NASA's Armstrong Flight Research Center requires modification of a specific Boeing 737-73W aircraft (S/N 40116) for reduced gravity flight operations. The scope includes a feasibility assessment, cabin modifications, exterior painting with NASA identifiers, overdue maintenance, and disposition for previous permanent modifications. The agency intends to award a sole-source contract to Denmar Technical Services, Inc., citing them as the only responsible source capable of meeting the requirements. Interested organizations may submit their capabilities for evaluation to determine if the acquisition should be made competitive. Submissions must be sent via email to the specified contacts.