Abstract: A rotary segment aft cargo door for aircraft is geometrically defined by an arcuate slice through the aft fuselage or other nacelle. The door is rotated to an open position, for example and preferably by a cable drive system. The door is suspended by tracks mounted on its inner surface and roller carriages attached to the aft fuselage or nacelle structure. The track and carriage configuration prevents binding as it is a three-point suspension with predetermined clearances in the closed position. Hydraulically actuated interconnected hooks along with lock pins at the pressure door hold the door in the locked position. One-half of the pressure bulkhead is fixed to the aircraft and the other half is carried by the aft cargo door providing automatic pressure door opening with aft cargo door opening. Inflatable pressure seals are used to seal the door in the closed position.