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their attendant overspeeds. The pilot's failure to correctly analyze the engine malfunction; to perform the feathering procedure in the prescribed manner; and to analyse the feathering system malfunctlon, all contributed to this condition. Furthermore, the inadequate information given to the pilot by RAPCON regarding the runway at Thun Field led the pilot to make a decision to land at that field. The go-around was a result of the physical appearance of the landing area and was successful until the left propeller oversped causing the pilot to lose control of the aircraft, resulting in a crash landing.
Probable Cause
The Board determines that the probable cause of this accident was the improper handling of an emergency situation, precipitated by a mechanical malfunction, which resulted in an unsuccessful single engine go-around.
A contributing factor was the failure of Radar Approach Control to provide complete, accurate airfield date to the pilot.
BY THE CIVIL AERONAUTICS BOARD.
/s/ ALAN S. BOYD
Chairman
/s/ ROBERT T. MURPHY
Vice Chairman
/s/ G. JOSEPH MINETTI
Member
/s/ WHITNEY GILLILLAND
Member
CHAN GURNEY, Member, did not take part in the adoption of this report.
