Flight Details
The pilot departed with nearly full fuel tanks for a flight scheduled to last 20 minutes. During the flight, no unusual sounds or vibrations were reported. The pilot arrived at the destination airport and entered the downwind leg, after which the landing gear was lowered and the 'GUMP' checklist was completed.
Accident Sequence
According to the pilot, when he attempted to increase engine power, the engine did not respond, and the airplane continued descending. The pilot turned on the fuel boost pump and attempted to restart the engine, but was unsuccessful. Unable to glide to the runway, the pilot executed a forced landing in trees and brush.
Examination
An examination of the airplane revealed that both fuel tanks had ruptured. The left fuel tank was ripped open and found dry; the right tank contained approximately 10 gallons of fuel. The FAA coordinator examined the recovered airframe wreckage and the engine. The engine was started and functioned properly. Normal operation of both magnetos was noted, and no abnormal conditions were found.
Conclusion
The reason for the engine power loss was not determined. The investigation did not identify any mechanical or system failure that could account for the loss of power.