Damage to United Boeing 777 engine consistent with metal fatigue, NTSB says

Damage to United Boeing 777 engine consistent with metal fatigue, NTSB says
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WASHINGTON — U.S. National Transportation Safety Board Chairman Robert Sumwalt said Monday that damage to a fan blade in a Pratt & Whitney engine that failed in a United Airlines Boeing 777-200 is consistent with metal fatigue, according to a preliminary assessment.

At a news briefing, Sumwalt said it was not clear whether Saturday’s failure of the PW4000 engine with a “loud bang” four minutes after takeoff is consistent with another engine failure on another Hawaii-bound United flight in February 2018 that was attributed to a fatigue fracture in a fan blade.

The engine that failed on the 26-year-old Boeing Co 777 and shed parts over a Denver suburb was a PW4000 used on less than 10% of the global fleet of 777 widebody jets.

In another incident on Japan Airlines (JAL) 777 with a PW4000…



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