Accident Sequence
During the initial climb, as the helicopter reached an estimated altitude of approximately 200 feet above the ground, the engine experienced a few sputtering sounds before recovering. Shortly thereafter, the engine sputtered a second time. In response, the pilot initiated an autorotation maneuver, incorporating a 180-degree turn. The pilot reported that during the turn, airspeed decreased, prompting him to lower the nose in an attempt to regain speed.
Landing and Post-Impact
The helicopter subsequently made a hard landing in a slight nose-low attitude. After touchdown, it slid for about 50 feet. The toes of the landing gear skids dug into soft ground, causing the helicopter to nose over and come to rest on its right side.
Engine Examination
Following the accident, an examination of the engine revealed no anomalies that could have prevented normal operation.