A Flight Radiotelephone Operator Licence/Certificate only permits you to operate on aeronautical frequencies using radio equipment that is type approved for the aeronautical service.
Aircraft licences - Guidelines | ACMA
If aircraft stations wish to use other than aeronautical or aeronautical-mobile satellite frequencies, a separate licence for the required service is needed. For example, if an aircraft needs to operate on outpost radio then, in addition to the required aircraft licence (or licences), a separate outpost licence is required.
The Amateur Service is an entirely different service and licence, and does not permit operation on other than frequency bands allocated to the amateur service.
Amateur licensing | ACMA