57-1419
57-1419 is the United States [military aircraft serials|tail number] of an individual KC-135R Stratotanker operated by the Arizona Air National Guard. 57-1419 was built in 1957 and is the oldest aircraft in active United States military service. As of 2013, 57-1419 had 22,300 flight hours and was in service with the New [Hampshire Air National Guard]'s 157th Air Refueling Wing. In 2019, the aircraft was transferred to the Arizona Air National Guard.