Thomas new maintenance commander Published April 26, 2019 By Master Sgt. Daniel Butterfield GREAT FALS, Mont. -- Col. Trace Thomas, right, accepts the 120th Maintenance Group guideon from Col. Buel Dickson, 120th Airlift Wing commander, Montana Air National Guard, during a change of command ceremony April 6, 2019, Great Falls, Montana. The outgoing maintenance commander, Col. Larry Gardner, was selected as the next commander of the 141st Air Refueling Wing, Fairchild Air Force Base, Washington.