| 摘要 |
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.
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