AAR Aircraft Services is an independent provider of maintenance and engineering services through its four MRO or maintenance, repair and overhaul bases in the United States. It is the second-largest independent MRO provider in North America and ranks among the top 10 in the world.
It is part of AAR Corp., a publicly held company based in Wood Dale, Ill., that has facilities and sales locations around the world providing aerospace products and services to aviation and government/defense customers.
Founded in 1951, AAR Corp. has 6,500 employees in 13 countries and annual revenues of $1.7 billion. It uses a close-to-the-customer business model. Its client list includes American Airlines, FedEx, Airbus, Boeing, Lockheed Martin, Cessna and the Japanese and U.S. governments. It is ranked among the world's top 100 defense contractors.