Aircraft Fuselage With Upper And Lower Deck

Aircraft fuselage, divided by an intermediate floor into an upper deck, preferably constructed as a passenger area, and a lower deck, constructed as a freight area, with a lower floor arranged in the lower deck, below which there is a bilge area, and with a ventilation installation with compressed air ducts through which fresh air can be fed into the upper deck which can be conducted as exhaust air from the upper deck via openings in the intermediate floor, preferably arranged in the area of the fuselage wall, into the lower deck and from there to the outside through one or more discharge valves,

• characterised in that the bilge area (35) is constructed, by suitable sealing against the freight area (30), as a vacuum chamber, which is connected to the freight area (30) solely via flow orifices (32) of small cross-section in the abutment area between the lower floor (31) and the fuselage wall (12).