What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23)The belief of the pilot and his instructor (non-present) is that the pilot flattened the disk too much during acceleration then overly applied back stick causing an excessive angle to the retreating blade causing it to stall and contact the ground.
As the FAA filed it
(-23)THE BELIEF OF THE PILOT AND HIS INSTRUCTOR (NON-PRESENT) IS THAT THE PILOT FLATTENED THE DISK TOO MUCH DURING ACCELERATION THEN OVERLY APPLIED BACK STICK CAUSING AN EXCESSIVE ANGLE TO THE RETREATING BLADE CAUSING IT TO STALL AND CONTACT THE GROUND.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.