What happened
The pilot conducted a preflight inspection of the aircraft, started the engine, and allowed it to idle for 10 minutes. Following the idle period, the pilot taxied to the runway, completed a run-up, and departed. During the climb, at an altitude of approximately 150 feet above the ground, the engine suffered a total loss of power.
The investigation
A FAA inspector examined the wreckage and found no evidence of mechanical malfunctions occurring prior to the impact. The investigation confirmed that there was sufficient fuel on board the aircraft and no signs of fuel contamination were present.
The engine, which was manufactured in 1963, had approximately 800 hours of operation since its last overhaul. According to the owner, the most recent overhaul took place sometime during the 1970s. While a witness observed that the fuel valve was in the 'on' position upon their arrival at the accident site, the pilot suggested that the fuel valve may have vibrated into a partially closed position during the flight.