Boeing 787 Engines’ Ice Risk Spurs FAA to Warn Airlines

U.S. regulators ordered airlines to avoid flying Boeing Co. 787 Dreamliners and 747-8 jumbo jets with General Electric Co. engines near thunderstorms after some of the planes experienced ice buildup.

An airworthiness directive published online today in the Federal Register instructs pilots to fly clear of high-altitude icing conditions that could sap thrust and damage GEnx engines. The Federal Aviation Administration move follows Japan Airlines Co.’s shift to other jets from 787s on some Asia routes.