What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) On the ground, while in the process of engaging the hydrometrical clutch at approximately 110 rotor RPM, there was a loud bang. The cyclic stick was pulled out of my hand, the helicopter wobbled a few times and rolled over on the port side.
As the FAA filed it
(-23) ON THE GROUND, WHILE IN THE PROCESS OF ENGAGING THE HYDROMETRICAL CLUTCH AT APPROXIMATELY 110 ROTOR RPM, THERE WAS A LOUD BANG. THE CYCLIC STICK WAS PULLED OUT OF MY HAND, THE HELICOPTER WOBBLED A FEW TIMES AND ROLLED OVER ON THE PORT 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.