The Defense Department has relaxed some of its flight restrictions on F-35 test aircraft after an engine issue in June led the Pentagon to ground its fleet. F-35 Joint Program Office (JPO) spokesman Joe DellaVedova said Thursday F-35 test aircraft are now allowed to fly six hours between flights only in two specific scenarios: transit to ranges for weapons testing and for in-flight refueling tests. All other flights, he said, remain on the original inspection regimen, which he did not…
