What happened
The pilot reported that the aircraft engine lost power while climbing after takeoff. Unable to restore engine operation, the pilot executed a forced landing in terrain that was not suitable for such an emergency.
The investigation
A postaccident examination of the mechanical fuel pump revealed that the actuator arm was worn. This wear prevented the pump from generating adequate fuel pressure and volume to maintain engine power. The pump had accumulated 1,007 hours of operation. There is no manufacturer requirement for inspecting this component during its service life.
Findings
The investigation determined that the worn actuator arm on the mechanical fuel pump was the primary factor in the loss of engine power. The lack of a mandatory inspection interval for this part contributed to the failure going undetected prior to the accident.