AAR CORP. provides products and services for aircraft fleet operators, original equipment manufacturers, independent service providers, and military customers. It operates in four segments: Aviation Supply Chain; Maintenance, Repair, and Overhaul; Structures and Systems; and Aircraft Sales and Leasing. The Aviation Supply Chain segment sells various new, overhauled, and repaired engine and airframe parts and components for airline and defense customers. It also repairs and overhauls avionics, electrical, electronic, fuel, hydraulic, and pneumatic components and instruments, as well as internal airframe components. In addition, this segment inventory supply and management programs, and logistics programs for engine and airframe parts and components, as well as sells and leases commercial jet engines. The Maintenance, Repair, and Overhaul segment provides airframe maintenance services; and the repair and overhaul of various landing gears. It also provides airframe maintenance, modification, special equipment installation, painting services, and aircraft terminal services for various models of commercial, defense, regional, business, and general aviation aircrafts. The Structures and Systems segment engages in the design, manufacture, and repair of pallets, containers, and shelters in support of military and humanitarian tactical deployment activities. It also designs, manufactures, and installs in-plane cargo loading and handling systems for commercial and military aircraft and helicopters. In addition, this segment designs and manufactures composite materials for commercial, business, and military aircrafts, as well as composite structures for the transportation industry. The Aircraft Sales and Leasing segment sells and leases used commercial aircraft. It also provides advisory services, which include assistance in remarketing aircraft, records management, and storage maintenance. The company was founded in 1951 and is based in Wood Dale, Illinois.