But more importantly to me, if you compare that picture, with the above drawing, and then of the pressure bulkhead with the fire bottle, the crashed piece with the fire bottle shows a diagonal cut running top to bottom for front starboard to rear port sides. As if sheared at an angle across the longitudinal axis.
1st I think you mean the firewall not pressure bulkhead, I made that mistake until corrected, working from front it is rear galley, rear pressure bulkhead, unpressurised area for HS stabilser controls, front firewall of next aft sect the apu.
However my reason for replying is to ask for a post number showing what you believe to be a diagonal crack, bear in mind all the pictures showing the firewall and firebottle the section is on its side the actual top is at the left
this is now in the same orientation as the drawing ie top is top
