Airborne collision involving Piper PA28-151, VH-JGG and Piper PA28-181, VH-DAF, Mudgee, New South Wales, on 12 April 1991
Collision with terrain involving Piper PA-30, VH-MCO, Fitzroy Falls, New South Wales, on 10 March 1991
Collision with terrain involving Bell 206L-1, VH-TCH, South Stradbroke Island, Queensland, on 3 March 1991
Collision with terrain involving Bell 47-G5A, VH-NAG, 10 km south of Lawn Hill (240 km north-north-west of Mount Isa), Queensland, on 2 March 1991
Breakdown of co-ordination involving Boeing 737-377, VH-CZG and Boeing 737-376, VH-TJD, Mount Isa, Queensland, on 1 March 1991
Kawasaki Bell 47, VH-JKX, Red Bank Mine (30 km west-north-west of Wollogorang), Northern Territory, on 17 February 1991
Total power loss involving an Aero Commander 681, VH-NYG, Tamworth, New South Wales, on 14 February 1991