The F-35 Program Office intends to modify an existing agreement on a sole-source basis for additional Flight Test Instrumentation hardware to support F-35 flight test data collection. Lockheed Martin is identified as the only responsible source due to its unique expertise and proprietary knowledge, though subcontracting opportunities may be pursued through the named contact. All responsible sources may submit a capability statement, but this notice is not a request for competitive proposals and does not obligate the government to award a contract. No specific budget, performance location, or submission deadlines are provided. Interested parties should note that program data is export-controlled and unavailable to foreign sources.