This solicitation is for the repair of Joint Helmet Mounted Cueing Systems (JHMCS) over a three year period. The Department of the Air Force Materiel Command Air Force Sustainment Center will award an Indefinite Delivery, Requirements type contract with Firm Fixed Price repair Contract Line Items. The JHMCS is currently installed on over 908 USAF F-15 and F-16 fighter aircraft, as well as over eleven FMS countries flying JHMCS configured jets. Additional countries are considering the system for their defense needs. The period of performance is from the date of award through three years, consisting of a 12-month basic period and two additional 12-month ordering periods, plus an optional 6-month extension.