Japan Air Lines, which had a similar incident in December 2020, retired all of its P&W-equipped Boeing 777-200s a year earlier than planned in March 2021. operators of airplanes equipped with similar Pratt & Whitney PW4000-112 series engines to inspect these engines' fan blades before further flight. Federal Aviation Administration, which issued an Emergency Airworthiness Directive requiring U.S. Similar 777-200 series aircraft were quickly grounded by several national aviation authorities, including the U.S. National Transportation Safety Board immediately began investigating. There were no reported injuries to persons onboard or on the ground. The crew secured the failed engine, and the aircraft returned to Denver using the remaining working engine, landing without further incident 24 minutes after takeoff at 13:28 local time. The failed engine was a Pratt & Whitney (P&W) model PW4077 turbofan.

Passengers also recorded video of the engine nacelle damage and in-flight fire and posted these to social media. The engine failure resulted in an in-flight engine fire, extensive damage to the engine nacelle, and minor damage to the fuselage. Debris fell through the roof of a private home and significantly damaged a parked vehicle. Falling debris was recorded by eyewitnesses using smartphone cameras and a dash cam. Parts departing from the engine cowling of the Boeing 777-222 aircraft resulted in a debris field at least 1 mile (1.6 km) long over suburban residential areas of Broomfield, Colorado.

domestic passenger flight from Denver to Honolulu, suffered a contained engine failure four minutes after takeoff from Denver International Airport (DEN). On February 20, 2021, United Airlines Flight 328 ( UA328/UA元28), a scheduled U.S. Inouye International Airport (HNL), Honolulu, Hawaiiįlight path of United Airlines Flight 328

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