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During takeoff, the pilot inadvertently allowed the engine/rotor rpm to decay. By the time he realised his predicament, the main rotor was overpitched and the helicopter slowly settled back towards the ground. With a loss of tail rotor thrust due to the overpitching, the pilot was unable to avoid the body of the helicopter rotating through 270 degrees. During the rotation, the tail rotor and main rotor struck a small tree. The helicopter landed heavily, spreading the landing gear skids.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 24 January 1991 Investigation status: Completed 
Time: 1800  
Location   (show map):Mt Christian (30 km South of Sarina) Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Loss of control 
Release date: 04 April 1991 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Hiller Aviation 
Aircraft model: UH-12 
Aircraft registration: VH-HMT 
Serial number: HA3066 
Type of operation: Business 
Damage to aircraft: Substantial 
Departure point:Mt Christian QLD
Departure time:N/A
Destination:Greenmount QLD
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Last update 13 May 2014