oldoberon
In response to your questions. No that isn't the pressure bulkhead. That is a firewall separation the APU compartment from the horizontal stabiliser bay. The hose pipe is the APU fuel pipe and the radiator structure is just part of the structure of that sidewall. The area forward of that photo is unpressuried. The photo also shows the APU Fire bottle and the APU bleed duct in the lower left corner. Between that section and HS bay there will be a cutout allowing movement of the HS. The aft portion of the hozizontal stab would sit over the APU tail cone shown in that photo.
Last edited by Islay; 2nd Nov 2015 at 22:00.
Reason: Addition of text