As the name DRAGON (Diminishing Manufacturing Sources Replacement of Avionics for Global Operations and Navigation) suggests, one of the problems the AWACS fleets are having is finding parts for their old avionics. Both the USA (Block 40-45) and NATO (Mid-Term Modernisation) have implemented billion-dollar upgrade programs for radar and mission systems over the last decade, but that doesn’t mean much if you can’t fly the plane. New ICAO standards as of 2015 add another layer of urgency, in order to keep the fleet flying within international civil airspace.