Rejected take-off involving a Robinson Helicopter Co R22, VH-HBC, 15km NE Hodgson River, NT on 4 March 1994

After landing the helicopter in a confined area the pilot had some reservations about its ability to climb over adjacent trees. He identifed an area that appeared suitable for a run-on landing in the event of the need to reject the takeoff. After commencing the takeoff the pilot realised that there was insufficient power available to clear the trees and manoeuvred the helicopter for a run-on landing in the area he had previously identified. During the ground run, just before the helicopter came to a stop, the ground gave way into an underground cavity. The helicopter pitched forward and the main rotor struck the ground.