EPAWSS comes standard in the new F-15EX Eagle II, and the Air Force wants to retrofit some existing F-15E jets with the advanced electronic warfare system.
Key lawmakers grew frustrated with the F-35 program earlier this year, as critical upgrades stalled and jets piled up at Lockheed Martin's Texas factory.
Lockheed Martin has felt financial strain as early funding for the upcoming F-35 jets dried up, but kept working on them to avoid supply chain disruptions.