Which type of upkeep is performed between flights?

Turnaround upkeep is specifically designed to be performed between flights, aiming to prepare an aircraft for its next sortie efficiently. This type of maintenance includes essential checks and minor repairs that ensure the aircraft is safe, functional, and ready for immediate operation after its previous mission. It typically involves inspecting critical components, refueling, rearming, and completing any other necessary tasks that can be quickly executed without delaying the aircraft's subsequent takeoff.

The other types of upkeep mentioned have specific contexts and timing associated with them. Special upkeep usually occurs during significant maintenance periods or scheduled inspections, which are not typically conducted between flights. Conditional upkeep is based on specific operational conditions and might not be necessary after every flight, while daily upkeep involves thorough checks that are done at the end of a day's operation, which can be more time-consuming and extensive than what is required in a turnaround situation.