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AAR Corp. provides products and services to commercial aviation, government, and defense markets worldwide. It operates through Aviation Services and Expeditionary Services segments. The Aviation Services segment engages in lease and sale of new, overhauled and repaired engine, and airframe parts and components, as well as aircrafts; and offers customized flight hour component inventory and repair, warranty claim management, and outsourcing programs for engine and airframe parts and components. This segment also provides fleet management and operations of customer-owned aircraft for the U.S. Department of State; customized performance-based supply chain logistics programs, which includes material planning, sourcing, logistics, information and program management, airframe and maintenance planning, and component repair, and overhaul services for U.S. Department of Defense and foreign governments. Further, it offers airframe inspection, maintenance, repair and overhaul, painting services, line maintenance, modifications, structural repairs, avionics service and installation, exterior and interior refurbishment, and engineering services and support; and repair and overhaul components including landing gears, wheels, and brakes for commercial and military aircraft; and operates six airframe maintenance facilities and one landing gear overhaul facility. The Expeditionary Services segment designs, manufactures, and repairs transportation pallets and containers and shelters for military and humanitarian tactical deployment activities, including armories, supply and parts storage, refrigeration systems, tactical operation centers, briefing rooms, laundry and kitchen facilities, water treatment, and sleeping quarters, as well as engages in provision of engineering, design, and system integration services for specialized command and control systems. AAR Corp. was founded in 1951 and is headquartered in Wood Dale, Illinois.

Astronics Corporation, through its subsidiaries, designs and manufactures products for the aerospace, defense, and electronics industries in the United States, rest of North America, Asia, Europe, South America, and internationally. The company operates in two segments, Aerospace and Test Systems. The Aerospace segment offers lighting and safety systems, electrical power generation systems, distribution and seat motions systems, aircraft structures, avionics products, system certification, and other products. This segment serves airframe manufacturers (OEM) that build aircraft for the commercial, military, and general aviation markets; suppliers to OEMs; and aircraft operators, such as airlines; suppliers to the aircraft operators; and branches of the U.S. Department of Defense. The Test Systems segment designs, develops, manufactures, and maintains automated test systems that support the aerospace and defense, and mass transit industries, as well as training and simulation devices for commercial and military applications. It serves OEMs and prime government contractors for electronics and military products. Astronics Corporation was incorporated in 1968 and is headquartered in East Aurora, New York.

Astronics Corporation, through its subsidiaries, designs and manufactures products for the aerospace, defense, and electronics industries in the United States, rest of North America, Asia, Europe, South America, and internationally. The company operates in two segments, Aerospace and Test Systems. The Aerospace segment offers lighting and safety systems, electrical power generation systems, distribution and seat motions systems, aircraft structures, avionics products, system certification, and other products. This segment serves airframe manufacturers (OEM) that build aircraft for the commercial, military, and general aviation markets; suppliers to OEMs; and aircraft operators, such as airlines; suppliers to the aircraft operators; and branches of the U.S. Department of Defense. The Test Systems segment designs, develops, manufactures, and maintains automated test systems that support the aerospace and defense, and mass transit industries, as well as training and simulation devices for commercial and military applications. It serves OEMs and prime government contractors for electronics and military products. Astronics Corporation was incorporated in 1968 and is headquartered in East Aurora, New York.

Ducommun Incorporated provides engineering and manufacturing services for products and applications used primarily in the aerospace and defense, industrial, medical, and other industries in the United States. The company operates through two segments, Electronic Systems and Structural Systems. The Electronic Systems segment provides cable assemblies and interconnect systems; printed circuit board assemblies; electronic, electromechanical, and mechanical components and assemblies, as well as lightning diversion systems; and radar enclosures, aircraft avionics racks, shipboard communications and control enclosures, printed circuit board assemblies, cable assemblies, wire harnesses, interconnect systems, lightning diversion strips, surge suppressors, conformal shields, and other assemblies. The segment also supplies engineered products, including illuminated pushbutton switches and panels for aviation and test systems; microwave and millimeter switches and filters for radio frequency systems and test instrumentation; and motors and resolvers for motion control. In addition, this segment provides engineering expertise for aerospace system design, development, integration, and testing. The Structural Systems segment designs, engineers, and manufactures contoured aluminum, titanium, and Inconel aero structure components; structural assembly products, such as winglets, engine components, and fuselage structural panels; aerodynamic systems; and metal and composite bonded structures and assemblies comprising aircraft wing spoilers, large fuselage skins, rotor blades on rotary-wing aircraft and components, flight control surfaces, engine components, ammunition handling systems, and magnetic seals. It serves commercial aircraft, military fixed-wing aircraft, military and commercial rotary-wing aircraft, and space programs, as well as industrial, medical, and other end-use markets. The company was founded in 1849 and is headquartered in Santa Ana, California.

Triumph Group, Inc. designs, engineers, manufactures, repairs, overhauls, and distributes aerostructures, aircraft components, accessories, subassemblies, and systems worldwide. It operates in two segments, Triumph Systems & Support, and Triumph Interiors. The company offers aircraft and engine-mounted accessory drives, thermal control systems and components, cargo hooks, high lift actuations, cockpit control levers, hydraulic systems and components, control system valve bodies, landing gear actuation systems, electronic engine controls, landing gear components and assemblies, exhaust nozzles and ducting, main engine gearbox assemblies, geared transmissions and drive train components, main fuel pumps, fuel-metering units, primary and secondary flight control systems, and vibration absorbers. It also provides thermo-acoustic insulation systems, environmental control system ducting, and other aircraft interior components. In addition, the company offers air cycle machines, blades and vanes, auxiliary power units, constant speed drives, combustors, engine and airframe accessories, stators, flight control surfaces, transition ducts, integrated drive generators, sidewalls, nacelles, light assemblies, remote sensors, overhead bins, thrust reversers, and fuel bladder cells, as well as cabin panes, shades, light lenses, and other components. It serves original equipment manufacturers of commercial, regional, and military aircraft. The company was incorporated in 1993 and is headquartered in Radnor, Pennsylvania.