What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) While doing autorotations, the instructor and private pilot receiving remedial training had a low main rotor RPM condition during the flare. The instructor decided to take the helicopter to the ground where the helicopter touched down and the main rotor blade contacted the tail boom severing it just aft of the horizontal fin.
As the FAA filed it
(-23) WHILE DOING AUTOROTATIONS, THE INSTRUCTOR AND PRIVATE PILOT RECEIVING REMEDIAL TRAINING HAD A LOW MAIN ROTOR RPM CONDITION DURING THE FLARE. THE INSTRUCTOR DECIDED TO TAKE THE HELICOPTER TO THE GROUND WHERE THE HELICOPTER TOUCHED DOWN AND THE MAIN ROTOR BLADE CONTACTED THE TAIL BOOM SEVERING IT JUST AFT OF THE HORIZONTAL FIN.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.