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ATSB: Post-training supervision of powerline stringing pilot ineffective ATSB Press Release | March 9, 2021
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An Australian Transport Safety Bureau (ATSB) investigation into an accident where a Squirrel helicopter struck a powerline pole identified that the operator’s procedures had no requirements to provide any post-training supervision for powerline operations, and that what supervision was provided was ineffective in identifying that the pilot was using a modified stringing method.
While pulling a draw wire with a nose-high and rearward attitude, the helicopter’s main rotor blades struck a power pole about 17 meters above the ground. ATSB Photo
The AS350B3e Squirrel helicopter, registered VH-SZS and operated by Aeropower, was stringing powerlines from the Mount Gunson South substation to the Carrapateena mine site, a total distance of 51 kilometers, approximately 60 kilometers east of Woomera Airfield, South Australia on