Accident Overview
An aircraft experienced a partial loss of engine power during its departure. The pilot initiated a turn back toward the departure airport. Shortly after the turn, the oil pressure gauge indicated zero. The engine subsequently lost all power. The pilot executed a forced landing, during which the aircraft collided with a fence and a ditch. A post-crash fire erupted and completely consumed the aircraft.
Engine Examination
A post-crash examination of the engine assembly was conducted. The examination revealed that the number 1, 2, and 3 connecting rods were disconnected from the crankshaft. The rod bearings were burned and scored. The engine oil pump was found intact. However, the engine accessories had burned away during the fire. The cause of the connecting rod separation could not be determined due to the destruction of the accessories.
Investigation Outcome
Despite the physical evidence of the connecting rod separation and bearing damage, the exact reason for the separation could not be established. The investigation did not identify any other contributing factors.