Event Summary
A commercial pilot experienced a loss of engine power while cruising. He observed the fuel pressure decreasing and responded by advancing the throttle fully forward, activating the fuel boost pump, and switching fuel tanks. However, he could not recall which tank the fuel selector was positioned on when the power loss occurred. Despite these actions, engine power was not regained, and the pilot executed a forced landing in a vineyard.
Postaccident Findings
Following the landing, recovery personnel drained fuel from the aircraft: approximately a quarter of an ounce from the fuel strainer, 7 ounces from the left fuel tank, and 9.8 gallons from the right fuel tank. A postaccident inspection of the airplane revealed no preimpact mechanical anomalies. An FAA inspector was present during the inspection.
Engine Run
Fresh gasoline was added to the left fuel tank, and the engine was started and run without any observed abnormalities. The engine operated normally, indicating no mechanical issues were present at the time of the test.