Flight and Emergency
During the flight in instrument meteorological conditions (IMC), the pilot reported low oil pressure to air traffic control and declared an emergency. Approximately four minutes after this report, the aircraft experienced a complete engine failure.
Engine Failure and Forced Landing
The pilot stated that he broke out of the overcast at about 250 feet above ground level (AGL). As he attempted to land in an open field, the aircraft impacted a power line.
Post-Accident Examination
Examination of the engine disclosed that the #2 main bearing had spun in the bearing support. This initiated the failure of the connecting rods and crankshaft, leading to the loss of engine power.
Probable Cause
The investigation determined that the spun #2 main bearing initiated the failure of the rods and crankshaft, which caused the engine failure.