CESA (Compañía Española de Sistemas Aeronáuticos) is an aeronautical systems company that specializes in fluid-mechanical equipment. It offers landing gears and components, hydraulic systems, ramp hydraulic actuation systems, pneumatic and fuel systems, and other products. The company also offers customer support service, maintenance, repair, and overhaul (MRO) information, online technical support, spare parts service, and training courses.