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The engine that failed on the 26-year-old Boeing Co 777 and shed parts over a Denver suburb was a PW4000 used on 128 planes, or less than 10% of the global fleet of more than 1,600 delivered 777 wide-body jets.
In another incident on Japan Airlines (JAL) 777 with a PW4000 engine in December 2020, Japan s Transport Safety Board reported it found two damaged fan blades, one with a metal fatigue crack. An investigation is ongoing.
The focus is more on engine maker Pratt & Whitney and analysts expect little financial impact on Boeing, but the PW4000 issues are a fresh headache for the plane maker as it recovers from the far more serious 737 MAX crisis. Boeing s flagship narrowbody jet was grounded for nearly two years after two deadly crashes.
Email
Boeing 777 grounding explained visually: Pratt and Whitney engine failure involved in two incidents on same day
Two Boeing planes dropped engine parts on Saturday. Same engine manufacturer as past events. NTSB eyes fan blades cited in scary 2018 United flight.
George Petras and Janet Loehrke, USA TODAY
Published
7:13 pm UTC Feb. 24, 2021
Air safety officials are focusing on engine fan blades in their investigation of what caused a massive engine failure aboard a Boeing 777-222 commercial airliner Saturday, strewing huge aircraft parts across neighborhoods in suburban Denver.
This engine failure may be related to several others stretching back for years, but first let s review the details of the most recent event.
Damage to United Boeing 777 engine consistent with metal fatigue: NTSB By David Shepardson and Jamie Freed
United Airlines flight UA328 returns to Denver International Airport with its starboard engine on fire after it called a Mayday alert
WASHINGTON (Reuters) – Damage to a fan blade on an engine that failed on a United Airlines Boeing 777 flight is consistent with metal fatigue, based on a preliminary assessment, the chairman of the U.S. air accident investigator said on Monday.
The Pratt & Whitney PW4000 engine failed on Saturday with a “loud bang” four minutes after takeoff from Denver, National Transportation Safety Board (NTSB) Chairman Robert Sumwalt told reporters following an initial analysis of the flight data recorder and cockpit voice recorder.
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