Overview
According to a pilot/operator statement, a private pilot was acting as pilot-in-command (PIC) on an instructional flight. The other occupant was a person whose commercial pilot certificate had been suspended.
Flight Details
The PIC reported that the helicopter had just received an annual inspection and had been refueled prior to takeoff. After bringing the helicopter to a hover, clearance was obtained to cross the active runways to the south side of the airport.
Accident Sequence
Once on the south side, power was reduced for a practice autorotation. The aircrew intended to make a power recovery. However, during the practice autorotation, the engine lost power. Subsequently, the helicopter was extensively damaged during a run-on landing.
Investigation
No part failure or malfunction was found that would have caused a loss of power.