What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot was training a student pilot. They were practicing approaches to a designated area, which consisted of a large gravel mound that was flattened on top, notably, a very uneven terrain.
While in the hover, the pilot reported the helicopter suddenly went into uncontrolled maneuver and pitched up 10-20 degrees, followed by a pitch down of 10-20 degrees. The aircraft then went into a dynamic rollover. Pilot reported the main rotor blades impacted the ground. It rested on its left side, facing north
As the FAA filed it
THE PILOT WAS TRAINING A STUDENT PILOT. THEY WERE PRACTICING APPROACHES TO A DESIGNATED AREA, WHICH CONSISTED OF A LARGE GRAVEL MOUND THAT WAS FLATTENED ON TOP, NOTABLY, A VERY UNEVEN TERRAIN.
WHILE IN THE HOVER, THE PILOT REPORTED THE HELICOPTER SUDDENLY WENT INTO UNCONTROLLED MANEUVER AND PITCHED UP 10-20 DEGREES, FOLLOWED BY A PITCH DOWN OF 10-20 DEGREES. THE AIRCRAFT THEN WENT INTO A DYNAMIC ROLLOVER. PILOT REPORTED THE MAIN ROTOR BLADES IMPACTED THE GROUND. IT RESTED ON ITS LEFT SIDE, FACING NORTH
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.