In the spring of 1935, these squadrons, including the 2nd Transport Squadron at Olmsted Field, Pennsylvania, were made regular units and activated with Bellanca C-27 Airbus aircraft assigned. With enlisted men as pilots, the squadron hauled engines, parts, and other equipment to airfields in their assigned depot area, returned items to the depot, and transferred materiel between depots. They also furnished transportation for maneuvers. The rapid transport of supplies by the squadrons permitted the Air Corps to maintain low levels of materiel at its airfields, relying on replenishment from depot stocks only when needed.