Incident Overview
According to the pilot, during cruise flight the engine began to run rough and lose power. Subsequently, a loud metallic sound was heard, and the engine vibrated violently before losing power entirely. The pilot executed a forced landing to a farm field, during which the airplane nosed over due to the soft terrain. This resulted in substantial damage to the wings.
Postaccident Inspection
A postaccident inspection was conducted. The inspection revealed that the crankshaft would not rotate. An internal examination of the cylinders and spark plugs did not identify a reason for the power loss. The oil system was also examined, and large amounts of metal particles were found in the oil. Due to a lack of suitable equipment and facilities, further disassembly of the engine was not attempted.
Probable Cause
The official probable cause was determined to be a loss of engine power due to internal failure.