03/13/2013 01:17 pm ET

Southwest Airlines Video Shows Jet Engine Mechanics At Work (VIDEO)

Ever wonder what goes into jet engine maintenance?

A new video from Southwest Airlines has at least some of the answers; it shows just how much work goes into swapping out engines on one of the airline's many 737 aircraft.

The clip, which first appeared on the carrier's fun Nuts about Southwest blog, demonstrates the complicated task that happens, on average, every two days across the fleet:

During an engine change, the engine is removed entirely from the aircraft and replaced with another engine. The process can take as few as four and as many as seven hours to complete. Teamwork is crucial; everyone has a job. ...

An engine change is an extremely controlled procedure that requires not only skill, but a strict compliance with complex federal regulation. In the past year alone, Southwest [employees] performed 154 engine changes -- excluding aircraft retirements.

H/t Terry Maxon, The Dallas Morning News