The 317 Maintenance Group AMC (Air Mobility Command) is a key maintenance unit within the U.S. Air Force. Based primarily at Travis Air Force Base, California, this group is responsible for ensuring the readiness of various aircraft types, including the C-5 Galaxy and C-17 Globemaster III. The 317 Maintenance Group also provides maintenance support services for other Air Mobility Command units. Its mission is critical to the U.S. Air Force's ability to rapidly deploy forces and supplies around the world.