This is a sole-source procurement for a firm fixed-price contract to supply eight Generator Controls for the B-2 aircraft, with delivery required on or before September 28, 2027. The government has determined that Hamilton Sundstrand Corporation is the only known source able to satisfy this requirement, citing proprietary data rights. While the procurement is not being conducted as a commercial acquisition, interested parties have 15 days from the notice to identify their capability to provide a commercial alternative. An ombudsman is available to confidentially address concerns from potential offerors.