What Actually Happens to an Airplane Between Flights?

Every minute on the ground costs airlines about $100 — which is why your seatbelt stays unbucked during fueling, someone slides a pole under the tail to keep a 737 from tipping backward, and the captain legally signs off on flying with broken parts. The turnaround isn't a rest period between flights. It's a carefully choreographed stack of simultaneous operations where fuel trucks, bag loaders, and catering lifts converge on the aircraft at once, each following rules designed to prevent the dangers that stacking creates. What looks like a few trucks and a hose is actually a timed sequence born from a desperate 1972 gamble by Southwest Airlines, now replicated at every gate worldwide.