This is a market research request for 10 units of a specific aircraft part (FCU, NSN 5895-01-675-2571), with an estimated delivery schedule of 18 months and performance in the United States. The government states the supplies are available from only one or a limited number of sources and does not plan to acquire it as a commercial item, though vendors may challenge this within 30 days. It is not expected to be set aside for small businesses, but small firms are suggested to contact BAE or Ametek for subcontracting opportunities. Foreign participation is not permitted at the prime contractor level.