They landed in Casino at 2.06pm but took off from there almost an hour later. About 3.15pm, the aircraft "commenced a series of rapid descents and climbs followed by a descending left turn", the ATSB said. "The turn and descent continued until (the aircraft) collided with terrain," the report said. "The pilot and passenger were fatally injured, and the aircraft was destroyed." The aircraft impacted a ridge line within Tooloom National Park near the Queensland border. "The ATSB found that the pilot, who was operating under visual flight rules, departed Casino with a high risk of encountering forecast cloud," ATSB director of transport safety Stuart Macleod said.