A quick word, if I may, about the possibility of the bolt 'puncturing the fuel tank after one rotation' as asked in #142 + #143. Once again, it might be timely to recall the elapsed time from maintenance and how many cycles since then. If this had happened on a departure and the tank punctured as the slats retracted, it would have emptied in flight and resulted in a rapid diversion but, almost certainly, the tank would have been empty upon arrival. It's a funny old world.
Note quite sure what to make out of this... Yes we can pretty much safely assume that the tank ruptured pretty much at landing or close to it. Still doesn't say much how that bolt managed to get there...