The Pentagon allowed developmental F-35 Joint Strike Fighters, grounded because of a power issue, to return to flight operations yesterday, but kept a ban on ground operations for two production aircraft. An Air Force Safety Investigation Board, which convened Aug. 4, is still reviewing the failure of an Integrated Power Package (IPP) on a conventional-takeoff-and-landing (CTOL) variant of the F-35 on Aug. 2 at Edwards AFB, Calif. Investigators have blamed a faulty valve, though a permanent fix has not been…
Test F-35s Cleared To Fly After Grounding
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