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F-35B Grounding Traced to Crimped Tubing, Pentagon Says

An “improperly crimped” fluid line was the probable cause of a propulsion-system leak that led the Pentagon to suspend flight tests of the F-35 fighter’s Marine Corps version, according to the Pentagon.

The investigation “ruled out any design or maintenance issues,” Pentagon spokesman Joe DellaVedova said yesterday in an e-mailed statement. The evidence revealed “a quality discrepancy” resulting in the crimped line, he said.