What happened
The pilot was operating the aircraft during cruise flight when the engine began to run roughly. Shortly thereafter, the engine lost power completely. In response to the mechanical failure, the pilot executed a forced landing. During the impact of the landing, the airplane wing broke off.
The investigation
Following the accident, investigators examined both the fuel system and the engine to determine the cause of the power loss. The examination failed to identify any specific reason for the loss of power. To verify the engine's condition after the incident, the airplane was placed on a trailer. The engine was then started and ran normally, indicating no apparent mechanical defect remained.
Findings
The sequence of events indicates that an unexplained engine failure during cruise led to a forced landing. The structural integrity of the wing was compromised upon impact with the ground.