Accident Cessna 170B N4366B, Thursday 11 May 1995

You can contribute by submitting additional or updated information.

Date:	Thursday 11 May 1995
Time:	17:15 LT
Type:	Cessna 170B
Owner/operator:	Private
Registration:	N4366B
MSN:	26710
Year of manufacture:	1955
Total airframe hrs:	3404 hours
Engine model:	Lycoming O-360-A1A
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Chickaloon, AK - United States of America
Phase:	En route
Nature:	Private
Departure airport:	Northway, AK (ORT)
Destination airport:	Soldotna, AK (SQX)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE PILOT REPORTED THE AIRPLANE'S PROPELLER, PROPELLER FLANGE AND A PORTION OF THE CRANKSHAFT SEPARATED FROM THE AIRPLANE WHILE CRUISING AT AN ALTITUDE OF 6,500' MSL. HE SAID THE ONLY AVAILABLE LANDING SITE WAS A NARROW ROAD, AND THAT HE WAS FORCED BY SURROUNDING TERRAIN TO LAND UPHILL AND DOWNWIND. THE AIRPLANE LANDED HARD, WENT OFF THE ROAD AND INTO A DITCH. THE MISSING PROPELLER AND COMPONENTS WERE NOT RECOVERED.

Probable Cause: THE FRACTURE OF THE CRANKSHAFT RESULTING IN SEPARATION OF THE PROPELLER AND PROPELLER FLANGE IN-FLIGHT. A FACTOR ASSOCIATED WITH THE ACCIDENT WAS THE LACK OF SUITABLE TERRAIN FOR AN EMERGENCY LANDING.

Accident investigation: