Event Description
Approximately 5 miles from the departure airport, the engine began to lose power. The pilot turned the airplane back toward the airport, but the engine regained power, and the pilot chose to continue the flight. About 25 minutes later, the engine gradually lost power again, and after 2 minutes, it experienced a total loss of power. The pilot attempted to restore engine power by checking the magnetos and fuel boost pump, and adjusting the throttle, mixture, and propeller settings. Unable to restart the engine, the pilot initiated a forced landing to a field.
During the forced landing, the airplane struck a ditch, flipped over, and came to rest inverted.
Examination and Findings
A subsequent examination of the engine and airframe revealed no anomalies. The engine was test run at various low power settings with no anomalies noted. The reason for the total loss of engine power was not determined.