Incident Overview
Approximately 15 minutes after takeoff, the pilot of a single-engine airplane detected slight vibrations and an unusual noise that progressively increased in intensity. Shortly thereafter, the engine lost power. The pilot maneuvered the aircraft over hilly terrain toward an open field in an attempt to land.
Emergency Landing and Impact
While approaching the field in a rapid descent, the airplane struck power lines. The pilot managed to land the airplane in the field after the impact, but during the landing, the nose gear collapsed, resulting in structural damage to the aircraft.
Engine Examination
A subsequent examination and disassembly of the engine revealed that the crankcase had been penetrated. The #5 piston was separated at the piston boss area, and the skirt was shattered. The piston pin remained intact and was attached to a short section of the #5 connecting rod. The #5 connecting rod was found fractured in two places along its length, with the center section of the rod missing. Additionally, the camshaft exhibited numerous impact marks and was found separated into three parts.