- Only one in four F-35s achieved full mission capability
- Mission capable rates fell sharply between 2021 and 2025
- Software delays continue affecting readiness across newly delivered aircraft
The Pentagon's F-35 fighter fleet continues to face readiness challenges despite years of investment, modernization efforts, and sustained contractor support, as a US Government Accountability Office (GAO) report found only 25% of the aircraft were fully mission capable during fiscal 2025.