| Boeing spokesman Marc Birtel said Saturday that 
				Boeing issued the advisory after ice crystal formation in some 
				instances diminished engine performance. Airlines with planes 
				affected include United, Japan Airlines, Lufthansa and Air 
				India. Models affected are the 747-8 and the 787, which Boeing 
				Co. calls the Dreamliner.
 				"To reduce chances of ice crystal conditions, Boeing recommends 
				that operators fly at least 50 nautical miles from thunderstorms 
				that may contain ice crystals," Boeing said in its statement.
 				The advisory covers Boeing planes with General Electric Co.'s 
				GEnx engine. In its statement, Boeing said that GE is "working 
				diligently" to deal with the issue and that corrective changes 
				"will be introduced into the fleet as soon as they are 
				available."
 				It's the latest problem to confront the 787. Earlier this year, 
				the 787 was grounded after two planes suffered from smoldering 
				batteries. Flights resumed after Boeing redesigned the battery 
				system. [Associated 
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