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Significant Factors

Summary

  1. The Brisbane sector controller did not ensure separation between two aircraft that were on his radio frequency and in airspace that was under his jurisdiction.
  2. The Brisbane sector controller did not provide a "no restrictions" hand-off to the Darwin controller.
  3. The Darwin approach trainee authorised a level change without ensuring separation.
  4. The introduction of a software change that would have enabled the Darwin trainee to view the relative positions of the aircraft, was scheduled for implementation the day after the occurrence.
 
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