1 Maintenance Group ACC (U.S. Air Force) The 1 Maintenance Group ACC (Air Combat Command), a unit of the United States Air Force, specializes in maintenance operations. Based at Joint Base Langley-Eustis in Hampton, Virginia, it provides maintenance support for the aircraft and equipment used by various Air Combat Command units across multiple air bases. The group’s primary mission is to ensure operational readiness of these assets, which are crucial for the execution of military operations worldwide. The 1 Maintenance Group ACC operates under the broader command structure of the U.S. Air Force and contributes significantly to its mission of airpower employment.