What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
During a simulated power-off autorotation with a power recovery, the instructor and the pilot receiving refresher proficiency training both noted the airspeed was exceeding optimum for main rotor RPM and the main rotor RPM was decaying. At about 200-150 feet, the instructor pilot took the controls, and executed a good flare at about 50 feet. He determined the aircraft was going to fall through and it was not possible to abort the maneuver so close to the runway. He leveled the aircraft and the aircraft hit hard enough to spread the skid gear. The aircraft slid approximately 75 feet down runway 16. It then skid to the left and when the skids struck the dirt on the east side of the runway it caused the aircraft to roll several times before coming to rest on its left side.
As the FAA filed it
DURING A SIMULATED POWER-OFF AUTOROTATION WITH A POWER RECOVERY, THE INSTRUCTOR AND THE PILOT RECEIVING REFRESHER PROFICIENCY TRAINING BOTH NOTED THE AIRSPEED WAS EXCEEDING OPTIMUM FOR MAIN ROTOR RPM AND THE MAIN ROTOR RPM WAS DECAYING. AT ABOUT 200-150 FEET, THE INSTRUCTOR PILOT TOOK THE CONTROLS, AND EXECUTED A GOOD FLARE AT ABOUT 50 FEET. HE DETERMINED THE AIRCRAFT WAS GOING TO FALL THROUGH AND IT WAS NOT POSSIBLE TO ABORT THE MANEUVER SO CLOSE TO THE RUNWAY. HE LEVELED THE AIRCRAFT AND THE AIRCRAFT HIT HARD ENOUGH TO SPREAD THE SKID GEAR. THE AIRCRAFT SLID APPROXIMATELY 75 FEET DOWN RUNWAY 16. IT THEN SKID TO THE LEFT AND WHEN THE SKIDS STRUCK THE DIRT ON THE EAST SIDE OF THE RUNWAY IT CAUSED THE AIRCRAFT TO ROLL SEVERAL TIMES BEFORE COMING TO REST ON ITS LEFT SIDE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.