Incident Overview
A pilot reported that while en route at an altitude of 3,500 feet, the engine began to vibrate. Approximately one minute later, oil started covering the windshield and the cockpit began filling with smoke. The pilot shut down the engine and searched for a suitable landing area.
Emergency Actions
Before landing, the pilot restarted the engine, but the oil and smoke conditions worsened, prompting him to shut it down again.
Landing and Damage
During the landing in a farmer's field, the landing gear struck an unseen furrow and was damaged.
Post-Accident Examination
An examination of the engine revealed that the #5 piston had failed, which resulted in a punctured engine case.