What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Shortly after takeoff, the helicopter's engine suddenly increased in speed. At the same time, the helicopter immediately yawed to the left, and lost power and control to both the main rotors and the tail rotor. The helicopter descended rapidly, impacting sloped terrain. After touchdown, the helicopter rolled onto its right side.
As the FAA filed it
SHORTLY AFTER TAKEOFF, THE HELICOPTER'S ENGINE SUDDENLY INCREASED IN SPEED. AT THE SAME TIME, THE HELICOPTER IMMEDIATELY YAWED TO THE LEFT, AND LOST POWER AND CONTROL TO BOTH THE MAIN ROTORS AND THE TAIL ROTOR. THE HELICOPTER DESCENDED RAPIDLY, IMPACTING SLOPED TERRAIN. AFTER TOUCHDOWN, THE HELICOPTER ROLLED ONTO ITS RIGHT 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.