The decision represents a major victory for Pratt & Whitney, the company that makes the F-35's current F135 engines that will be upgraded.
The resumption of acceptance flights will pave the way for deliveries of F-35s, halted for nearly three months, to resume.
The affected F-35s could be back in the air in one to two weeks.
The halt in acceptance flights and deliveries following the mishap meant Lockheed Martin delivered fewer F-35s than required in 2022.
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