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Pentagon Watchdog Blames Lockheed for Poor F-35 Maintenance

A Lockheed Martin F-35A Lightning II Joint Strike Fighter (JSF) jet.

Photographer: Nathan Laine/Bloomberg

The US fleet of F-35s, the most sophisticated stealth fighter jet in the world, was only available to fly half of the time because of poor maintenance by Lockheed Martin Corp., a government watchdog said.

The average availability rate of F-35s throughout fiscal year 2024 was just 50% partly because the Pentagon “did not consistently hold Lockheed Martin accountable for poor performance related to F-35 sustainment,” according to a report from the Defense Department’s Office of the Inspector General.