Approach and Initial High Sink Rate
The helicopter's approach to the private helipad was uneventful until the last 100 feet, when the pilots observed a high sink rate. In response, the pilot increased collective pitch to correct the situation.
Power Loss and Touchdown
At approximately 20 feet from the intended touchdown point, the pilot noted a decrease in rotor RPM and realized a loss of engine power. During the subsequent touchdown, the tail cone contacted the edge of the helipad, resulting in damage to the tail rotor drive shaft.
Post-Accident Actions
After the event, the pilot shut down the aircraft following normal procedures. The droop compensators were being examined by the corporation overseeing the helicopter.