| 摘要 |
An aircraft capable of carrying passengers and cargo includes a fuselage (22), having a crown section (164) and a keel (106), a first passenger cabin (120), having a first floor (132), located in a forward portion the fuselage, and a first cargo deck (134), located below at least a portion of the first passenger cabin (120). A split level cabin (35) is located in an aft portion of the fuselage (22), the split level cabin (35) including an upper second cabin (124) having a second floor (156) above the level of the first floor (132), and a lower third cabin (126) beneath the upper second cabin (124) and having a third floor (158) below the level of the first floor (132). A second cargo deck (160) is located in the aft portion of the fuselage and beneath at least a portion of the lower third cabin. The crown section has a substantially constant cross-sectional shape fore-to-aft above the first passenger cabin and the split level cabin, and the keel below the second cargo deck is lowered compared to the keel below the first cargo deck. A modified aircraft having a split level aft cabin and lowered keel, and a method for modifying an aircraft in this way are disclosed. |
