Comment Re:How much of the it is 25yrs old? (Score 4, Interesting) 125
I've actually been inside the Atlantis. I was lucky enough to receive the VIP tour. I'm gonna glow your mind. The technicians there say *every inch* of wire is removed and closely examined after every launch. So yea, I would agree with OP, the shuttle basically gets gutted after launch. How much is replaced after each inspection I can't say.
Fun fact: the shuttle bay doors are only designed to be opened in space. If opened on earth their own weight would rip the hinges apart. During inspection the doors are supported by huge braces.
Oblig Picture:
http://imgur.com/7pBjO.jpg