TAA operated a network of internal services inside Tasmania. The airline bought four Queen Airs for these routes and also for use in Queensland. The economics of a trunk airline operating light aircraft saw TAA and competitor Ansett abandon such routes in favour of third-level airlines formed by air charter operators. -TGA was sold to the Royal Flying Doctor Service.

"Allan Vickers" was the name given to VH-TGA during its time with the Royal Flying Doctor Service. Vickers, a doctor, joined the service in 1931 when it was still a part of the Presbyterian Church.

VH-TGA was part of a fleet of light aircraft contracted to Ansett Air Freight to carry parcels at night. It had its registration revoked in 2006.

Originally N6868Q of Beech Aircraft Corp and delivered to TAA on 9 July 1964. Registered as VH-TGA to the ANAC (t/a TAA) on 14 August 1964. Used on RDFS duties until 1968 and then registered directly to the Royal Flying Doctor Service themselves. It was sold in 1977 to Civil Flying Services. It went to East-West Airlines who operated it on behalf of N.S.W. Department of Health.