It appeared to complete a medical evacuation flight and departed back to Brisbane some time later in the evening.
VH-URR was also scheduled to visit Rockhampton Airport but this did not occur.
UPDATE! Late on Thursday 5 April, fellow LifeFlight LearJet 45 bizjet VH-CXJ "Ambulance 452" popped into Mackay Airport also on a medical evacuation flight. It arrived from Brisbane and departed to Townsville some time later in the evening.
Photo taken by The FNQ Skies Blog ©