 An upgrade to the F-14D's computer software to allow AIM-120 AMRAAM missile capability was planned but was later terminated.While upgrades had kept the F-14 competitive with modern fighter aircraft technology, Cheney called the F-14 1960s technology.Despite an appeal from the Secretary of the Navy for at least 132 F-14Ds and some aggressive proposals from Grumman for a replacement, Cheney planned to replace the F-14 with a fighter that was not manufactured by Grumman.