Bell 47-G2, VH-KHK, Emu Park (approx 65 km W Hay) NSW, 17 September 1987

The helicopter was engaged in the mustering of feral pigs for a cull. After descending the helicopter to follow the pigs into a cleared area, the pilot noticed that more power was required to fly the aircraft. The aircraft was immediately returned to base and landed, where an inspection revealed damage to the leading edge of both rotor blades. The damage was consistent with the blades striking small branches of trees. The pilot reported that neither he nor his passenger had been aware of the helicopter striking any objects.