Runway incursion involving a Cessna 172M, VH-MGZ and Cessna 172RG, VH-CSH, Canberra Airport, Australian Capital Territory, on 11 April 1999
ACAS warning involving a Boeing 767-277, VH-RMH and Boeing 737-476, VH-TJQ, 15 km north-north-west of Sydney Aerodrome, New South Wales, on 6 April 1999
Collision with terrain involving a Cessna 402C, VH-UBB, Gove Aerodrome, Northern Territory, on 5 April 1999
Airspace incursion involving a McDonnell Douglas F/A-18A, 370 km north-north-west of Perth Airport, Western Australia, on 28 March 1999