Aviation safety investigations & reports

Bell Helicopter Co 206, VH-BKG, 25 km SW Yulara NT, 7 June 1990

Investigation number:
Status: Completed
Investigation completed


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The pilot was tasked to lift bundles of steel rods about 100 metres to the top of a small knoll. He briefed a fellow fixed wing pilot on hooking procedures and, as no lifting devices were available at Yalara, instructed him to wrap the load's chain twice around the hook to form a loop and prevent the load from slipping. The accident occurred on the second flight to the knoll. As the helicopter began to move forward, a partial power failure was experienced. The front of the load then dug into the ground and the rear swung up until it struck the tail rotor. The helicopter began to rotate to the left followed by a left roll. The pilot rapidly applied full right cyclic to level the helicopter before it struck the ground. During the sequence, the pilot attempted to release the load three or four times using the electric release button. He then reached for the manual release handle but was unable to operate it before the helicopter struck the ground. The helicopter had a history of recent, unreported engine chip detector warning light illuminations which included at least one precautionary landing. It also had a history of high engine oil consumption which was supported by the high level of sooting on the exhaust stacks. The absence of engine oil in the oil tank and the pilot's reported grinding feeling through the airframe indicate a malfunction with the engine. A specific reason for the power failure could not be determined, although the fuel system was found to be in a very poor condition and a section of the drive spline for the power turbine governor was missing.

Download Final Report
[Download  PDF: 23KB]
General details
Date: 07 June 1990   Investigation status: Completed  
Time: 850    
Location   (show map): 25 km SW Yulara    
State: Northern Territory    
Release date: 17 June 1991   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Bell Helicopter Co  
Aircraft model 206  
Aircraft registration VH-BKG  
Serial number 3129  
Type of operation Aerial Work  
Sector Helicopter  
Damage to aircraft Substantial  
Departure point 25 km Sw Yulara NT  
Departure time N/A  
Destination 25 km SW Yulara NT