Incident Overview
A student pilot and instructor pilot were conducting a hovering exercise in a helicopter. The maneuver involved a 180-degree pedal turn to the right. According to the instructor pilot, after the helicopter had rotated 90 degrees, the rate of turn began to increase. The student applied left pedal input to slow the turn.
Sequence of Events
The instructor pilot observed that the engine RPM had dropped below the normal operating range. The instructor then assumed control of the helicopter. He increased RPM and added left pedal, but the helicopter continued to turn to the right. Unable to regain control of the turn, the instructor initiated a hovering autorotation.
Final Outcome
During touchdown following the hovering autorotation, the helicopter rolled over. The official report did not specify any injuries, damage, or subsequent actions such as medical examinations or aircraft disposition.