Initially the two airlines used separate airline codes. In 1983, Sunstate changed its code to that of Noosa Air, and by the end of the year, the two airlines had merged fully. From 1 January 1984, all flights were conducted under the Sunstate name as part of TAA's Queensland network. The diverse, combined fleet consisted of two Islanders, two Bandeirantes, three de Havilland Canada DHC-6 Twin Otters and a Short 330. Within a few months, the Islanders and the Short 330 were replaced by a GAF N.24A Nomad and a Short 360, with the Islanders going to associated company Whitaker Air Services.