Presolicitation notice from the Department of Defense, Department of the Navy, for the procurement of an Antenna Group Assembly for repair/modification. The item is used in aircraft and is flight critical. Government source approval is required prior to contract award. Interested parties must submit the necessary information for source approval. The solicitation provides links to the source approval information brochures. Offers that do not provide all required data will not be considered. The notice also provides information on obtaining military and federal specifications and standards. The Government is not using the policies for the acquisition of commercial items. Interested parties with capability to satisfy the requirement with a commercial item must notify the contracting officer within 15 days.