Accident Summary
The pilot reported that shortly after takeoff, the engine began to vibrate and the control stick shook. He initiated a shallow left turn, during which the engine started losing power. As he rolled out of the turn, the engine quit. He executed a forced landing in a soft field, and the airplane nosed over.
Pilot Report
The pilot stated that after takeoff, abnormal engine vibrations and control stick shaking occurred. A shallow left turn was initiated, and the engine began to lose power. Upon rolling out of the turn, the engine lost all power. The pilot then performed a forced landing in a soft field, resulting in the aircraft nosing over.
Engine Examination
Postaccident examination of the engine revealed ferrous metal in the oil sump. However, the filters and screens were clear of debris. A spokesman from the disassembly facility indicated that there was evidence suggesting the main bearing had failed, which caused the engine to seize.