Teardown Findings
Teardown of the aircraft engine revealed that the counterweight vibration damper assembly was out of tolerance. This condition allowed excessive engine vibration, which led to the failure of the camshaft drive gear and a subsequent total loss of engine power.
Forced Landing
After the engine failed, the pilot executed a forced landing into a wooded area. The pilot reported that altitude would not permit reaching the Georgetown Airport. To minimize impact speed, the pilot stalled the aircraft and allowed it to settle into the trees.
Passenger Seating Configuration
The aircraft was equipped with one passenger seat. At the time of the incident, two passengers were on board. The rear passenger jumpseat had been removed, and the second passenger was seated in the cargo area behind the crew compartment.
Probable Cause
The probable cause of the engine failure was the counterweight vibration damper assembly being out of tolerance, allowing excessive vibration that resulted in the failure of the camshaft drive gear and total engine failure.