What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot reported that the helicopter started to vibrate and shudder. He lowered the collective to slow the helicopter down and the engine quit. He entered an autorotation and deployed the floats. When he tried to decelerate the helicopter for an autorotative landing. He could not move the controls. The helicopter hit the water hard and broke apart.
As the FAA filed it
(-23) PILOT REPORTED THAT THE HELICOPTER STARTED TO VIBRATE AND SHUDDER. HE LOWERED THE COLLECTIVE TO SLOW THE HELICOPTER DOWN AND THE ENGINE QUIT. HE ENTERED AN AUTOROTATION AND DEPLOYED THE FLOATS. WHEN HE TRIED TO DECELERATE THE HELICOPTER FOR AN AUTOROTATIVE LANDING. HE COULD NOT MOVE THE CONTROLS. THE HELICOPTER HIT THE WATER HARD AND BROKE APART.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.