A group of airlines operating mostly brand new Boeing 777-300ERs powered by General Electric GE90-115Bs are either replacing entire engines or transfer gearboxes on individual units after GE alerted them to the potential for a gear separation. The engine manufacturer has issued two service bulletins (SBs) to GE90-115B operators after two in-flight shut downs due to gear separation within the Avio-made gearboxes. The first event occurred on Feb. 11 when an Aeroflot 777-300ER shut ...


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