The 463rd Field Maintenance Squadron (FMS) was a United States Air Force unit primarily responsible for maintaining and supporting the aircraft assigned to the 463rd Airlift Wing. Activated during the Cold War era, the squadron played a vital role in ensuring the operational readiness of tactical airlift aircraft, notably the C-130 Hercules. Stationed at Dyess Air Force Base, Texas, the 463rd FMS provided essential maintenance, repair, and logistical support for airlift missions worldwide. The unit contributed significantly to air mobility operations until its inactivation or reorganization during subsequent USAF structural changes.