In another thread it was mentioned that a ping test on rivets would be performed. If they didn't sound right they would be replaced. My question is...was there a quality assurance team that actually inspected all the rivets or just ones that didn't look right? From all I've read and seen I think its pretty much accepted that the hull plates buckled and came apart at the seems from rivets popping. I've also read the initial damage open to the sea was about the size of standard household door. Of course as time went by and she sank deeper more openings were exposed to the water. Know this has been covered before but its still interesting.