Presolicitation notice from the Department of Defense, Department of the Navy, for the repair/modification of a servomechanism, hydraulic. This item, used in aircraft hydraulic, vacuum, and de-icing systems, requires engineering source approval to maintain quality. The approved source(s) retain data rights and manufacturing/repair knowledge essential for maintaining the part's quality. Alternate sources must qualify according to the design control activity's procedures. Government source approval is required prior to contract award due to the item's flight critical nature. Interested parties must submit the necessary information for source approval. The proposed contract action is for a single source, but all responsible sources may express interest. The Government will consider all proposals received within 45 days. The solicitation provides additional information on qualification requirements. The Government is not using FAR Part 12 policies for this acquisition. Free Trade Agreements may apply to some items under this acquisition.