Air/pressurisation involving a Schweizer Aircraft Corp 269C, VH-CRY, 25km NW Proserpine, QLD on 12 January 1994

The helicopter was hovering out of ground effect at about 15 m above ground level, with a right crosswind at 8-15 kt. As the pilot applied right pedal to turn more into wind, he felt a vibration and the helicopter commenced to rotate to the right. The pilot applied left pedal, moved the cyclic control forward, and lowered the collective pitch control in an attempt to recover the situation but the helicopter continued to rotate as it descended. After three or four rotations, the main rotor blades struck saplings and the pilot elected to land the helicopter. During the landing, the tail boom and then the main rotor contacted a log, resulting in substantial damage to the helicopter.