speaking from my profession, working for the department of Defense, in the weapons research department, I can say that I am missing one piece of obvious evidence to indicate one reason:
I see no evidence of any shrapnel holes, charring, blackening, blast damage to the baggage and so on.
Even if a pressurised container of some sort ( such as oxygen bottles, aerosol cans etc.) were to fail, it must have left some blast damage and expelled some shrapnel.
AFAIK IMHO it points to either corrosion or puncture of the pressurised skin, to have caused this damage.
But, this just my opinion, based on a few pictures on the telly and on the web. Closer inspection of the damage IRL will show more details. Lets just for the local experts.
cheers.
PS: of course, excellent flying and performance of the crew, hats off!
