Only 1 in 4 F-35s is fully mission capable, GAO finds

The F-35 Lightning II fleet's full mission capable rate dropped to 25% in fiscal 2025, down from 38% in 2021, due to software delays, parts shortages, and corrosion. The F-35 Joint Program Office's Global Support Solution Reset aims to improve readiness by 2030 but requires an additional $13.7 billion, with risks including private sector capacity constraints and potential funding gaps.