It's not taken totally apart, but it is stripped of the interior down to the bare metal, all wiring is checked/replaced as needed. All mechanical parts like the

It's not taken totally apart, but it is stripped of the interior down to the bare metal, all wiring is checked/replaced as needed. All mechanical parts like the flaps and landing gear are removed and checked for wear. The skin is checked for cracks. This is done every 5 years for planes, taking about 5-6 weeks to complete. Here's https://www.youtube.com/watch?v=WLil1MZmchI https://www.youtube.com/watch?v=WLil1MZmchI