Event Overview
Shortly after departure, the pilot reported an engine failure. Unable to return to the airport, the pilot executed a forced landing in an open field. During the landing, the aircraft collided with the terrain.
Engine Examination
During the subsequent examination of the engine, the fuel diverter valve was removed. Low air pressure was applied to all three fittings of the valve, but no airflow could be obtained through the valve. The valve was then disassembled.
Findings
Disassembly revealed that a piece of the plunger core, made of a rubber-type compound, had broken away from the plunger. This piece was lodged in the fuel outlet fitting, blocking the flow of fuel. No other mechanical failures or malfunctions were noted.