Qantas 747-400. Photo: Courtesy, Qantas. Qantas will fast-track modifications of Rolls-Royce RB211 engines powering its Boeing 747-400 fleet to stem failures caused by cracked high-pressure compressor blades, of which the airline has suffered three this year and two late last year (ATW Daily News, Nov. 8, 2010). The engine manufacturer has acknowledged the problem, caused by a distortion of the compressor case resulting in the tips of fan blades cracking and disintegrating. Rolls ...

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