Presolicitation notice from the Department of Defense, Department of the Navy, and NAVSUP Weapon Systems Support is seeking a control box, electric for repair/modification purposes. This item is used in aircraft air conditioning, heating, and pressurizing equipment. The notice specifies that the item requires government source approval prior to contract award due to its flight critical nature and inadequate technical data. Only previously approved sources have been solicited. The notice also provides links to the NAVSUP WSS Source Approval Information Brochures for spares and repair. It emphasizes that failure to provide all required data or previous submission of data will result in disqualification. The notice states that if source approval cannot be processed in time, award may still be made based on fleet support needs. The NAVSUP WSS Commercial Item Identification Brochure is also available for reference.