A staff of JAL walks past one of the company's Boeing Co's 787 Dreamliner plane at Narita international airport in Narita, east of TokyoWith the aid of Alwyn Scott and Hideyuki Sano SEATTLE/TOKYO (Reuters) – Boeing recommended airlines on Friday a few possibility of engine icing problems on its new 747-8 and 787 Dreamliner planes with engines made via Normal Electric, urging 15 carriers to avoid flying them near high-stage thunderstorms. The warning led Japan Airways to pull 787 Dreamliners from two international routes. Different affected airlines include Lufthansa, United Airlines, an arm of United Continental Holdings and Cathay Pacific Airlines.