The loss of the wing-to-body fiberglass fairing is significant, but not compared to the hole in the aluminium skin underneath. Damage by catering trucks is not going to precipitate the type of damage shown here.
A rapid decompression through the hole in the aluminium skin probably blew out the wing to body fairing.
The composite material panels shown here are not designed to retain cabin pressure (it's not a 787).
Please put to rest theories about gas cylinders in passengers bags.... Cylinders big enough to cause this sort of damage would easily be seen by x-ray screening.
I'm putting my money on corrosion (it's the area below the galley) and pressurisation forces. Corrosion inspection oversight?
Note that a lot of panels in the cabin would have popped open as they were designed to do to prevent floors/ceilings collapsing from decompression forces.
Rgds.
NSEU
Agree with most of that, but would a skin failure cause the baggage bins to fail as well ?
I'm not sure about that, I'm of the opinion that something has gone internally.