The U.S. Navy and U.S. Marine Corps had 100 of its R4D aircraft modified to Super DC-3 standards as the R4D-8, later redesignated C-117D.
Derimod fik U.S. Navy og U.S. Marine Corps ombygget 100 stk. af deres R4D - fly til Super DC-3 standarden under navnet R4D-8, senere omdøbt til C-117D.