During the afternoon on Sunday 21 July, LifeFlight (Aeromed) LearJet 45 bizjet VH-CXJ "Ambulance 452" was noted arriving into Mackay Airport. It looked to touch down from Townsville, Cairns and Brisbane.
After a short while on the ground, it departed to Townsville.
UPDATE! On Monday 22 July, VH-CXJ "Ambulance 452" was back in CQ and back at Mackay Airport, arriving from Townsville and Cairns before later departing to Brisbane.