What happened
During the initial climb phase following takeoff, the pilot detected an unusual engine noise accompanied by fluctuations in oil pressure. Recognizing that the aircraft lacked the altitude necessary to return to the departure airport, the pilot elected to shut down the engine and execute a forced landing. The aircraft landed on its wheels in a newly planted corn field.
The investigation
A post-accident examination of the engine revealed significant internal damage consistent with oil starvation. Specifically, evidence indicated that the number 4 rod bearing, the number 5 rod bearing, and the main bearing had suffered from insufficient lubrication. This condition led to the subsequent failure of the number 5 connecting rod.
Findings
The investigation determined that the occurrence was initiated by the slippage of a bearing. This mechanical failure resulted in oil starvation across multiple critical bearings, ultimately causing the engine to cease operation during the climb.