What happened
During an instructional flight, a rotorcraft-rated private pilot was conducting maneuvers while the helicopter was hovering. The pilot initiated a clearing pedal turn to the right. Approximately a quarter turn into the maneuver, the helicopter yawed violently to the right and crashed before the flight instructor could intervene.
The investigation
Examination of the helicopter revealed no mechanical anomalies that would have contributed to the accident. Notably, the flight instructor had been involved in a similar accident with the same helicopter but a different student approximately one month earlier.