This is a procurement for 15 units of a flight-critical part that requires government source approval prior to contract award. Only sources already approved by the government for this specific item have been solicited. The process for a new source to gain approval is lengthy and typically cannot be completed in time for this award. Unapproved sources must submit a detailed source approval information package along with their proposal, using the specified NAVSUP WSS brochures. Offers from unapproved sources that do not include the complete required approval data will not be considered.