Robinson Helicopter Co R44 II accident at 46 km north-east of Tenterfield, New South Wales, 13 Mar 2026 (VH-TCF)

Accident narrative

Prior to the flight, the pilot obtained a meteorological location briefing for the Gold Coast, which may have included a graphical area forecast. Although it was reported the pilot expected clear conditions for the flight to Armidale, there were several layers of cloud at Gold Coast Airport forecast at the time the pilot obtained the briefing, and at the time of departure. Further, the area forecast showed that there were likely to be extensive areas of low cloud, with low visibility along the flight path. This did not preclude the pilot from commencing the flight, but it did indicate a high likelihood of encountering conditions unsuitable for flight under the visual flight rules that would require a diversion or landing.The available tracking data showed that the helicopter initially tracked south-west at around 3,000 ft, towards the NSW border. However, as the electronic flight bag software was not set to transmit the flight data, there was no further flight data available. The graphical area forecast and satellite imagery was consistent with witness statements that there was thick cloud and precipitation in the area at the time of the accident. As such, it was very likely that the helicopter entered an area where there was low cloud and/or low visibility in precipitation. While the ATSB could not rule out that the pilot applied a large control input due to avoiding a bird or terrain, it is very likely that without instrument training or an appropriately equipped aircraft, when they encountered low visibility conditions, they became spatially disorientated and applied inappropriate control inputs. Consistent with this, the wreckage examination identified signatures of the main rotor assembly being subject to excessive teeter and mast bumping that resulted in both pitch links failing. Following this, the main rotor blades were free to rotate through various pitch angles, and the helicopter was no longer controllable. The location of the bag and other items from inside the cabin at the accident site was indicative of main rotor contact with the cabin while airborne. In addition, the vertical path through the tree canopy was consistent with a complete loss of control prior to the collision with terrain. While the evidence showed that the engine was operating when the accident occurred, a transient condition such as a partial or complete power loss could not be ruled out, although such an event should not have resulted in a loss of control. Further, there was no evidence to indicate that the pilot became incapacitated prior to the accident sequence due to a pre-existing medical condition.Contributing factorIt was very likely that the pilot entered flight conditions unsuitable for visual flight, resulting in a loss of control and subsequent collision with terrain.