What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
At about 1:57 am local time on Thursday, November 22, 2018, after landing at the Hilo International Airport (according to flight aware) following a flight from Alaska, a saab 340 australian registered (vh-zpa) parked behind a Cessna 172 (N116BC) which was tied down and chocked in its assigned parking position. Sometime later, the saab rolled forward about 50 feet and rammed into the tail of N116BC aircraft causing extensive damage. Chocks were not observed being used on the saab by the reporting css officer.
The saab, which was on a ferry flight, continued its flight to samoa.
The aircraft were not occupied by a flight crew or passengers and had no intent to fly.
As the FAA filed it
AT ABOUT 1:57 AM LOCAL TIME ON THURSDAY, NOVEMBER 22, 2018, AFTER LANDING AT THE HILO INTERNATIONAL AIRPORT (ACCORDING TO FLIGHT AWARE) FOLLOWING A FLIGHT FROM ALASKA, A SAAB 340 AUSTRALIAN REGISTERED (VH-ZPA) PARKED BEHIND A CESSNA 172 (N116BC) WHICH WAS TIED DOWN AND CHOCKED IN ITS ASSIGNED PARKING POSITION. SOMETIME LATER, THE SAAB ROLLED FORWARD ABOUT 50 FEET AND RAMMED INTO THE TAIL OF N116BC AIRCRAFT CAUSING EXTENSIVE DAMAGE. CHOCKS WERE NOT OBSERVED BEING USED ON THE SAAB BY THE REPORTING CSS OFFICER.
THE SAAB, WHICH WAS ON A FERRY FLIGHT, CONTINUED ITS FLIGHT TO SAMOA.
THE AIRCRAFT WERE NOT OCCUPIED BY A FLIGHT CREW OR PASSENGERS AND HAD NO INTENT TO FLY.