The Government intends a sole-source acquisition under FAR 6.302-1 for 61 units of NSN 7R-1650-014552590-QE, delivered FOB origin. The item is flight critical and requires Government engineering source approval by the design control activity because approved sources retain essential design, manufacturing, and repair data not economically available to the Government. Only previously approved sources have been solicited; new sources must qualify under the design control activity’s procedures and submit the required Source Approval Information Brochure data with their offer. Offers lacking all required source-approval data or evidence of prior complete submission will not be considered. Award will be made only if the offeror, product/service, or manufacturer meets the qualification requirements at time of award.