Operational event involving a Cessna Aircraft Company T210N, VH-KTM, SERPENTINE , WA on 16 December 1992

Whilst conducting pilot training for Search and Rescue helibox dropping, the helibox hit the tail of the leading edge of the horizontal stabiliser. The heliboxes were being dropped out of the front passenger window of the aircraft. The drop was the last for the day and there had been no problems experienced in the previous drops. Turbulence in the area had built up during the day and was causing slight airspeed and altitude fluctuations. CAA manuals recognise that turbulence can cause an increased risk of tailstrike in this type of operation and advise to exercise caution when turbulence is present.