GAO Reports Delays and Challenges in F-35 Block 4 Upgrades
TL;DR
The F-35 Block 4 modernization has been delayed until at least 2031, two years later than previously projected, due to scope reductions, schedule delays, and engine upgrade postponements, with costs to be estimated in 2025. Meanwhile, aircraft and engine deliveries continue to face delays, and the GAO criticizes the incentive fee structure for contractor accountability.
- F-35 Block 4 upgrade delayed until at least 2031: GAO Breaking Defense
- Pentagon cuts back F-35 upgrades to slow schedule slips: Auditors Defense News
- The jets were late. Lockheed got on-time bonuses anyway Defense One
- GAO Report on the F-35 Joint Strike Fighter USNI News
- F-35 Continues To Over-Promise, Under-Deliver, GAO Says In New Review Bloomberg
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