.

My paper air planes never had cracks in the wings! So why does one want to fly in a plane that has cracks in the wings and a pilot that does not need to be there, the plane can fly its-self. OK I am getting a little ahead of myself.
   Wow, walking around inside of the wings... walking around in an attic can lead to putting a (crack) in the ceiling below, I am not saying that walking around in a wing may cause...
flying in a cracked plane!