During the accident sequence, the helicopter’s tail rotor and vertical stabiliser assembly separated from the helicopter. The helicopter collided with terrain and was destroyed by impact forces and a post‑impact fire. The pilot was fatally injured.
The ATSB found that "The inherent difficulty in visually detecting powerlines was exacerbated in this case by the outer two supporting power poles being masked by trees. There was also a low-contrast background that included cane fields, rising terrain and a tree-lined creek. In combination, these features negated a number of visual cues normally associated by pilots with the location of powerlines. This increased the difficulty of the pilot seeing the wires, and reduced the time available to take action once the powerline was located."
You can read more at the ATSB website: https://www.atsb.gov.au/publications/investigation_reports/2016/aair/ao-2016-027/
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