This is a sole-source notice for the repair of four (4) CIRCUIT CARD ASSEMBLY units, with delivery FOB Origin. The government intends to negotiate only with one source as it does not own the technical data needed for competition. Interested parties may express interest and capability within 5 days of this notice. A firm-fixed price contract will be issued, and award will only be made if the offeror or manufacturer meets qualification requirements. No specific budget amount or performance location is specified.