This is a notice of intent to award a sole-source contract to Lockheed Martin Aeronautics in Fort Worth, TX for non-recurring engineering support to redesign F-35 structure and systems. The work includes investigation, analysis, testing, and qualification to address production flaws, fleet issues, and improvements. While the government believes only Lockheed Martin can fulfill the requirement, other responsible sources may submit a capability statement for consideration. The anticipated award for the resulting contract action is in the second quarter of calendar year 2026. No budget information is provided in the notice.