Attached is a sources sought and market research survey for a possible Long Term Contract for NSN 4140-00-289-8783, Fan Vaneaxial. This is a Qualified Products List item. If interested please fill out... Attached is a sources sought and market research survey for a possible Long Term Contract for NSN 4140-00-289-8783, Fan Vaneaxial. This is a Qualified Products List item. If interested please fill out the attached survey and return to the Point of Contact listed on the market research survey NLT July 1, 2026.