Aviation safety investigations & reports

Hiller UH-12E, VH-XRG, 8 km SE of Beaudesert QLD, 5 February 1984

Investigation number:
Status: Completed
Investigation completed


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At the end of a 180 deg turn the pilot attempted to level out but there was no cyclic response. The helicopter continued in the turn and the application of back cyclic could not prevent the nose dropping. The helicopter struck the bank of a creek shearing off the tail boom, main rotor and gearbox and came to rest in the water. The pilot escaped unhurt and unaided from the partially submerged cockpit. Investigation revealed that a bolt which secured a foot of the cyclic control wobble plate pylon to the transmission gearbox had become detached. Subsequent movement of the pylon deprived the pilot of effective cyclic control. The reason for the loss of the bolt could not be established.

Download Final Report
[Download  PDF: 22KB]
General details
Date: 05 February 1984   Investigation status: Completed  
Time: 920    
Location: 8 km SE of Beaudesert    
State: Queensland    
Release date: 05 March 1985   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Hiller Aviation  
Aircraft model UH-12  
Aircraft registration VH-XRG  
Type of operation Aerial Work  
Damage to aircraft Substantial  
Departure point 8 km SE Beaudesert QLD  
Departure time 0920  
Destination 8 km SE of Beaudesert QLD  
Last update 01 April 2011