635 Materiel Maintenance Squadron (AFMC) – U.S. Air Force The 635 Materiel Maintenance Squadron (MMS) is a key unit within the United States Air Force’s Air Force Materiel Command (AFMC). This squadron specializes in maintenance operations and supports various aircraft types, ensuring their operational readiness. The squadron, located at Wright-Patterson Air Force Base in Ohio, plays a crucial role in maintaining the U.S. Air Force’s inventory of equipment and supplies. The 635 MMS follows strict guidelines and procedures to ensure the efficient and effective maintenance of its assigned assets, thus contributing significantly to the overall readiness of the U.S. Air Force.