The PBC Linear solution
The proposed solution was to utilize parallel rails using Redi-Rail® and FeatherShaft® products. Redi-Rail was an ideal solution due to its light weight, availability in long lengths, and roller-based technology. The rails were fastened in parallel to support framework, and the sliders were attached to a holding fixture. The APU could then be removed from the aft section of the aircraft, moved via the rails to the maintenance cart for work, and then back to the aircraft when completed. Redi-Rail rollers provided smooth, easy, linear motion under load and the ability to drive manually. Key advantages were the adjustable preload and the rolling element technology that facilitates manual movement of heavy loads.