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The helicopter was hovering about 30 feet over a swamp when the pilot heard a noise and the helicopter began to vibrate. The pilot flew the helicopter towards dry land but it began to rotate around the main rotor mast. A tail rotor failure procedure was carried out and the machine landed in the water. The helicopter suffered damage to the tailboom, drive shaft, uprights and cross tubes. Subsequent examination revealed that the tailrotor extension shaft drive pin had failed at the tailrotor gearbox.
Download Final Report
[ Download PDF: 11KB]
General details
Date: 20 February 1993 Investigation status: Completed 
Time: 8:00 CST  
 Investigation type: Occurrence Investigation 
 Occurrence type: Forced/precautionary landing 
Release date: 11 March 1994  
Report status: Final Occurrence category: Accident 
Aircraft details
Aircraft manufacturer: Bell Helicopter Co 
Aircraft model: 47G-3B1 
Aircraft registration: VH-JWI 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Woolner Station NT
Destination:Woolner Station NT
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Last update 23 July 2015