Engine Failures Spotlight Inspection, Certification Issues

March 04, 2021
United Flight 328 aircraft with cracked fan blade
A cracked fan blade is being eyed as the cause in three PW4000-powered 777 engine failures, including United Flight 328 on Feb. 20.
Credit: Hayden Smith
The Feb. 20 inflight failure of a Pratt & Whitney PW4077 engine on a United Airlines Boeing 777-222 involving a cracked fan blade—the second incident in 10 weeks and third in three years—raises two primary concerns for global safety regulators. Engine failures spotlight Inspection and certification...

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