General Electric is introducing a final series of software and hardware improvements to mitigate the threat of core icing on its GE90 and GEnx engines, and is using lessons learned from the modifications to ensure no ice-related surprises occur with the GE9X in development for Boeing's 777X. Solutions range from improved software for faster ice- crystal-icing (ICI) detection in the GEnx to hardware changes that reduce exposure to engine-icing issues in the GE90-94 by rehousing temperature sensors. The software change is particularly important for the GEnx-1B-powered 787 and GEnx-2B-powered 747-8 because it clears operators to resume flying at higher, more economical altitudes in areas of known icing.
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