In 1969 it was planned to convert four C-47s to AC-47 standard, but this plan was abandoned when 8 former SVNAF C-47s became available (five in July 1969, the last in October 1969), and 5 were converted into gunships by late September 1969. Although initial operations proved to be somewhat disappointing, the experience of the AC-47D crews grew rapidly. In December 1969 a further eight AC-47Ds were transferred to the RLAF after the de-activation of the USAF's 3rd SOS in Vietnam. By January 1970 a total of thirteen AC-47s, generally known under their USAF call sign "Spooky", were in use. Although deemed a success, two had been lost by mid 1970, including one aircraft on June 27. Only nine aircraft remained in service by late 1970. It is possible that additional USAF AC-47D gunships were recieved in 1970 and 1972. By 1973, two of the eight available aircraft had their armament removed, and were transferred to ordinary airlift and supply operations.