Somewhile back someone stated that it wasn't 'possible' for a (vertically mounted) oxygen cylinder to break loose.
indicates that the 'missing' cylinder was located 120 (cm?) rearwards of STA700 which can be seen on the left of this photograph:-
Has anyone a
photograph of a cylinder installation from edge-on (or even 'perspective') without the (sidewall) curtains?
illustrates that there is a bracket fixed to the (curved) sidewall to support the cylinder.
Is it possible (even if not
probable) for the oxygen cylinder to fall vertically should the bracket on which it sits break with the result that it falls onto the curved side of the fuselage and sits chafing the external skin weakening the structure (or maybe damages a previous weak patch) which then fails as the pressure outside falls.
In addition, above the 'missing cylinder' location is the door which was claimed to have the 'hole in the floor' (presumably caused by suction during the depressurisation through the hole in the fuselage structure).