General Electric is resuming its production ramp-up of GE9X engines for Boeing’s 777-9 following the faster-than-expected test and validation of fixes to the durability problem which forced the airframe maker to delay the big twinjet’s first flight into early 2020. The rushed retrofit schedule, which was put in place after durability issues were uncovered on a ground test engine in June, will enable Boeing to stay on track towards a likely first flight attempt in January. Three ...


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