A clear sky bump that has not been encountered in more than twenty years
China Southern Airlines red kapok logo
At 13:14 on May 10, 2012, a Boeing 777-200 aircraft belonging to China Southern Airlines (civil aviation registration number b-2054, delivered to China Southern Airlines on December 5, 1996, The flight was nearly 15.5 years old on the day of the incident, belonging to an old plane) took off from the rainy Guangzhou Baiyun International Airport, which was to be operated on the same day as flight cz3525 (departing from Sanya at 9:30 a.m.) from Sanya Phoenix International Airport to Shanghai Hongqiao International Airport. There were a total of 258 passengers on board (259, presumably because a 10-month-old infant did not occupy a seat), and the number of crew/crew/security group is unknown. Among them, captain Qi surnamed Qi is a senior captain with 25 years of flight qualifications, and the director purser surnamed Mei is also a senior flight attendant with 28 years of flying qualifications. The no.1 of the flight crew and the crew are highly qualified, so the flight crew and crew team are lean.
Guangzhou Baiyun International Airport overlooking, photo: xover
China Southern Airlines painted B-2054 Boeing 777-200 airliner, photo: priceyang
At 13:30, the aircraft passed through the cloud and rain area, climbed to a cruising altitude of 25,000 feet, the crew opened the autopilot, set the automatic throttle, released the shoulder straps and began to enter the "nagging mode" (the aircraft in the cruise stage is in accordance with the established route set by the computer to fly to the destination, the pilot in addition to the timing of the monitoring instrument basically has nothing to do, the general way to pass the time is to chat, before the 911 incident passengers can even enter the cockpit and chat with the crew, After 9/11, for safety reasons, this behavior was largely eliminated; the crew also released their seat belts and got up from their folding seats, pulled out the dining car from the catering area, and began to serve lunch and drinks to the passengers in the cabin, as usual.
Inside the cabin of Aircraft B-2054, photo: pohuang32
Inside the cabin of Aircraft b-2054, photo: Cats
About 25 minutes after flight cz3525 took off, the plane flew into a turbulent area (the weather situation in Guangzhou at that time was moderate rain and accompanied by strong convective weather), the fuselage was affected by turbulence and began to bump, and the crew turned on the seatbelt warning light according to the plan, prompting the crew to be prepared to deal with turbulence.
Two rapid call bells flashed twice in a row with all the "seatbelt lights", and the purser's radio rang out: "Ladies and gentlemen: attention! Due to the impact of airflow on the route, our aircraft is bumping, please take your seat as soon as possible and fasten your seat belt..."
After hearing the broadcast, the flight attendants who were delivering meals and drinks packed up the food trucks and prepared to pull the food trucks back to the dining area (some flight attendants could not interrupt the action because they were delivering meals or delivering drinks to passengers). But about halfway through the purser's broadcast, the plane's turbulence intensified.
The director of the factory drew a second view of the B-2054 Boeing 777-200 passenger aircraft painted by China Southern Airlines
Safety officer Zhao Yiming just finished the cabin inspection and returned to the front service desk, after hearing the purser's broadcast, out of instinctive reaction, he immediately sat down on the folding seat of the flight attendant at the first door on the right side of the plane, when he had just fastened the shoulder strap of the flight attendant's split seat belt, and when the belt was not yet fastened, a situation that no one expected appeared...
At 13:40, Flight cz3525, which was bumping in turbulence, suddenly and without warning, suddenly and rapidly fell, a process of more than 10 seconds (including a momentary pause in the plane's descent process). The crew hurriedly cut off the autopilot and tried to grasp the joystick to try to stabilize the aircraft, and then the aircraft suddenly made a lifting motion and stabilized the flight posture after 5 seconds of sharp fall.
The sudden state caught the people on the plane by surprise, and the passengers in the cabin who did not have time to wear seat belts and the flight attendants who were cleaning up the dining car were involuntarily thrown up, crashed straight into the ceiling of the cabin, and then fell back to the cabin floor or seat when the plane came to a standstill.
This set of "Captain China" stills can be a good performance of the cabin scene when Flight CZ3525 crashed
According to the passenger "janks" (Weibo netizens) on the plane: "Today, May 10, Guangzhou to Shanghai, about half an hour after take-off, suddenly fell, passengers without seat belts and flight attendants who were delivering meals flew up in the cabin and hit the ceiling. The drink floated in the air in a weightless state, and suddenly there was a pause, people and things were smashed down, the drink leaked all over the cabin, and the lunch box dining car magazine and newspaper were scattered everywhere. The plane fell again, and the centrifugal force made me feel the feeling of death for the first time. The only thought in my mind is that I am finished, that my relatives and friends may never see each other again, and my heart is repeating, and the thought of dying is simple. Then the plane jerked upwards and pulled back, like a feeling of hitting the ground. For some time afterwards, I was not sure if I had escaped the threat of death, and the sense of fear began to linger. ”
Professor Hou Jinlin, director of the Liver Disease Center of the Southern Hospital of Southern Medical University who took flight CZ3525, recalled: "At that time, the flight attendant was delivering drinks, tea and so on were all spilled on the luggage compartment, the whole process lasted for about ten seconds, and a passenger behind me was scared and had some heart problems. ”
Details of the B-2054 Boeing 777-200 aircraft painted by the director of the factory 1
Details of the B-2054 Boeing 777-200 aircraft painted by China Southern Airlines by the director of the factory2
Passengers also recall that during the crash, the drink in the cup in their hands "flew up like advertised", and they generally recalled that there were two times during the crash (among which was the short pause), the first time was longer (early 10 seconds), the second time was shorter (less than 5 seconds), and the people who were thrown up "floated like weightless in the space capsule." ”
After more than ten seconds, the plane's flight attitude finally returned to normal. The cabin crew and the security team immediately began to patrol the cabin, according to the recall of the safety officer Zhao Yiming: there were 2 flight attendants and 1 passenger in the first class who were slightly injured because they could not wear seat belts, the porcelain tableware and glassware in the first class were broken, and the director of the purser surnamed Mei suffered three abrasions on the head, left arm and waist, but she had no time to deal with her own wounds, and immediately called the service areas to inquire about the situation, and when she got a report that there were passenger injuries in the rear service area, After confirming that the injuries of the two flight attendants in the first class did not affect the operation, the purser instructed them to stay in the first class to reassure the passengers in the area and take care of the injured first class passengers before going to the rear cabin to verify the situation. Security officer Zhao Yiming saw the first class cabin full of broken porcelain pieces and broken glass, in order to prevent people from being hurt by them twice, immediately put on gloves and carefully put them into garbage bags (soon cleaned a large bag).
After the sharp drop in the cabin, lunch boxes and drinks spilled on the ground, Yangcheng Evening News
After the crew took control of the aircraft, Captain Qi opened the cabin broadcast to explain the situation to the passengers: Our aircraft suffered a bumpy landing in the clear sky, the crew has successfully disposed of it, the current aircraft performance is good, the flight is stable, all the flight attendants have received good emergency response training and medical rescue training, and will certainly provide everyone with help within their capabilities. Captain Qi also apologized to the passengers on the radio, saying that he had never encountered such a situation in his 25-year flying career.
After the captain's broadcast (at this time, the crew can be called professional to push all the dining carts to the dining area to be fixed, and all the non-fixed items in the catering area are stored in a fixed position to prevent similar situations again), Purser Mei asked the cabin through the purser radio whether there were doctors and nurses among the passengers, and if there were passengers injured and needed help, Professor Hou Jinlin, mentioned earlier, and Wang Xinliang, deputy chief physician of the Joint Department of the Guangzhou First People's Hospital sitting in row 63, responded to the call to help the crew to treat the injured passengers first aid. Regardless of the fact that some of the crew members were injured (a total of 3 flight attendants including Donald Mei were injured), they took out all the emergency medical kits and first-aid kits on the plane and treated the injured passengers, and after examination, a total of 8 passengers were injured to varying degrees, of which 2 were fractured (1 was fractured in the right arm, 1 was fractured in the cervical vertebrae), and the other 6 were abrasions to the head or face (and 1 young woman whose arm was knocked out of the dislocation was successfully reset by Dr. Wang Xinliang), and the injured passengers had one thing in common - all of them did not wear seat belts Except for 1 female passenger who just went to the bathroom and did not have time to return to her seat, the other 7 were sitting in the seat without a seat belt (the director of the factory could not sympathize with them - didn't your mother teach you to wear a seat belt on a plane).
While the crew treated the injured passengers, the crew contacted Hongqiao Airport at 14:22 and reported that the plane had suffered a bumpy and sharp landing, and that control of the plane had now been restored, and that someone in the cabin had been injured (11 people were reported) and needed ambulance and medical emergency services after landing.
Scenes in the cabin after the crash of Flight cz3525 and the treatment of injured passengers by doctor passengers
After receiving the report, the Hongqiao Airport Operation Command Center immediately launched the emergency treatment plan for passengers, and organized 4 medical emergency vehicles and medical personnel to stand by on the apron.
At about 14:30, the cabin order of Flight cz5352 returned to normal, and the crew (including the flight attendants who were slightly injured and could not get out of the line of fire) cleaned up the cabin and re-launched the dining car as usual, providing drinks and snacks to passengers again (meals were "reimbursed" for the most part in the bumps), showing a high degree of professionalism and professionalism. Thanks to the efforts of the cabin crew and the security team, the passengers' original uneasiness was quickly calmed.
Overlooking Shanghai Hongqiao International Airport, photo: shane333
At 15:10, that is, 90 minutes after the flight, China Southern Airlines flight b-2054 Boeing 777-200 passenger plane B-2054 landed safely at Shanghai Hongqiao International Airport, the destination of the trip, after the plane was stopped, the medical emergency personnel checked the passengers for the first time, and quickly sent 8 injured passengers to the Changning District Central Hospital for treatment. When the passengers left the plane, Captain Qi walked out of the cockpit and the crew to drop off the passengers and apologized to the passengers.
At the Central Hospital of Changning District, China Southern Airlines paid for the treatment of the injured passengers and issued a transportation subsidy of 150 yuan to each injured person who left the hospital (the injured passengers said that China Southern Airlines did not compensate for the accident on the spot yesterday). As of 21:00 that night, except for one male passenger with a cervical vertebrae fracture surnamed Ling, who was still in the hospital for observation, the others had been discharged from the hospital.
On the day of the incident, a male passenger surnamed Ling surnamed Ling who was hospitalized at the Central Hospital of Changning District was observed
Entrusted by the Civil Aviation Administration of China, the East China Administration of Civil Aviation was commissioned to investigate the accident.
Based on the descriptions of the situation by the flight data recorder and the crew/crew and passengers, the investigation team preliminarily judged that the aircraft may have encountered a clear sky bump, which, if true, is force majeure (the official investigation results are unknown).
Clear sky bumps are clear skies without clouds, due to the turbulence caused by changes in wind speed and direction, due to the current design principle of aircraft weather radar can only detect the water vapor content in the air, clear sky bumps before the weather radar is not detectable.
Clear sky turbulence is the most common and most dangerous weather phenomenon that endangers flight safety in civil aviation flights, because there is no visible weather phenomenon such as clouds, and it is difficult for flight crews to find and avoid bumpy areas in advance, known as "flight killers" (flight accidents caused by clear sky turbulence occur every year in the world). Therefore, the current forecasting and prevention of turbulence in clear skies is a difficulty and focus of the civil aviation community.
Details of the B-2054 Boeing 777-200 aircraft painted by China Southern Airlines by the director of the factory3
The director of the factory drew the details of the B-2054 Boeing 777-200 passenger aircraft B-2054 of China Southern Airlines
The b-2054 Boeing 777-200 continued to operate in the Fleet of China Southern Airlines until the end of 2016, and was officially withdrawn from Urumqi Diwopu International Airport on January 1, 2017, with a total operating time of 21 years.
Today's flight cz3525 cancels the Segment from Sanya to Guangzhou and only operates the Guangzhou-Shanghai segment, operated by an Airbus A350 aircraft.
B-2054 machine performance data
Model: Boeing 777-200
Designed by: Boeing Aircraft Corporation
Occupants: 2+1+305 passengers
Length: 63.7 m
Wingspan: 60.9 meters
Height: 18.5 m
Empty weight: 139225 kg
Maximum takeoff weight: 247210 kg
Engines: Two Ge Electric ge90-85b turbofan engines with a single thrust of 338 kN
Economic cruise flight speed: 905 km / h
Practical ceiling: 13140 meters
Maximum capacity range: 6020 km