What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot, while conducting aerial applications, heard a "loud pop" and noted that the main rotor RPM was beginning to decay. He then attempted to autorotate the aircraft to a landing. The subsequent landing resulted in substantial damage to the aircraft. The pilot was not injured.
As the FAA filed it
THE PILOT, WHILE CONDUCTING AERIAL APPLICATIONS, HEARD A "LOUD POP" AND NOTED THAT THE MAIN ROTOR RPM WAS BEGINNING TO DECAY. HE THEN ATTEMPTED TO AUTOROTATE THE AIRCRAFT TO A LANDING. THE SUBSEQUENT LANDING RESULTED IN SUBSTANTIAL DAMAGE TO THE AIRCRAFT. THE PILOT WAS NOT INJURED.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.