While the Northrop Grumman E-8 Joint STARS aircraft was a recent development, it is the last such type based on the 707.
Installing the high technology systems envisaged for the MC2A on an increasingly obsolete airframe would not provide the capability required.
In August 2003, Air International reported that the goal of integrating air- and ground-search radars on a single airframe was abandoned.
[2] The smaller version of the MP-RTIP AESA radar designed to be flown on the Northrop Grumman RQ-4B Global Hawk is being flight tested on the Scaled Composites Proteus aircraft.
Boeing had kept the E-10 prototype (767-400ER) at Paine Field in Everett, Washington, until it was sold to Bahrain in January 2009 for conversion into a VIP transport.