Incident Overview
A flight instructor and a student pilot were practicing hovering autorotations in a helicopter. The student successfully completed two hovering autorotations from a height of 2 inches. The instructor then directed the student to bring the helicopter to a 1-foot hover.
Maneuver and Loss of Control
As the student initiated the maneuver from the 1-foot hover, he applied full right pedal and began to roll the throttle on. This action immediately resulted in a substantial right yaw. The flight instructor corrected by adding left pedal, rolling the throttle off, and lowering the collective. These corrective actions overcorrected for the right yaw, causing a left yaw.
Touchdown and Damage
As the skids touched the ground, the flight instructor fully lowered the collective. The helicopter sustained damage: the aft cross tube was bent, and the tail boom was wrinkled.
Conclusion
The flight instructor reported the sequence of events leading to the accident. No further causal factors were identified in the report.