The fate of life is uncertain,

No one knows how long they will live,

When death comes,

You will feel good to be alive.

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I believe everyone should know this news event. "The windshield at a height of 10,000 meters was broken, and the Sichuan Airlines passenger plane staged an epic alternate", which was angered by everyone!

This is not as good as the movie "Captain Sally", and foreign media also reported it for the first time.

On the morning of May 14, when Sichuan Airlines flight 3U8633 from Chongqing to Lhasa was flying at an altitude of 9800 meters over Ya 'an, Sichuan, the front windshield on the right side of the cockpit suddenly burst without warning.

The co-pilot sitting on the side was almost sucked out of the cockpit. In the face of unexpected situations, the crew calmly responded, implemented emergency descent, and finally prepared to descend to Chengdu Shuangliu Airport.

Nine crew members and 1 19 passengers all landed safely.

The windshield of civil aviation passenger plane is a timely material, which usually has three layers, namely, the outer layer, the middle layer and the inner layer, with a thickness of 5-6 cm. Its toughness and compression resistance are two or three thousand times that of ordinary glass, and it can withstand the impact of birds with a distance of about 300 kilometers per kilogram.

A similar incident happened on British Airways Flight 5390 1990, because the captain was sucked out of the cabin because the screw type was not used properly when replacing the windshield.

After the 3U8633 flight incident, the Civil Aviation Administration quickly launched an accident investigation. The current survey shows that:

The right front windshield of the plane and the right third of FCU in front of the cockpit fell off in the air. The model A3 19 is made in France, and the machine age is 6.8 years. No fault record, no maintenance or replacement.

Follow-up investigation is still in progress.

Flight 3U8633 was flying at an altitude of 32000 feet (about 9800 meters).

At an altitude of nearly 10,000 meters, how dangerous is the windshield of the aircraft falling off?

There is a popular science paper on the Internet:

At an altitude of 18000 feet,

The oxygen saturation of human blood will drop to about 73%,

"The human brain will be very painful and will die in about 30 minutes."

At an altitude of 25,000 feet,

The oxygen saturation of human blood will drop to a fatal level,

"People's consciousness can only last 3-6 minutes."

At an altitude of 30,000 feet,

"Human consciousness can only last 1-2 minutes."

The loss of the windshield of the aircraft cockpit has caused great environmental changes.

The unit faces many dangerous situations such as low temperature, low pressure, lack of oxygen, wind noise and control system failure.

Low temperature:

The average temperature in the cockpit is about 24 degrees Celsius.

The temperature will suddenly drop to MINUS 40 degrees,

At this temperature, it is difficult for the human body to stand the test for a long time.

Pressure loss:

The air pressure in the warehouse disappears instantly,

Air pressure is lost and a large amount of air flows out,

The cabin is low pressure, and the pilot directly faces the test of harsh environment.

Hypoxia:

At an altitude of nearly 10,000 meters, the air is thin and the cabin oxygen is limited.

Must descend to a safe height range within a limited time,

Otherwise, you will suffocate due to lack of oxygen.

Wind pressure:

800 kilometers of airflow poured into the cockpit through this hole.

The wind pressure is big enough to blow people out of shape,

It takes a lot of physical strength to operate an airplane.

Noise:

I can't hear anything and I can't talk effectively over the radio.

Calm and decisive, issue 7700 instructions.

(The specific code of the civil aviation distress transponder can be seen through the ground secondary radar.

Information such as position, speed, etc. determined by the identification code).

Control system failure:

The dashboard has been lifted, most of the radios are out of order, and we can only operate by visual level.

The most tense part is the part similar to blind flight, which is completely manual.

In such a complicated and abrupt environment, willpower cannot last long, and people have physiological limits.

Previously, a British airline,

The simulation test of high altitude pressure loss was carried out.

As it turns out,

Students will faint due to lack of oxygen in a short time.

Finally, I couldn't concentrate and fell into a coma.

Liu Chuanjian is the responsible captain of flight 3U8633. He was calm in the alternate flight and was called the "hero captain". He used to be a flight instructor in the Second Academy of the Air Force and has more than 20 years of flight experience.

Xu served as the co-pilot and the second captain of the flight, Bi Nan was the flight attendant at that time, with 1 1 year flight experience, and Wu Shiyi was the flight safety officer, responsible for maintaining passenger order.

According to their memories, let's take a look at the whole process from starting to escaping.

At 7: 08 am on May 14,

Liu Chuanjian and Xu are sitting in the co-pilot seats on the right.

At the same time, I heard a loud noise and an explosion.

The two were stunned by the sudden situation in front of them.

The front windshield of the plane was broken.

At this point, the plane has been flying for 42 minutes.

Cruise at an altitude of 9800 meters above the ground,

At this time, the height must be lowered to reduce the pressure inside and outside the cabin.

When Liu Chuan was founded, he adjusted the lower height of his nose.

At the same time, apply to the tower to reduce the height of the plane.

Return to Chengdu Airport, alternate distance 150km.

At this time, the accident happened again.

Just as Liu Chuanjian's voice just fell,

The windshield exploded completely,

This is what they didn't expect.

Liu Chuanjian recalled: "It exploded three times and there was no response at that time."

At this moment, the co-pilot Xu has been sucked out of the cabin.

Hanging the upper body out of the window is do or die.

At this time, the wind speed is about 800 kilometers.

The plane descended sharply at the corner.

The strong wind blew on my face, and I felt torn and deformed.

Liu Chuanjian has no time to think. He just wants to control the plane so that it doesn't fall.

In fact, at that time, Liu Chuanjian also panicked "finished, finished."

But the situation at that time was not what he could think about.

He still tried his best to control the plane from falling, otherwise it would be really finished.

The whole plane rocked violently after the windshield broke.

Strong winds suddenly poured into the engine room and overturned some parts of the console.

The control panel in front of the cockpit has fallen off by a third, and the autopilot system has also failed.

The crew's clothes were torn by the wind and almost torn into strips.

The captain's hands were frozen stiff.

At the same time, Peng Liang, the second captain on standby, also found that the situation was not good and entered the cab to give assistance.

Peng Liang rubbed the captain Liu Chuanjian's back with his hand, giving him temperature, comfort and encouragement. At the same time, he commanded the co-pilot Xu to supervise the 7700 instruction and ensure that the ground tower received it.

At this time, the crew and passengers in the cabin don't know what happened.

However, the door connecting the cockpit and the cabin was blown open by the wind, making a whistling sound. The plane rocked violently and descended rapidly, and the oxygen mask suddenly fell off, which frightened other passengers. Someone was crying and screaming, and the cabin was filled with suffocating tension.

Please trust us, we will send you to your destination safely.

This is what flight attendant Bi Nan said to the passengers.

Calm and professional, she still broadcasts to passengers in a sweet voice, instructing them how to use oxygen masks correctly and how to maintain a safe posture. Don't panic and follow their instructions.

At the time of the incident, Wu Shiyi, a security officer sitting in the third row, closely monitored the passenger's reaction to prevent the passenger from losing his balance and getting up in a panic. Every flight attendant in the crew is doing his duty to appease the passengers.

Passengers recalled 20 minutes of shock:

Passenger 1 recalled: "Nearly an hour after the plane took off, the plane that had been flying smoothly suddenly bumped violently, and then a powerful airflow blew in, which made people unable to open their eyes like a sandstorm, and the cabin suddenly became dark. There were passengers screaming and screaming around, the plane dropped rapidly, and many items were blown to the ground of the cabin. "

Passenger 2 recalled: When forced to land, my ears were particularly painful. I thought I was bleeding. When the accident happened, I was serving food and everything in the dining car turned over.

Passenger 3: Suddenly the light went black. The stewardess and the trolley flew into the air and fell down. Hearing a bang, the plane quickly descended and all the lights went out. Platoons dropped oxygen masks.

Passenger 4: We were having dinner when we heard a loud noise, and then the plane descended rapidly, which lasted about 4 to 5 seconds. Then after 2 minutes, all the lights suddenly went out.

Passenger 5: The plane dropped sharply for 45 seconds, and then after two minutes, the crew comforted us and told us not to panic. Trust them, they have the ability and confidence to handle it.

Dinner was being served when the incident happened, and the dining car fell down. Lunch boxes, water and rice are in a mess, and the corridor is full of rubbish.

A passenger who asked not to be named posted a long microblog, which restored the situation on the plane.

At that time, the plane was on the southeast edge of the Qinghai-Tibet Plateau. Because there are many mountains in this area, the mountain height is mostly 5000-6000 meters. The plane can't fly near the top of the mountain, it must have a safety margin of at least 600 meters.

Once the engine room loses pressure, the minimum safe altitude must be kept at about 7300 meters, that is, 23000 feet.

It means that the plane with lost pressure in the cockpit cannot descend to the height with oxygen and suitable temperature at one time. The pilot must grit his teeth and continue to fly at an altitude of more than 7,000 meters, that is, 23,000 feet, until he flies over the mountains and reaches the basin before descending again.

Fortunately, I didn't enter the Qinghai-Tibet Plateau at that time, and the weather was good, so I could control the plane.

In less than a minute, the plane will descend to a relatively safe aerobic area, 10000 feet, which is below 3000 meters above sea level. If it is over the Qinghai-Tibet Plateau, the plane cannot descend quickly, and the consequences are unimaginable.

Fortunately, the cockpit and cabin are separated, and passengers have not encountered extreme situations except for a short weightlessness.

Fortunately, twenty or thirty seconds after the windshield burst, Xu Shunfeng, the co-pilot who was sucked out of the cab by a strong pressure difference, climbed into the cockpit.

With the calm control of the captain, the professional cooperation of the crew and the cooperation of the ground monitoring department, finally, everyone on board landed safely.

Among them, the co-pilot was slightly injured, and a flight attendant was injured because of waist impact on the dining car.

Peng Liang: "The two of us, he leaned over and we watched. We shook hands and said that we are still alive. "

Liu Chuanjian: "There was a long sigh of relief when the plane landed. He and I were there at the same time, and we were all alive. "

"We are alive" is the first sentence they can hear.

After the plane stopped, many people collapsed. At first, some people shouted, some people cried and some people fainted.

These are all mixed feelings for the rest of my life. It's good that I'm alive.

Only after experiencing life and death can we truly appreciate the beauty of living.

end

Smell the warmth of the world and talk about the temperature of the heart.

Wish you were here.

There are poems and distant places in the life of daily necessities.