A guide assembly (30a, 30b) for guiding cargo load pallets onto a cargo deck of a cargo aircraft, the guide assembly comprising: a support subassembly (40a, 40b) having surface flanges (40a-1, 40b-1) for being fixed to the cargo deck, said support subassembly comprising a recessed housing box recessed below the surface flanges (40a-1, 40b-1) and having a latch pin retained within apertures of a support bracket pair (44-1, 44-2); a moveable subassembly (60a, 60b) for encountering a cargo load pallet and receivable within the recessed housing box, the moveable subassembly (60a, 60b) comprising a hinge assembly (34a, 34b) providing a hinged connection, having a hinge axis, to the support subassembly (40a, 40b) along an exterior lateral edge so as to be pivotally moveable relative thereto; and an actuator assembly and the support subassembly (40a, 40b) allowing the moveable subassembly (60a, 60b) to be pivotally moveable between a releasably locked stowed condition and a releasably locked deployed condition, wherein the actuator assembly comprises: (i) a splined shaft rotationally connected to a frame component of the moveable subassembly (60a, 60b) parallel to said hinge axis; and (ii) a latch lever and a hook element (86a, 86b) each connected to the splined shaft for pivotal movement therewith; wherein the moveable subassembly (60a, 60b) comprises a moveable operation handle having a distal end that is releasably engaged with the latch lever when the moveable subassembly (60a, 60b) is in the stowed condition, and wherein pivotal movement of the operation handle about an axis parallel to the hinge axis disengages the distal end thereof with the latch lever to allow the frame component to pivotally move from the stowed condition to the deployed condition, and wherein the hook element (86a, 86b) engages the latch pin when the frame component pivotally moves from the stowed condition to the deployed condition so as to establish the releasably locked deployed condition. a support subassembly (40a, 40b) having surface flanges (40a-1, 40b-1) for being fixed to the cargo deck, said support subassembly comprising a recessed housing box recessed below the surface flanges (40a-1, 40b-1) and having a latch pin retained within apertures of a support bracket pair (44-1, 44-2); a moveable subassembly (60a, 60b) for encountering a cargo load pallet and receivable within the recessed housing box, the moveable subassembly (60a, 60b) comprising a hinge assembly (34a, 34b) providing a hinged connection, having a hinge axis, to the support subassembly (40a, 40b) along an exterior lateral edge so as to be pivotally moveable relative thereto; and an actuator assembly and the support subassembly (40a, 40b) allowing the moveable subassembly (60a, 60b) to be pivotally moveable between a releasably locked stowed condition and a releasably locked deployed condition, wherein the actuator assembly comprises: (i) a splined shaft rotationally connected to a frame component of the moveable subassembly (60a, 60b) parallel to said hinge axis; and (ii) a latch lever and a hook element (86a, 86b) each connected to the splined shaft for pivotal movement therewith; wherein (i) a splined shaft rotationally connected to a frame component of the moveable subassembly (60a, 60b) parallel to said hinge axis; and (ii) a latch lever and a hook element (86a, 86b) each connected to the splined shaft for pivotal movement therewith; wherein the moveable subassembly (60a, 60b) comprises a moveable operation handle having a distal end that is releasably engaged with the latch lever when the moveable subassembly (60a, 60b) is in the stowed condition, and wherein pivotal movement of the operation handle about an axis parallel to the hinge axis disengages the distal end thereof with the latch lever to allow the frame component to pivotally move from the stowed condition to the deployed condition, and wherein the hook element (86a, 86b) engages the latch pin when the frame component pivotally moves from the stowed condition to the deployed condition so as to establish the releasably locked deployed condition.