The manoeuvre took place as the Australian and US Air Forces conducted refuelling trials during March and April at Eglin Air Force Base, in Florida, and Base Edwards, in California.
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A preliminary report by the safety investigator has revealed a fracturing of the pitch change control sleeve likely led the helicopter to yaw – or spin on its vertical axis – before crashing and repeatedly rolling on the ground.
The manoeuvre took place as the Australian and US Air Forces conducted refuelling trials during March and April at Eglin Air Force Base, in Florida, and Base Edwards, in California.