and international military aviation customers. Test & Training Systems AAI's test systems are used by every branch of the U.S. military. The Joint Systems Electronic Combat Systems Tester is part of the DoD's family of testers and currently supports flight-line electronic warfare testing for several U.S. military aircraft. The company's Advanced Boresight Equipment systems are used to align avionics and weapons systems onboard military aircraft and helicopters. AAI also produces radar simulators that simulate varied threat signals to test the functionality of radar warning receivers and cockpit displays and controls. AAI acquired ESL Defence Limited in 2005. Based in the UK, ESL designs and manufactures electro-optical, infrared, and ultraviolet test and simulation/stimulation products for use on flight lines, in aircraft maintenance facilities, and at military test and evaluation ranges. AAI also provides functional automated test equipment for satellite, electronic and other systems. Training Systems AAI has capabilities in the design, production, and sustainment of maintenance training devices such as the C-17 Globemaster, the F-22 Raptor, and most recently, the F-35 Lightning II Joint Strike Fighter. AAI modified and produced state-of-the-art, simulation-based maintenance training devices for the F-22 Raptor providing students with instruction in ground maintenance, aircraft servicing, and munitions loading. The armament training device provides hands-on skill development pertaining to the removal, installation, inspection, operation, and checkout tasks of the gun, gun doors, left main weapons bay door system and launchers, left side weapons bay launcher, right wing pylon, partial fuel system, stores management system, and weapons safing system. The trainer uses real aircraft support equipment including munitions and the portable maintenance aid (PMA). The landing gear training device allows instruction on maintenance tasks on the landing gear systems, environmental control systems, hydraulics, and electrical and electronic warfare systems. The device supports nose and right main landing gear operation, and an operational arresting hook. The aft fuselage training device is a mock-up of the left side wing, horizontal stabilizer, vertical stabilizer, engine bay, forward engine bay door, and aft engine bay door, as well as numerous light systems and engine bay area components for removal and installation task training. The F-35 Lightning II aircraft system maintenance trainer provides student maintainers comprehensive training on ground operation, maintenance, fault isolation, and testing procedures in a highly realistic simulated environment utilizing an interactive 3-D virtual aircraft environment. This realistic, 3-D virtual vehicle environment, as well as 2-D panels and displays allow students to