Airlines worldwide have grounded their Boeing 777s after a United Airlines flight in Denver recently suffered from an engine failure.
The plane departed Denver International Airport for Hawaii and was carrying 231 passengers, before it was forced to return to Denver airport one engine failed shortly after take-off.
The engine failure also caused the plane to scatter engine debris across Denver suburbs causing property damage but no injuries.
In response to the incident, United Airlines announced that it was temporarily grounding all 24 of its Boeing 777s while Japan Airlines (JAL), Korean Air (KRX), and All Nippon Airways (ANA) implemented similar measures for their 777s that use the Pratt & Whitney PW4000.
Boeing said 128 aircraft with PW4000s should be grounded and the FAA issued an emergency order saying it would be inspecting Boeing 777s equipped with the said engines.
“While [an] investigation is ongoing, we recommended suspending operations of the 69 in-service and 59 in-storage 777 aircraft powered by Pratt & Whitney 4000-112 engines,” said Boeing.
FAA administrator Steve Dickson said that they have reviewed safety data and that some airplanes will be removed from service because of the hollow fan blade defect.
The US National Transportation Safety Board (NTSB) said the engine failure was caused by cracked fan blades.
The NTSB added that it will also review the flight data and cockpit voice recorders after sending specialists to Denver.
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