Abstract: Referring to FIG. 2, disclosed is an aircraft compound no-back/offset gearbox (2) with an integral load proportional safety (no-back) brake (50). The four gears are all 16 diametral pitch, involute external spur gears with 20 degree standard pressure angles. The two gear stages are interconnected with a mechanical fuse or shearout (40) designed to fail under excess shear loads and protect components downstream of the input shaft (10) from excess torque in the event of a system jam. The shearout (40) is essentially a quill shaft with external splines at both ends and an hourglass-shaped shear neckdown in the middle. The purpose of the no-back brake (50) is to prevent air loads from causing slat movement in the event of a torque tube disconnect. Referring to Figure, the no-back consists of a set of ball ramp (22) and brake plate components connected to the gearbox's output shaft.

Abstract: A floor mounted power drive unit for moving containerized cargo or pallets within a cargo airplane; and the cargo drive unit generally comprises, a rotatable wheel or roller which is both steerable and retractable, and which is of modular construction for ease of insertion into a mounting opening in the floor of the cargo compartment with the only interface being a torque reaction means and an electrical connection.

Abstract: A pivotal crank is positioned with respect to the output cam of a torque limiter such that upon torque limiter operation the resulting translation of the cam pivots the crank. Attached to the crank is a flag arm which is normally retained by a spring clip. Pivotal motion of the crank causes disengagement of the flag arm from the spring clip thereby indicating torque limiter operation. The flag arm remains in the disengaged position, despite subsequent absence of limiter operation, until it is manually reset.

Abstract: A pivotably mounted door stop linkage has a resilient member acting on the linkage to maintain the door stop in position for conventional door operation while allowing rotation of the stop to release the door in reaction to a pressure differential acting across the door.