The 721st Aircraft Maintenance Squadron is a United States Air Force unit dedicated to the maintenance and upkeep of military aircraft. As part of the U.S. Air Combat Command, this squadron ensures the readiness of aircraft fleets, including fighter jets and transport planes. Its duties encompass tasks such as routine inspections, repairs, overhauls, and modifications to maintain optimal operational condition. The 721st AMS operates under the 438th Air Mobility Wing at Joint Base Charleston in South Carolina.