The government intends a sole-source spares procurement from Northrop Grumman Systems Corporation for a Communication Equipment Interface Unit (NSN 5895-01-589-9678, P/N 544R727G01) used on the B1 aircraft, with a total quantity of 5 each and an acceptable range of 2 to 8. The item is a bus controller/common bus interface CCA assembly with connectors, hardware, and electronic components, and UID requirements will apply. Delivery is required on or before 17 February 2027 to ship-to code SW3211, and the anticipated award date is 90 days after issuance of the notice. The government does not own the necessary manufacturing data or rights, so interested firms are encouraged to contact the OEM, and this acquisition will not be set aside. All responsible sources may submit a proposal, but the government intends to solicit and negotiate with only one or a limited number of sources.