439th Maintenance Operations Squadron

The 439th Maintenance Operations Squadron (MOS) was a unit of the United States Air Force Reserve, assigned to the 439th Maintenance Group at Westover Air Reserve Base, Massachusetts. Its primary mission was to provide maintenance operations support, ensuring the readiness and effectiveness of aircraft assigned to the 439th Airlift Wing, particularly the C-5 Galaxy fleet. The squadron managed maintenance planning, scheduling, training, and quality assurance programs to support air mobility and global reach missions. The 439th MOS was inactivated in the early 2010s as part of an Air Force-wide reorganization, streamlining maintenance operations under consolidated structures.