Presolicitation notice from the Department of Defense, Department of the Navy, and NAVSUP Weapon Systems Support is seeking a fan, vaneaxial. This item is typically used for air circulation and blower equipment. The notice requires Government source approval prior to contract award due to the item being flight critical and/or inadequate technical data. Only previously approved sources have been solicited. Interested parties must submit the necessary information for source approval. The notice includes links to the NAVSUP Weapon Systems Support Source Approval Information Brochures. Failure to provide all required data will result in disqualification. If source approval cannot be processed in time, award may be based on Fleet support needs.