What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The pilot in command stated that while conducting a 180 degree autorotation, at about 100 feet above the ground and indicating 70 knots, he felt a sudden increase in their rate of descent. At that point he called for a go-around and assisted on the controls by adding throttle. The helicopter did not respond to the corrective action and impacted the ground in a level attitude causing substantial damage.
As the FAA filed it
(-23) THE PILOT IN COMMAND STATED THAT WHILE CONDUCTING A 180 DEGREE AUTOROTATION, AT ABOUT 100 FEET ABOVE THE GROUND AND INDICATING 70 KNOTS, HE FELT A SUDDEN INCREASE IN THEIR RATE OF DESCENT. AT THAT POINT HE CALLED FOR A GO-AROUND AND ASSISTED ON THE CONTROLS BY ADDING THROTTLE. THE HELICOPTER DID NOT RESPOND TO THE CORRECTIVE ACTION AND IMPACTED THE GROUND IN A LEVEL ATTITUDE CAUSING SUBSTANTIAL DAMAGE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.