An aircraft loader (54) includes an upper loading platform (50) and an underlying frame (52) with the frame utilizing the bogey suspension system (60), as well as carrying auxiliary lift system (400) at the rearward end thereof for assisting in the initial lifting of the platform relative to the frame. Powered roller assemblies (100,110,120, and 130), composed of hollow drive shafts, may be conveniently assembled and disassembled from the underside of loading platform (50). A plurality of upwardly convex-shaped static slider elements (200) facilitate unidirectional movement of loads on the platform (50). At the forward end of the platform, a guard or side rail (316) is rotatable from a retracted position within the confines of a control platform (68) to a forwardly directed position toward the fuselage of the aircraft. The side rail (316) is shaped to resemble the exterior cross-sectional shape of the fuselage, thereby to close the gap between the forward end of the loading platform and the fuselage, for the protection of loader personnel.