Athol, ID (S61)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
WHILE MANEUVERING OVER MOUNTAINOUS TERRAIN, THE ENGINE BEGAN TO RUN ROUGH. THE PILOT INITIATED A FORCED LANDING IN AN OPEN FIELD. DURING THE LANDING ROLL, THE AIRPLANE NOSED OVER. POST-CRASH INSPECTION OF THE ENGINE REVEALED THAT THE FUEL SYSTEM VENT WAS BLOCKED BY ACCUMULATIONS FROM MUD DAUBERS.

Probable Cause: A BLOCKED FUEL SYSTEM VENT, AND AN INADEQUATE AIRCRAFT PREFLIGHT BY THE PILOT. ROUGH TERRAIN IN THE EMERGENCY LANDING AREA WAS A RELATED FACTOR.

Accident investigation: