On December 3, an Airbus 330 passenger plane of China Eastern Airlines was flying flight MU721 from Shanghai Hongqiao to Hong Kong, and the flight had landed safely at Xiamen Gaoqi Airport at 9:59 on the same day, and there were no personnel in the accident. The exact cause of the failure has not yet been announced. According to the analysis of aviation experts, it may be that the left engine of the aircraft failed due to the impact of a foreign object on the blades.
*Shows that 3 blades of the engine on one side of the aircraft are broken.
Flight records show that at around 9:30 on December 3, when the plane was traveling to Zhangzhou, Fujian, the engine had a sudden accident, and the flight altitude was 10,400 meters. According to footage taken by passengers, the cabin shook violently at the time of the incident. Then the plane began to make an emergency descent.
Some passengers reflected, "Before breakfast was finished, I suddenly heard a loud noise on the left, and then the fuselage shook violently, accompanied by a strong smell of burning." The coffee and tea shook and overflowed. He asked the passenger who was sitting near the left-hand porthole if the engine was on fire, and was a little more "relieved" when he heard the answer "no". Some witnesses recalled that the first time the plane shook at that time, I thought it was touching the air current, but then I smelled a burning smell, and the plane began to shake violently again. The flight attendant's voice was also a little trembling when he announced. "I panicked, and at that moment I couldn't do anything, so I sat there trembling and begged to live. ”
Another witness, @小小苏, said that the violent shaking of the plane lasted for about 20 minutes and landed safely, "when cold sweat broke out on his hands and feet." During this period, there was an obvious sound of shaking and collision in the plane seats and luggage racks, "more than a dozen passengers were crying in fright, and some had already begun to write suicide notes." ”
At 09:59 on the 3rd, the plane finally landed safely at Xiamen Gaoqi Airport, some passengers described, the whole plane applauded, and the passengers were arranged to the waiting room to wait for the arrangement after getting off the plane. There were quite a few people sitting in their seats, apparently still unrelieved. "After getting off the plane, I went to the bathroom and cried. ”
Subsequently, a passenger posted a ** suspected of being involved in the aircraft, showing that three blades of the engine on one side of the aircraft were broken. The reporter called China Eastern Airlines to inquire about its authenticity, and the customer service said that it had not received the relevant notice yet, and it could pay attention to the relevant official notice in the future. According to the flight, the aircraft is an Airbus A330-343 passenger aircraft with registration number B-8970 and an age of 6For 5 years, it was equipped with two Rolls-Royce Trent 700 engines.
Some aviation people proposed that according to the judgment of **, there should be no blood stains (traces of bird strikes) in the engine, and when the failure occurred, the aircraft was at cruising altitude, not the take-off and landing stage where bird strikes usually occurred. It is also possible that the blade will experience metal fatigue, which can lead to fracture. Installation and repair blades can also crack without calibration.
Professor Sun Youchao of Nanjing University of Aeronautics and Astronautics told reporters that generally speaking, the lack of a blade in an aircraft engine is already a very serious situation, and two or three pieces of damage at the same time may be caused by the blades rotating at high speed and causing mutual damage. There are also cases where the blade itself fatigues, cracks, and fractures at high altitudes, but generally speaking, the possibility is not too great, and it is believed that it has been hit by a foreign object, and the specific cause depends on the final official investigation results. Generally speaking, even one engine can fly safely after a single engine failure of an aircraft.
*: Yangtze Evening News.
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