Accident Summary
A helicopter experienced a total loss of engine power while on final approach to a landing pad situated near the pilot's private residence. At the time of the power loss, the aircraft was approximately 100 feet above the surface of a lake. The subsequent descent resulted in an uncontrolled impact with the water.
Sequence of Events
The helicopter was in the process of approaching the designated landing area when the engine ceased producing power. The pilot did not execute the appropriate flight control inputs necessary to maintain a controlled autorotation. As a result, the helicopter underwent multiple rotations around its vertical axis during the descent. The aircraft then struck the water surface in an uncontrolled manner. Immediately after impact, the helicopter sank and came to rest in water approximately 20 feet deep.
Investigation Findings
The investigation determined that there was no indication of any mechanical failure or malfunction within the helicopter. The engine power loss occurred without any apparent technical defect. The pilot's failure to apply proper flight control inputs for autorotation was noted as the reason for the loss of control during the descent.