503d Aircraft Warning Group

337th Aeronautical Systems Group
Iraqi Air Force Cessna 172 Skyhawks at Kirkuk Air Base
Active	1942-1944, 1955-1966, 2005-2008
Country	United States
Branch	United States Air Force
Role	Systems Development
Part of	Air Force Materiel Command
Decorations	Air Force Outstanding Unit Award
Insignia
337th Fighter Group emblem (Approved 26 June 1957)

The 337th Aeronautical Systems Group is an inactive United States Air Force unit. Its last assignment was with the Aeronautical Systems Center of Air Force Materiel Command at Wright Patterson Air Force Base, Ohio, where it was inactivated in 2008.

The group was first activated in 1942 at Morris Field, North Carolina as the 337th Fighter Group. During World War II it acted as a Replacement Training Unit for fighter pilots. The group was disbanded in 1944 in a major reorganization of Army Air Forces training units.

The 337th was activated again in 1955, when it replaced the 503d Air Defense Group at Portland International Airport as part of Air Defense Command (ADC)'s Project Arrow, which was designed to revive fighter units that had served during World War II and replace ADC's post-war units. It provided air defense for the Pacific northwest until it was inactivated in 1966, earning two Air Force Outstanding Unit Awards.

In January 2005 the Training Aircraft Systems Group was activated as part of the Air Force Materiel Command Transformation, which replaced traditional procurement offices with wings, groups and squadrons. In May 2006 the two groups were consolidated and the consolidated unit named the 337th Aeronautical Systems Group. In 2008, the unit was inactivated and its squadrons reassigned to the 877th Aeronautical Systems Group.