Incident Summary
A pilot was returning to the airport when the aircraft's engine failed, prompting a landing in a wheat field. The aircraft was equipped with a Continental 6-285 "Tiara" geared engine.
Pilot Statement
According to the pilot, after pulling out of a field, an abnormal vibration was felt. The pilot reduced the throttle by 100 rpm, after which the engine appeared to operate normally. However, after traveling approximately half a mile, the engine shook violently and then stopped completely.
Postaccident Examination
A postaccident inspection revealed that the propeller driver gear shaft on the engine was protruding from the front of the engine by approximately one inch beyond its normal position. The engine could not be rotated manually. No other anomalies were found in the engine or airframe that could be associated with a preexisting condition.