Partial Power Loss Leads to Forced Landing and Noseover in Rice Field (N9982)

Accident Narrative

While conducting an aerial spraying operation, the pilot encountered a partial power loss over the field he was treating. He was unable to sustain flight and executed a forced landing in a wet, soft rice field adjacent to the intended area. During the landing, the aircraft nosed over.

Engine Examination Findings

A subsequent examination of the engine identified the root cause of the power loss. The supercharger impeller shaft bearings had failed, leading to the failure of the supercharger impeller itself. Debris from the failed components contaminated the air intake system. This contamination caused both the intake and exhaust valves to become wedged in the open position, which resulted in the loss of engine power.