What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) After completing a variety of manuevers on an instructional flight, the instructor directed the student to execute a hovering autorotation. The student did two acceptable iterations. On the third attempt, the student rolled the throttle to idle, failed to compensate for the decrease in torque, and lowered the collective. The aircraft contacted the ground while yawing to the left, bounced, and the instructor attempted to salvage the landing. After the aircraft was firmly on the ground and no damage was visible from inside the cockpit, the instructor added power and made a controllability check at a hover. Everything appeared normal and the instructor elected to continue the training flight. No abnormalities were noted. During preflight for the next flight, damage to the tailboom, as a small deformation at the forward end, was discovered. This was likely caused by forces applied due to the rotation of the aircraft as it made ground contact.
As the FAA filed it
(-23) AFTER COMPLETING A VARIETY OF MANUEVERS ON AN INSTRUCTIONAL FLIGHT, THE INSTRUCTOR DIRECTED THE STUDENT TO EXECUTE A HOVERING AUTOROTATION. THE STUDENT DID TWO ACCEPTABLE ITERATIONS. ON THE THIRD ATTEMPT, THE STUDENT ROLLED THE THROTTLE TO IDLE, FAILED TO COMPENSATE FOR THE DECREASE IN TORQUE, AND LOWERED THE COLLECTIVE. THE AIRCRAFT CONTACTED THE GROUND WHILE YAWING TO THE LEFT, BOUNCED, AND THE INSTRUCTOR ATTEMPTED TO SALVAGE THE LANDING. AFTER THE AIRCRAFT WAS FIRMLY ON THE GROUND AND NO DAMAGE WAS VISIBLE FROM INSIDE THE COCKPIT, THE INSTRUCTOR ADDED POWER AND MADE A CONTROLLABILITY CHECK AT A HOVER. EVERYTHING APPEARED NORMAL AND THE INSTRUCTOR ELECTED TO CONTINUE THE TRAINING FLIGHT. NO ABNORMALITIES WERE NOTED. DURING PREFLIGHT FOR THE NEXT FLIGHT, DAMAGE TO THE TAILBOOM, AS A SMALL DEFORMATION AT THE FORWARD END, WAS DISCOVERED. THIS WAS LIKELY CAUSED BY FORCES APPLIED DUE TO THE ROTATION OF THE AIRCRAFT AS IT MADE GROUND CONTACT.