How American airlines' maintenance crew preps for holiday travel

0:45 every 90 days an "A" check is performed: inspecting flight controls, flight deck, check call lights, reading lights, repair broken items, sanitize the water, check Wi-Fi, check every USB plug.

2:48 every 10 years the plane is stripped down to the metal frame

https://youtu.be/PPRjWpzvAv4?si=2bm3cO975X_cFx_0