What happened
The pilot reported that during the course of conducting agricultural spraying operations, he observed a significant and sudden loss of engine power. Unable to maintain altitude or airspeed, the pilot attempted to execute an emergency landing in an adjacent bean field. The approach resulted in a run-on landing rather than a controlled touchdown. As the aircraft settled onto the ground, the left skid dug into a furrow within the field. This impact caused the helicopter to roll over.
The investigation
A thorough mechanical investigation was conducted following the accident. This process included a complete teardown of the engine to examine internal components for signs of failure or malfunction. Despite this extensive examination, investigators were unable to identify any mechanical defect or reason that would explain the initial loss of power reported by the pilot.
Findings
The primary factor leading to the damage was the uncontrolled rollover after landing. The investigation confirmed that while the engine teardown yielded no definitive mechanical cause for the power loss, the physical sequence of events was clear: the sudden loss of power necessitated an emergency landing, and the subsequent impact with a furrow caused the rollover.