What happened
Approximately ten flight hours prior to the incident, a timing adjustment was performed on the aircraft's engine. Shortly thereafter, while the aircraft was approximately 10 feet above ground level, the pilot experienced a sudden decrease in power output of roughly 300 to 400 RPM. In response to this loss of thrust, the pilot elected to execute an emergency landing straight ahead into a cut bean field located near the runway.
The aircraft touched down approximately 400 feet from the end of the runway and continued its forward momentum for about 500 additional feet. During this ground roll, the aircraft struck a large rut in the field, which likely contributed to the extent of the damage sustained during the incident.
The investigation
The investigation focused on the mechanical state of the aircraft following the reported power loss. It was noted that a timing adjustment had been made to the engine shortly before the event. The physical evidence from the landing site confirmed the trajectory and impact with ground obstacles, but no further mechanical failures were detailed in the immediate narrative beyond the initial power decrease.
Findings
The primary factor leading to the incident was the sudden loss of engine power at a critical low altitude. The timing of this event relative to the recent maintenance work suggests a potential correlation with the timing adjustment performed on the engine. The pilot's decision to land in an unprepared field resulted in additional damage from ground contact.