Accident Overview
About four months before the accident, the engine was removed from the airplane and overhauled by a local mechanic. The engine was installed the day before the accident. According to the investigation, during the engine installation, the mechanic failed to install new parts as directed by a mandatory service bulletin.
Flight and Power Loss
After a brief period of ground operation, the pilot departed for a test flight. Approximately five minutes into the flight, the engine lost oil pressure, which subsequently resulted in a complete loss of engine power. The pilot established an emergency descent for a forced landing at Collegedale Airport.
Collision with Terrain
The airplane collided with rising terrain 50 feet short of Runway 03. A film of engine oil was discovered over the aircraft skin aft of the engine compartment.
Wreckage Examination
Wreckage examination disclosed that the oil cooler return line separated at the metal fitting. According to the installation mechanic, the owner decided not to install new hoses as prescribed by a mandatory service bulletin.