This is a market research notice seeking potential manufacturers for a specific aircraft heat exchanger part. The work is to be performed in support of the Defense Logistics Agency at Redstone Arsenal, Alabama. The government currently believes there are a limited number of responsible sources for this part, as the technical data is not owned by the government and reverse engineering is considered uneconomical. Interested firms that can produce the item must meet prequalification requirements and will be responsible for all engineering, manufacturing, and logistics costs. This notice is for informational purposes only and does not constitute a formal solicitation or commitment to award a contract.