What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Aircraft arriving to isla grande, PR (sig) from st. thomas usvi (stt) on runway 9 abeam to the us custom ramp the helicopter hovered in front of the sig FAA control tower, the PIC privacy data omitted was instructed to side-step to aircraft parking. The PIC hovered from the runway over the grass area in front of the FAA control tower, the helicopter pitched up, then started to turn to the left, rolled on its left side. The main rotor blades impacted the runway, and the helicopter slide across the runway north and stopped just off the runway in front of the FAA control tower. The helicopter main rotor blades damaged, and tail rotor gear box sheared off when it impacted the runway, with structural damage to the airframe. The pilot suffered minor injuries, and the passenger privacy data omitted was seriously injured. PIC also indicated that the tail rotor failed. Acft accident weather San Juan ASOS 800Z observations (taken at 1756Z) 10011KT vis +10 few 032 30/23 A2982, 830Z, 07011KT vis +10 few 032 30/23 A2982 and 700Z observations taken at 1856Z 07013KT vis +10 few 032 30/22 A2982 by sju weather service personnel/privacy data omitted.
As the FAA filed it
(-23) AIRCRAFT ARRIVING TO ISLA GRANDE, PR (SIG) FROM ST. THOMAS USVI (STT) ON RUNWAY 9 ABEAM TO THE US CUSTOM RAMP THE HELICOPTER HOVERED IN FRONT OF THE SIG FAA CONTROL TOWER, THE PIC ^PRIVACY DATA OMITTED^ WAS INSTRUCTED TO SIDE-STEP TO AIRCRAFT PARKING. THE PIC HOVERED FROM THE RUNWAY OVER THE GRASS AREA IN FRONT OF THE FAA CONTROL TOWER, THE HELICOPTER PITCHED UP, THEN STARTED TO TURN TO THE LEFT, ROLLED ON ITS LEFT SIDE. THE MAIN ROTOR BLADES IMPACTED THE RUNWAY, AND THE HELICOPTER SLIDE ACROSS THE RUNWAY NORTH AND STOPPED JUST OFF THE RUNWAY IN FRONT OF THE FAA CONTROL TOWER. THE HELICOPTER MAIN ROTOR BLADES DAMAGED, AND TAIL ROTOR GEAR BOX SHEARED OFF WHEN IT IMPACTED THE RUNWAY, WITH STRUCTURAL DAMAGE TO THE AIRFRAME. THE PILOT SUFFERED MINOR INJURIES, AND THE PASSENGER ^PRIVACY DATA OMITTED^ WAS SERIOUSLY INJURED. PIC ALSO INDICATED THAT THE TAIL ROTOR FAILED. ACFT ACCIDENT WEATHER SAN JUAN ASOS 800Z OBSERVATIONS (TAKEN AT 1756Z) 10011KT VIS +10 FEW 032 30/23 A2982, 830Z, 07011KT VIS +10 FEW 032 30/23 A2982 AND 700Z OBSERVATIONS TAKEN AT 1856Z 07013KT VIS +10 FEW 032 30/22 A2982 BY SJU WEATHER SERVICE PERSONNEL/^PRIVACY DATA OMITTED^.