The position depends on the aircraft and the weapon/store requirements. For ease of removal and installation, the ejector assembly is secured in the bomb rack by a quick-release LOK pin assembly. The release piston (fig. 10-18) is operated by gas pressure. It is used to actuate the mechanical release linkage during cartridge ejection, and to unlock the suspension hooks. A properly installed safety pin assembly safes the bomb ejector rack mechanically by blocking the mechanical release linkage. Although the safety flag assembly does not safe the rack electrically, it does prevent ejection of loaded weapons/stores if the cartridges are accidently fired. When the safety flag assembly is inserted in the bomb rack, the safety pin depresses the relief linkage assembly. The relief linkage assembly then depresses one of the two breech relief valves (fig. 10-17) to vent gases if a cartridge is accidently fired. The relief linkage assembly is arranged so that one of the breech relief valves is depressed regardless of which position the ejector assembly is actually installed in the bomb rack. The BRU-10A/B bomb ejector rack has an auxiliary release unit assembly. It provides an emergency method of release if the ejector assembly or its electrical system should fail. The BRU-10A/B bomb ejector rack auxiliary release unit assembly (fig. 10-18) consists of a pressure control nut, exhaust tube, release piston, breech cap, and a breech cylinder. When the separation cartridge is fired, the expanding gases supply the force to actuate the release piston. The release piston extends to actuate the mechanical release assembly, releasing the suspension hooks. The suspension hooks release the weapon/store. The auxiliary release unit assembly does not eject the weapon/store. If a cartridge in the auxiliary release unit assembly is accidentally fired, the installed safety flag assembly prevents movement of the mechanical release mechanism assembly. The gas pressure generated by the ignition of the cartridge vents to the atmosphere through an exhaust tube on the auxiliary release unit assembly. Organizational-level maintenance is limited to cleaning, replacing, and corrosion control of damaged parts and assemblies that can be replaced without removal of the bomb rack from the aircraft. If a BRU-10A/B bomb ejector rack requires inspection or repair beyond the scope of the organizational maintenance level, route the bomb rack to the intermediate or depot maintenance level. A few of the routine maintenance requirements are discussed in the following paragraphs. After every five firings or at the end of the day’s operation, whichever occurs first, the ejector assembly must be removed from the bomb ejector rack for cleaning and inspection. The actual cleaning and inspection requirements are the same as for the bomb ejector racks previously discussed. After the ejector assembly has been disassembled, cleaned, and inspected, you should lubricate the parts with a thin coat of MIL-L-19701 lubricant prior to reassembly. BRU-11A/A Bomb Ejector Rack The BRU-11A/A bomb ejector rack is a modification of the BRU-10A/B bomb ejector rack. The BRU-11A/A is used on the wing stations of the S-3 aircraft. However, it doesn’t operate in exactly the same way. The major difference between the two bomb ejector racks is that the BRU-11A/A is equipped with an IFOBRL. This mechanism consists of a remote- controlled bomb rack lock and a remote-controlled emergency release for the bomb rack lock. This allows the bomb rack to be locked by the use of a remote-controlled actuator during loading and during flight. This eliminates the need for the safety pin assembly used on the BRU-10A/B. There are several different models of the BRU-10A/B and the BRU-11A/A bomb ejector racks currently in use. Part numbers are assigned to identify the various models of configured bomb racks and are used during maintenance. Figure 10-18.—BRU-10A/B bomb ejector rack auxiliary release unit assembly. If you need more information about the BRU-10A/B and the BRU-11A/A bomb ejector racks, refer to Bomb Ejector Rack BRU-11A/A, NAVAIR 11-10C-24. 10-14