Air-ground-air involving a Beech Aircraft Corp 76, VH-AZX and British Aerospace PLC BAe 146-200, VH-NJU, Mackay Aerodrome, Queensland, on 28 April 1998
Loss of separation involving a Piper PA-23-250, VH-JSB and Piper PA-31-350, VH-OZV and Piper PA-31-350, VH-IAM, 12 km south-east of Launceston VOR, Tasmania, on 21 April 1998