Aviation safety investigations & reports

Robinson R22, VH-IXM, Archerfield QLD, 18 August 1984

Investigation number:
Status: Completed
Investigation completed


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As the helicopter was being hovered the pilots heard a muffled bang. The instructor immediately assumed control and landed the helicopter. An inspection of the transmission area revealed that the rear drive belt was missing. The instructor reboarded the helicopter and commenced to hover taxi back to the hangar. Another bang and other noises were heard emanating from the rear of the helicopter, which was landed and the engine shut down. Substantial damage had been caused to the transmission area. The reason for the initial belt failure was not determine as the belt was not recovered. The remaining belts failed after being overloaded during taxi back to the hangar. It is considered that after the belts failed the actuator continued to run winding itself apart. This resulted in the gross misalignment of the driveshaft and in turn the failure of the flexplate and the damage to the transmission area.

Download Final Report
[Download  PDF: 22KB]
General details
Date: 18 August 1984   Investigation status: Completed  
Time: N/A    
Location: Archerfield    
State: Queensland    
Release date: 16 February 1987   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Robinson Helicopter Co  
Aircraft model R22  
Aircraft registration VH-IXM  
Type of operation Flying Training  
Sector Helicopter  
Damage to aircraft Substantial  
Departure point Archerfield QLD  
Departure time N/A  
Destination Archerfield QLD  
Last update 01 April 2011