 In mid-1991, early F-15C versions were received, and the Hawaii ANG operated both the A and C models of the Eagle for the next two decades.In 1989 with inactivation of the PACAF 326th Air Division, the 154th Composite Group took over the air defense Radar mission in Hawaii.The 169th Aircraft Control and Warning Squadron began operating a JSS radar site at Mount Kaala, Oahu along with the FAA, and the 150th Aircraft Control and Warning Flight operates a joint-use JSS radar site at Kokee Air Force Station, Kauai.