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The pilot deposited the sling load of delicate instruments on the ground. To avoid dropping the shackle on the load, and because of the proximity of a hangar to the left, he moved the helicopter to the right. The movement, together with type of shackle used and the design of the hook, resulted in the load not being released. Prior to the flight the pilot had not insisted on the fitment of external load observation mirrors. While leaning out of the helicopter to check that the load had been released, he inadvertently caused the helicopter to move further to the right. The resulting tension on the cable connecting the hook and the load induced dynamic rollover. The pilot attempted unsuccessfully to correct the roll and during the subsequent landing the main rotor struck the ground. Use was not made of an available and qualified marshaller.

Download Final Report
[ Download PDF: 22KB]
 
 
 
 
General details
Date: 23 March 1985 Investigation status: Completed 
Time: 1150  
Location:Karratha Investigation type: Occurrence Investigation 
State: Western Australia Occurrence type: Loss of control 
Release date: 29 August 1985 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: Minor 
 
Aircraft details
Aircraft manufacturer: Bell Helicopter Co 
Aircraft model: 206 
Aircraft registration: VH-KXV 
Type of operation: Aerial Work 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Cape Preston WA
Departure time:1150
Destination:Karratha WA
 
 
 
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