The DLA Aviation Philadelphia is seeking contractors to manufacture a specific heat exchanger (NSN 7RH 1660 015997631, P/N 814209-3). The government intends to solicit and negotiate with only one or a limited number of sources and does not possess the manufacturing data for the item. All responsible sources may submit capability statements, and proposals received within 16 days of the notice's publication may be considered. The location for performance is Philadelphia. Only approved sources will be solicited, and unapproved sources must submit a Source Approval Request package with their proposal.