Presolicitation notice from the Department of Defense, Department of the Navy, and NAVSUP Weapon Systems Support is seeking a repair/modification service for a motor controller. The motor controller, identified by NSN 7R-6110-015135241-EL, is flight critical and requires Government source approval prior to contract award. The technical data available has not been determined adequate for acquisition via full and open competition. Only previously approved sources have been solicited. Interested parties must submit the necessary information detailed in the NAVSUP Weapon Systems Support Source Approval Information Brochures. The quantity required is 9 units, and delivery is FOB origin. Failure to provide all required data or document previous submission will result in disqualification.