AAR Corp provides products and services to the worldwide aviation, government, and defense markets. The company has two business segments: aviation services (roughly three fourths of total sales) and expeditionary services. The aviation services segment provides aftermarket support and services for a wide range of aircraft. It sells and leases a variety of new and repaired engine and airframe parts. Additionally, the company provides customized inventory supply management and logistics to help with planning and maintenance. Expeditionary services contains businesses that provide support services for moving equipment and personnel. The majority of sales derive from the United States, with Europe accounting for the remainder.