How difficult is it to change a flat tire on a Boeing 747?
It depends on your skill level for one. Let's say that you can replace a tire on a car within 30 minutes to 1 hour from the moment you open the trunk to get the replacement, to put the wrong tire. All you need is a good tire, jack, tire, hook wrench and wheel chocks.
This is what you need for a flat tire replacement. 2 mechanics, dangerous for 1 person, 2 tires (with a flat you must also replace the opposite tire on the same axle), tire trolley, 60 to 80 ton intake, access to compressed air for digging tires, torque wrench, nut bushing spindle, ratchet and / or wrench, thread cutter, safety wire pliers, torque wrench, axle grease and rags. All preparation takes a lot of time, not to mention the paperwork required (copy of the maintenance procedure, recording the recorded mismatch (puncture) and canceling the maintenance of the aircraft (plane not allowed to fly until it stops). that the mechanic releases it to the pilot I would say 1 1/2 to 2 ½ hours on average if nothing happens in an unpredictable way.
Video credits to Airplane Group YouTube channel