NTSB Identification: SEA98LA177.
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Accident occurred Monday, September 14, 1998 in SPRAY, OR
Probable Cause Approval Date: 01/11/2000
Aircraft: Stinson 108-1, registration: N8666K
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
The pilot reported through counsel that on descent to his destination, he experienced a 'rough engine' and attempted a precautionary landing at a farm airport. He stated he 'misjudged [a] power line on approach' to the precautionary landing area, striking the power line and landing hard in a farm field. The pilot's report indicated no mechanical malfunction or failure was involved, expressing a belief that the power loss was due to carburetor icing. Temperature and dewpoint reported at the nearest weather observation station during the accident time frame did not indicate that a carburetor ice hazard existed. An FAA inspector who examined the wreckage the day after the accident found the airplane's fuel tanks nearly full of automotive or mixed automotive/aviation fuel; however, the pilot's accident report indicated the pilot did not know how much fuel was on board at the last takeoff. The pilot had not received a required biennial flight review in approximately 11 years, and he did not possess a current medical certificate. Additionally, the airplane had not received any inspections in the last 4 years.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: A partial loss of engine power, and the pilot's subsequent misjudgment of clearance with a transmission wire during a precautionary landing approach. The reason for the power loss was not determined; however, the pilot reported that it was not of a mechanical nature. The transmission wire was a factor. Full narrative available
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