Originally Posted by Almostfamous View Post
I came across this photo, might fill in the missing "extreme end" question posed.
D) pure interest what is the domestic radiator type structure
That 'radiator' type structure is one of the 2 Horizontal Stab Bay access doors.
The interesting thing is that its designed to be a blowout panel in the event of Rear Pressure Bulkhead blowout. This door is still firmly in the closed position. This indicates that there has not been a significant dump of cabin pressure into the H/S Bay.