Presolicitation notice from the Department of Defense, specifically the Department of the Navy, is seeking repair/modification services for an antenna. The antenna, classified under the PSC industry category of "Antennas, Waveguides, and Related Equipment," has a National Stock Number (NSN) of 0R-5985-016984608-RQ and a total quantity of 4 units. The delivery is expected to be FOB Origin. This notice of intent is not a request for competitive quotes, as the government intends to negotiate with only one source. Interested parties can express their interest and capability to respond to the requirement or submit quotes. The design of the antenna is unstable, requiring major changes due to low process yield or marginal performance. Limited acquisition/repair from the current source is anticipated until configuration changes are made. Government source approval is necessary before contract award, as the item is flight critical and the technical data available is insufficient for full and open competition. Only previously approved sources have been solicited. If not an approved source, the submission of detailed information is required. The proposed contract action falls under FAR 6.302-1, allowing the government to solicit and negotiate with only one source. All responsible sources may still identify their interest and capability to respond. The government is not using FAR Part 12 policies for this solicitation, but interested parties can still identify their capability to provide a commercial item. The acquisition may be subject to Free Trade Agreements and the Buy American Act.