29 Nov '44: TOS USAAF as C-47B. Nov '44 to 1947: four units at three bases. Ca.1947: Converted to C-47D. 1947 to 1974: Seventeen units at six bases. 30 Jun '75: Retired and flown from Eglin AFB, FL to the Air Force Museum. It was the last C-47 in USAF service and ended with 20,821 flying hours.