The Federal Aviation Administration on Wednesday required US airlines to inspect General Electric engines on Boeing 787 Dreamliner and 747-8 aircraft that experience icing problems which could lead to loss of thrust.The FAA also required airlines to prohibit pilots from flying into high-altitude, icy weather conditions. The decision to issue an airworthiness directive had been expected.The agency said that in certain kinds of high-altitude thunderstorms, ice crystals entered and damaged the engines, causing temporary loss of thrust, or in some cases increased vibration with no loss of thrust. The problems affected nine flights, and in two cases involving 747-8s it affected two of four engines.
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Gravity always wins!