Accident Overview
On April 9, 1983, a pilot performed maintenance in the engine compartment before a flight. The pilot was known to conduct his own maintenance, including using a sealer to stop an oil gasket leak. After takeoff, during the climb, the pilot turned back to the departure airport and then diverted toward Baltimore/Washington International Thurgood Marshall Airport (BWI) due to an engine problem. The engine lost power, and the pilot attempted to land on a school yard, but the aircraft crashed and burned before reaching it.
Examination Findings
An examination of the engine revealed fatigue cracks and a hole in the #4 cylinder. Polishing of a displaced piece of the cylinder and deposits in the cracks indicated that the cracks had been present for an unknown period. Foam pads, intended to keep birds out of the engine compartment while parked, were found in the air/vent holes of the cowling.
A teardown of the engine disclosed the following:
- The #2 fuel nozzle was partially obstructed.
- The left magneto was improperly adjusted.
- Rubber material resembling silicone sealer was found in the oil system, but no blockage of the oil system was noted.
- Evidence of heat in engine bearing journals was observed.
- The right fuel cap was not vented.
The pilot's medical certificate had expired. The engine was described as high time. A propeller strike occurred.