Boeing recently reactivated its fourth 777-9 test aircraft, WH004, and added it to FAA flight testing.
Credit: Joe Walker
As Boeing’s 777-9 certification program moves through its final phases, flight tests are validating changes made to GE Aerospace GE9X engines that address issues flagged earlier in the prolonged development program. The four-aircraft 777-9 test fleet includes some production-standard engines with...
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