Abstract: Actuating mechanisms (39, 40, 44) for an aircraft door (34) mounted along its upper edge to the body (36) of an aircraft (25) for movement into and out of a door opening (35) in the fuselage (29). The hinge actuating mechanisms (39) include a drive unit (46) and linkage assembly (50, 51) secured to the body (36) with all actuating components (45, 46, 48-51) mounted on the door (34) and positioned so that all actuating components move outwardly and upwardly to points outboard of an above the opening (35) except for actuating links (51) which pass through the upper corners of opening (35), thus defining an esentially unobstructed clearance area for passage of cargo. The latch cam assembly (40) employs a single actuator (90) for pulling door (34) to a fully closed position and for latching/unlatching a plurality of bottom latches (99, 100) and a pair of mid-span latches (42, 109).

Abstract: The system includes two parallel rails, multiple airdrop/logistics locks mounted by one rail, and multiple forward restraint mechanisms mounted by the other rail opposite alternate airdrop/logistics locks. Two drawbars are connected to and provide remote operation of the airdrop/logistics locks and the forward restraint mechanisms, respectively. The airdrop/logistics locks additionally are operable locally. Each airdrop/logistics lock includes a movable detent and a force responsive release assembly which releases the detent from an extended locking position upon attainment of a predetermined threshold force in the aft direction. The release assembly includes a fuse and a contractible cartridge assembly connected to the detent such that movement of the detent toward a release position will cause the cartridge to contact.

Abstract: A ramp door hinged along the forward edge of a cargo door opening in the fuselage of an aircraft is retained in a locked position until the abutting end of a cargo door is pivoted into the aircraft about a hinge along the aft edge of the opening. Cylindrical pins extend from brackets on the fuselage at spaced-apart locations along each side of the ramp door opening. The pins pass into eyelet openings in spaced-apart upstanding hanger members supported by the ramp door. The hinge for the ramp door includes crank arms coupled with a hydraulic actuator used to move the ramp door with a translating motion in an aft direction to disengage the hanger members from the support pins. This translating movement of the ramp door is required as an initial measure for lowering the ramp door but inhibited so long as the cargo door remains in a closed position.

Abstract: An aircraft ramp assembly for loading and unloading of cargo includes a ramp door with a toe ramp hinged thereto. The toe ramp includes a forward toe leaf and an aft toe leaf, the forward toe leaf being coupled by a hinge along one edge to the ramp door and coupled by a hinge along the opposite edge to the aft toe leaf. An actuator supported by the ramp door moves the toe ramp from a stowed position into a position wherein at least the forward toe leaf defines an extension to the ramp door. A selectively coupled linkage including a push rod responds to movement by the forward toe leaf to position the aft toe leaf into one of three positions. In the first position, the aft toe leaf is stored in an underlying relation beneath the forward toe leaf. In the second position, the aft toe leaf engages the ramp door to form a truss support for the forward toe leaf. In the third position, the aft toe leaf forms an extension to the forward toe leaf.