AAR Corp. provides various products & services to the aviation & defense industries world wide. Its principal customers are The Boeing Co. and Airbus. It has 2 business segments: Aviation Services and Expeditionary Services. The Aviation Services unit provides aftermarket support & services for the commercial aviation, and government & defense markets. It sells & leases various new, overhauled and repaired engine & airframe parts & components, and aircraft to commercial aviation and government/defense customers. It provides inventory management & distribution services, overhaul, repair and engineering services. The Expeditionary Services segment includes airlift & mobility activities. This division provides products and services for the movement of equipment and personnel by the U.S. Department of Defense, foreign governments/ non-governmental organizations. This unit also designs manufactures and installs in-plane cargo loading and handling systems for commercial aircraft, military aircraft and helicopters.