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Aircraft
Investigators Find Metal Fatigue in UAL 777’s Failed Engine
NTSB chairman Robert Sumwalt said that a fan blade from the PW4000 that failed in-flight on February 20 showed so-called "beach" marks.
NTSB investigators record the damage to the PW4000-112 engine that failed on a United Airlines Boeing 777-200. (Photo: NTSB)
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By
Gregory Polek
• Senior Editor
February 23, 2021
In this article
Boeing 777
Aircraft
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