Dan Webster, the man bringing the Grumman G-111T back, has said he "won't' stop" just at the first remodelled variant, and is ready to future-proof the next-generation flying boat.

Travellers have taken to social media to show photos of snaking queues. However, most flights at Sydney airport, the worst affected, have departed on time or with a short delay.

The outgoing Hupfeld transferred command of the RAAF to his replacement, Air Marshal Robert Chipman, at a ceremony in Canberra.

The organisation's target is to have a fully functioning air taxi system in place in the Queensland capital ahead of the 2032 Brisbane Olympic Games.