What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
After deboarding passenger upon landing while conducting operations under 91.147. Pilot was "guarding controls" with the rotorcraft at idle while the other crew member was installing second set of flight controls and aircraft doors an individual approached the rotorcraft, entering under the idling rotor, handed paperwork to the crew. Individual was exiting the area of the rotor system and was struck in the head by a rotor blade. Pilot at the controls then conducted and immediate shut down of the rotorcraft.
As the FAA filed it
AFTER DEBOARDING PASSENGER UPON LANDING WHILE CONDUCTING OPERATIONS UNDER 91.147. PILOT WAS "GUARDING CONTROLS" WITH THE ROTORCRAFT AT IDLE WHILE THE OTHER CREW MEMBER WAS INSTALLING SECOND SET OF FLIGHT CONTROLS AND AIRCRAFT DOORS AN INDIVIDUAL APPROACHED THE ROTORCRAFT, ENTERING UNDER THE IDLING ROTOR, HANDED PAPERWORK TO THE CREW. INDIVIDUAL WAS EXITING THE AREA OF THE ROTOR SYSTEM AND WAS STRUCK IN THE HEAD BY A ROTOR BLADE. PILOT AT THE CONTROLS THEN CONDUCTED AND IMMEDIATE SHUT DOWN OF THE ROTORCRAFT.