20180725017979A

July 25, 2018 N4747H departed kful enroute to kavx at approx 0905 hrs with 3 souls on board, one pilot and 2 los angeles county sheriff deputies. At approximately 0920 hrs the pilot attempted to land at kavx, communicated intentions and obtained weather information from UNICOM and aiport operator. Witnesses state aircraft came in on approach fast and high, pilot elected to go around and attempt landing again. On the second landing attempt aircraft came in high and fast again but pilot was able to get the aircraft on the runway in the last 3rd of the runway. Witnesses state aircraft did not appear to decellerate as would be expected especially after landing long on the runway. As the aircraft was rapidly approaching the end of the runway witnesses state they observed the aircraft engine accellerate and the aircraft pitch up as it departed the end of the runway aircraft then rapidly decended out of view (approximate 200 foot drop off at end of runway) witness which was in the tower at the time dispatched to scene to investigate and was first on the scene and discovered aircraft came to rest on the airport perimeter road. Witness called first responders and assisted souls on the aircraft. All occupants on the aircraft were airlifted to hospital on the mainland due to injuries received in the accident.