Rigger1, I dont know if you are an industry outsider or not??? so let me tell you something.....all the engineers especially the Licensed ones.....we all know what the thin safety line is.....I am sure there will be millions who will agree with me.....We know when its safe to go and when it isnt.....If you are looking for specifics then I dont think anybody will ever admit it.....We all do it.....having known aircraft inside out....no matter what the commercial pressures are...if its not safe to go.....trust me....nobody will let it go!!!.....I am not trying to make heroes out of engineers.....but I am sure we always have these arguments with the crew about whats safe and whats not safe to go.....as far as Human factors is concerned....I dont think anybody would have let go of an unsafe aircraft under any circumstances....mind you, with every signature on the dotted line people are signing their careers away!!! Good Luck in your search though!!!!