This is a follow-on sole source requirements contract for the repair of the B-52H AN/ALQ-172 Electronic Countermeasures System, intended for award to L3Harris Corporation as the Original Equipment Manufacturer. The scope includes the repair of specific system components, such as Shop Replaceable Units, to meet detailed military specifications. The requirement is military unique and cannot be acquired commercially. The solicitation lists specific National Stock Numbers and their estimated quantities for repair pricing. The contract is being pursued under the authority for awarding to a single responsible source.