Boeing: Dreamliner engines have icing risk November 24, 2013 -- Updated 0210 GMT (1010 HKT) Boeing says some GE engines need fix for icing Caution to avoid storms applies to some 747-8 planes as well as 787 Dreamliners The Dreamliner is Boeing's latest high-tech, fuel-efficient airliner (CNN) -- Boeing has warned airlines to keep some 747-8 and 787 aircraft away from certain storms because of possible icing problems in engines. The aircraft manufacturer sent a message to "customers who operate some GE-powered engines after instances of ice crystal icing that resulted in temporary diminished engine performance," spokesman Marc Birtel said in a statement. Boeing said pilots should keep the planes at least 50 nautical miles from storms that may contain ice crystals until General Electric can make improvements to the "GEnx" engines. Only a small number of the engines have had a problem with ice crystals, the statement said. Boeing began delivering its 787 Dreamliners in 2011. The model is billed as a super-efficient, high-technology airliner of the future, and it flew without major problems for a year. But a battery fire forced the diversion of an All Nippon Airways flight in January 2013. The entire fleet of 50 planes was grounded for four months while Boeing made repairs. Later, a United Airlines Dreamliner made an emergency landing in Houston with brake problems and a fire broke out on an unoccupied Ethiopian Airlines Dreamliner in London. There also have been investigations into a faulty fuel pump indicator, an electric panel, a plane oven and emergency beacons. CNN's Tory Dunnan and Mike Ahlers contributed to this report