At two o'clock in the afternoon, Russia arranged for cars to take the American and Chinese investigation teams and search and rescue teams to the scene of the accident, a mountainous area only more than ten miles away from Gongqingcheng.
The mountain is not very high in altitude. It is more like a slope than a mountain. However, the mountain is covered with dense forests and thorns, which is very unfavorable for search and rescue and accident investigation.
The entire process, from the malfunction of the plane to the crash, took only one or two minutes. It was night and there were no witnesses, but from the direction of the plane's crash, the Russian experts were able to analyze the captain's intention.
He temporarily changed his route and flew towards Komsomolsk-on-Amur, intending to crash in the sky above Komsomolsk-on-Amur.
He is truly a great hero of the United States!
But there is no doubt that Russia has objections to this.
Right now, the most important thing is to find the black box.
The correct name of the black box is flight data recorder. It is called a black box, but in fact, for the convenience of search and rescue, its color is bright orange. It is used to record various parameters of the aircraft during the flight, as well as conversations between the pilot, crew members and various towers.
Once a plane crashes, as long as the black box is found and the various recorded data are read out, it can help technicians analyze the cause of the aircraft malfunction or crash.
In later generations, airplanes were equipped with two black boxes, one cockpit voice recorder and the other flight data recorder, but airplanes of this era only had one black box to record flight data.
Of course, not every organization has this reading ability, and usually only aircraft manufacturers have the ability to read it.
Therefore, the United States accuses China of purchasing machine tools and computers but being unable to dissect their key structures and demanding returns and compensation, which is actually unreasonable.
After all, that's how they do it themselves.
It started to drizzle and the temperature dropped significantly. This place borders the three northeastern provinces and belongs to the Far East of Russia. The temperature is slightly better than Siberia. The lunar calendar has entered September. In another month, people in the three northeastern provinces will start to hibernate.
Before the Chinese arrived, they had made preparations. Everyone wore a military coat and a cotton hat that covered their ears. Although their movements were very clumsy, at least they did not suffer.
But Americans are not so lucky. As soon as they go out, they are freezing. They cannot work in such a harsh environment. Moreover, it is basically unlikely that there will be any survivors in a plane crash.
It is impossible for the Russians to provide clothes for Americans. They can only send them to the mall to buy clothes first.
This process took another half a day.
It was already the next morning when we arrived at the search and rescue site.
The black box was found three days later. Before that, search and rescue teams from three countries collected a lot of aircraft debris, among which the Chinese collected the most debris.
Every time they collected a piece of debris, they would make a record, working diligently. If you didn't know, you might think that the crashed plane was a Chinese plane.
After completing the search and rescue work every day, the members of the accident analysis team would gather together for a meeting to exchange their experiences. After three days, combined with the training that Ji Xia had given them, they gained a lot.
"Teacher Ji once said that handling an accident analysis is more meaningful than sitting at home drawing designs for a year. I didn't understand it before, but now I truly feel it." Luo Xinbing said with emotion.
He is forty years old and works in materials research. He is also very clear that if it weren't for the class that Ji Xia gave them that night, even if he participated in this accident investigation, he would not have gained so much.
How can we analyze the accident if we don’t know anything about the 737 aircraft?
"What do you think is the cause of this accident?" Qi Mantang asked curiously.
Everyone in the room looked at each other, everyone wanted to know the answer. Everyone had an answer in their hearts, but without sufficient theory to support it, no one dared to say it.
"I don't know about that. The Americans sent the black box back to the United States for analysis. What does the flight data inside the black box show?"
Resonance is a very rare fault phenomenon, but every part of any machine has its own natural frequency. How to avoid resonance is the first defect that designers must avoid.
Resonance is also a very powerful machine killer.
Ji Xia's bet was that the captain would never have thought that the engine would resonate with the fuselage when flying at high altitude when the resonance occurred for the first time.
An experienced captain might notice this, but it takes a process. In this shortest process, the resonance has already damaged the engine.
Before they died, Watson and others thought that the first thing that would collapse would be the fuselage. In fact, the 737 aircraft itself had a design flaw called the pickle fork crack. This was an important structure connecting the wings and the fuselage. Its design strength was 90,000 takeoffs and landings, but its actual strength could only support 30,000 takeoffs and landings.
Once resonance occurs, the first part to be damaged is here; the second part is the engine. However, the engine will definitely fall apart in the end, and it is hard to say whether the fault point can be found.
The next day, on the fourth day of search and rescue, the Chinese accident team found the kimchi fork structure they had been paying attention to and witnessed the cracks with their own eyes. Before, they had only looked at drawings, but seeing the real thing was more intuitive.
The crack was very obvious, and the Chinese took photos immediately. Annie was at the scene when the photos were taken. She completed this task with a pragmatic attitude, but others did not.
As soon as David came over and saw the crack on the pickle fork, he felt something was wrong. At this time, Qi Mantang was still taking pictures from various angles and discussing with others whether this was the cause of the crash.
This reminded David, and he grabbed all the cameras in the room, shouting angrily, "No photos! This is an American plane!"
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