![]() In December 2020, a Japan Air Lines 777-200 suffered failure of a PW4074, an incident involving loss of a panel and fan-blade damage. ![]() Its report notes that P&W did not uncover blade fractures during a 2015 examination due to lack of formal and recurrent training for inspectors. The NTSB attributes the 2018 failure to “a full-length fan blade fracture”. That jet’s PW4077 also lost its cowling, including its forward cowl, during the failure, and engine components punctured the jet’s fuselage.Īn image of the 2018 failure of a United 777’s PW4077 The 2018 failure occurred over the Pacific Ocean, as the 777 was inbound to Honolulu. Both 777s completed first flights within weeks of each other in autumn 1994, according to Cirium fleets data. One incident, on 13 February 2018, involved a PW4077 on a United 777-200 (registration N773UA) of nearly the same vintage as the jet involved in today’s incident. Investigators, aviation safety regulators and aerospace manufacturers have been working to better understand and prevent such failures. In recent years, several jets have suffered uncontained engine failures, which occur when high-energy components fling outward and are not stopped by the containment ring. “Extremely rare engine failures like this prove there is no substitute for experience, and that the most-important aircraft safety system is two well-trained, highly skilled, professional pilots at the controls on the flight deck,” says Todd Insler, a United captain and chair of United’s chapter at union Air Line Pilots Association, International. The NTSB is sending local Denver-area staff to the site to begin an investigation, it says. P&W did not respond to a request for comment. Video of the damaged engine, taken from inside the aircraft, shows the powerplant’s forward cowl section missing, with flames coming from the engine’s mid and aft sections. Parts of an engine from a United Airlines Boeing 777-200 which fell near a house outside of Denver, Colorado on 20 February 2021 Source: Broomfield Police Department / Twitter The failure sent engine debris falling to the ground, with the engine’s nose cowl landing beside a house near Denver. The pilots made an emergency landing back in Denver 25min after take-off. ![]() The right-side PW4077 failed a few minutes after the jet departed Denver, according to reports. The incident occurred shortly after the 26-year-old United 777 (registration N772UA) departed Denver as flight 328 to Honolulu. “It cut through… And the front section… came apart,” he says. Goglia, who has extensive experience studying turbofan failures, sees evidence suggesting the engine’s containment ring – typically made of impact-resistant composite material – did not stop wayward components from exiting the powerplant. Glad everyone onboard is safe #9News /c8TNYlugU2- Marc Sallinger February 20, 2021 Flight was on its way to Hawaii from Denver. Some people told me they said prayers and held their loved ones' hands as they looked out the window. John Goglia, an aviation safety expert and former National Transportation Safety Board member, says images and video of the failure powerplant reveal the incident to be an “uncontained failure”.Ī passenger on United 328 took this video of flames shooting out from the engine. Still, details about the 20 February failure, which resulted in no injuries, are scarce and the investigation remains in the earliest phases. The 20 February failure of a Boeing 777-200’s Pratt & Whitney PW4077 turbofan was apparently an uncontained failure, with images showing damage similar to a 2018 event. Airline Business special: CEOs to watch in 2021.FlightGlobal Guide to Business Aviation Training and Safety 2021.EDGE: A new global force in aerospace and defence.Shell Aviation: What will it take to Decarbonise Aviation?.What does the future of aviation look like in 2022?. ![]()
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