After the crash of a Boeing 777, which had to return to Denver airport after the engine explosion, United Airlines landed all 24 of its aircraft. They also responded immediately in Japan, where authorities called on all airlines that own a Boeing 777 with the same engine, the Pratt & Whitney PW4000 engine, to keep those planes on the ground.
United Airlines said it had grounded all 24 Boeing 777s after one of them crashed on Sunday after takeoff. According to the U.S. Federal Aviation Administration (FAA), United Airlines is the only U.S. airline to fly this type of aircraft, with the rest used in Japan and South Korea.
As a result of the accident, Japan also decided not to take off, land and do not fly such Boeings over their airspace. Therefore, the government there ordered the airlines JAL and ANA to land all their 777 aircraft with the same engine immediately.
Boeing said that they support Japan’s decision and that they themselves, during the investigation of the unfortunate event, recommend the suspension of all flights of such Boeings. The manufacturer also said that 69 Boeing 777s are currently in use worldwide with the Pratt & Whitney PW4000 engine.
The plane, which had 231 passengers and ten crew members on board, had to return to Denver Airport due to an engine failure. On a plane flying from Denver to Honolulu, the right engine exploded after takeoff, when the plane reached 3,000 meters, and most of the exterior protective parts fell on the neighborhood. No one was injured, the plane landed safely 23 minutes later.
The FAA accidentally ordered additional inspections of Boeing 777 aircraft equipped with the same engine. “Based on the original information, we decided that the compression fan blades in the engine should be further inspected,” he said Steve Dickson from the FAA. The Federal Aviation Administration will meet with Boeing, but as they say, the failure occurred in the right engine, where two fan blades broke, and the main part of the plane suffered only minor injuries.
The blades of the compression fans in the engine also rotate at 20,000 rpm during the flight, so the centripetal forces are huge and the blades are therefore mostly made of titanium. But in the past they have already given way and are flying at a considerable speed perpendicular to the torque. They also damaged the fuselage and passengers, so it was precisely because of such incidents that they began to build engines in such a way as to delay such a failure of the blades.
The frightened passengers on the plane described the events shortly after take-off as a nightmare, as there was a strong fear on the plane. It started with “big bang”, and then it followed “violent shaking”. “The plane started to shake violently, we lost altitude and the plane started to ‘fall’,” he said David Delucia. He added that he and his wife searched for wallets and put them in their pockets, yes “it would be easier to identify us if we crashed”.
After the accident, police in the town of Broomfield posted pictures of the front of the engine case landing in the backyard of an apartment building. Elsewhere in the city, engine fragments were also found, some of which flew onto a football field. Otherwise, because of the particles, “falling from the sky”, no one was injured, they said.
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