Boeing is revising the 777X test plan to maximize ground evaluations as it attempts to compensate for a lengthy delay to first flight following the recent discovery of a durability issue on the aircraft’s General Electric GE9X engines. “The long pole in the tent remains engine issues identified during aggressive testing of the GE9X under rigorous operating conditions. We are staying very close to this situation as it evolves,” Boeing Commercial Airplanes president Kevin ...

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