AAR Corp. (AIR) is an aviation products and services company serving commercial airlines, aircraft operators, governments, and defense customers. Its Parts Supply segment sells and leases used serviceable material and distributes new OEM replacement parts. Repair and Engineering provides airframe maintenance, component repair, and landing-gear overhaul, while Integrated Solutions delivers fleet management, supply-chain logistics, and performance-based support programs. Expeditionary Services supplies mobility and field-support products for U.S. and foreign governments and nongovernmental organizations.