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On 13 April 2005 at approximately 1130 Eastern Standard Time, the pilot of a Robinson Helicopter Company model R22 Beta, registered VH-HXU, was conducting cattle mustering operations near Mareeba, Qld, when he felt a significant airframe vibration and elected to conduct an immediate precautionary landing. Upon inspection with the engine still running, the pilot reported observing the clutch assembly shaking excessively, followed by the sudden fracture of the clutch shaft at the connection to the main rotor gearbox. The pilot was the only occupant of the helicopter and was not injured. There was no other damage to the helicopter.

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General details
Date: 13 April 2005 Investigation status: Completed 
Time: 0930 hours EST  
Location   (show map):Mareeba Investigation type: Occurrence Investigation 
State: Queensland  
Release date: 19 January 2006 Occurrence class: Technical 
Report status: Final Occurrence category: Serious Incident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Robinson Helicopter Co 
Aircraft model: R22 
Aircraft registration: VH-HXU 
Type of operation: Aerial Work 
Sector: Helicopter 
Damage to aircraft: Minor 
Departure point:Mareeba, QLD
Destination:Mareeba, QLD
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Last update 16 February 2016