Large aircraft manufacturers have set up special "ground aircraft groups" to deal with various types of aircraft accidents.
From minor aircraft maintenance to major air crashes, all are handled by professionals on the ground.
After the Emirates 411 crash occurred 23 years ago, Boeing, as an aircraft manufacturer, of course sent a professional on-site investigation team to investigate the crash together with NTSB and GCAA. But this time, they did not send anyone, but communicated with the investigation headquarters online to provide technical support.
At 4:00 p.m. Dubai time, or 7:00 a.m. Chicago time, the Emirates 411 investigation headquarters and Boeing's ground plane team began a video conference.
It was a long meeting, and Zhuo Huan asked Su Fei to send all the data of 124 experiments to Boeing.
After Boeing received the email, it immediately arranged for a laboratory to process and analyze the experimental data. Boeing has one of the most advanced aeronautical laboratories in the world. Therefore, after obtaining the experimental data, it only took them 40 minutes to prepare the experimental materials, build and design related equipment, and start the reverse confirmation experiment.
On the projection screen, the gray-haired person in charge got the data from the laboratory, and his face gradually became ugly. He flipped through the documents, raised his head, and said: "For the internal explosion of the wing fuel tank, the experiment on the outer skin of the flap damaged by the shock wave has ended. In one of the three experiments, the outer surface and the inner steel structure were successfully peeled off. But Mr. Patrick, I It is not believed that this will affect the normal operation of the aircraft."
Zhuohuan looked at him: "Tell me."
The Boeing staff said: "We have also heard about the new witnesses on Emirates 411. Your experiment can reasonably explain what happened to the 'flap fragments' seen by the witness. But The skin on the outer surface of the flaps and the engine fan, those are two different things."
"The wing skin of our Boeing 777 is made of super duralumin material, which is extremely resistant to compression. The flap part is made of fiberglass structure. It was confirmed in the experiment just now that the fuel tank exploded inside and could be destroyed. The glass fiber reinforced plastic of the flaps makes the super duralumin material peel off from the wing. But this does not mean that the fan blades inside the engine will also be shattered by the shock wave."
The person in charge of Boeing ordered his subordinates to transmit the video taken during the experiment just now to the screen.
"Mr. Patrick, fellow investigators, please look. Boeing, of course, does not cheat or use inferior materials when making aircraft. But the wing material and engine material are still incomparable. The fan blades of the engine are called ' The jewel in the crown', it is the most vital part of an engine. Rolls-Royce's Trent 800 engine, the turbine blades it uses are made of micro-laminated composites... ”
Physical data, experimental videos, photos of material fractures...
The person in charge of Boeing's ground flight team methodically presented the evidence one by one in front of everyone. He spoke eloquently and confidently. His confidence comes from his trust in Boeing aircraft and Boeing laboratories.
At the end, he concluded: "It is true that the explosion inside the fuel tank may cause the skin of the flaps to fall off, which has been confirmed by you. But Mr. Patrick, I must regret to tell you that such an explosion equivalent, such a shock wave , it is absolutely impossible to destroy the fan blades of a Trent 800 engine! No matter how close they are, it is absolutely impossible."
After reading all the information, Zhuo Huan raised his head: "Before today, did you ever think that the internal explosion of the Boeing 777 wing fuel tank can shatter the skin of the aircraft, but it has no other external manifestations at all?"
The person in charge of Boeing was taken aback. He was silent for a moment, then said, "I haven't thought about it."
Zhuo Huan chuckled, "Air crashes are made up of countless coincidences. Never say the words 'impossible' to an airplane."
There was a few seconds of silence in the video conference.
Fu Cheng raised his head and looked at Zhuo Huan's back.
Zhuo Huan leaned on the table, turned his head slightly, and looked at the Boeing staff on the projection screen with an indifferent expression. Everyone thought that what he said to Boeing was a warning and a reprimand. But for some reason, looking at his back, Fucheng suddenly felt... His words may also be said to Maifei F485.
Fu Chengdao: "Mr. Zhuo, there is news from Lovins."
Zhuo Huan turned to look at him, his eyes met, and he asked: "The experiment went well?"
Fucheng nodded lightly: "It went very well. He is packing the experimental data and sending it to UAAG's mailbox..."
"Received the email!" Su Fei cheered excitedly, and said to Zhuo Huan: "RIP, do you want to decompress the data directly now?"
Zhuo Huan: "Project it on the screen." After a pause, he raised the corners of his lips: "By the way, send a copy to Boeing by the way."
The face of the person in charge of Boeing changed slightly, and he keenly sensed something strange.
Five minutes later, dense experimental data and line graphs were projected on the big screen. The person in charge of Boeing frowned, looking at the data. The more he looked, the heavier his heart became.
Zhuo Huan put his hands in his pockets, and said lightly: "Twenty-three years ago, neither the NTSB laboratory nor the Boeing laboratory could prove that the fan blades of Emirates 411 became fragments. Now, in Under the premise of proposing the explosion shock wave, the cross-section detection experiment will be carried out... "
"It turns out that air crashes are made up of countless coincidences."
At the same moment, Washington, USA, NTSB headquarters.
Lovins submitted the experiment report to Deputy Director Andrew.
Levi Andrew's eyes quickly swept across the black English letters. His eyes were calm. After reading the not-so-long experiment report, he looked up at his confidant subordinates: "Sure enough, there is still chance."
Lovins couldn't hide his joy: "Yes. Normally, with the strength of the fan blades of a Rolls-Royce engine, even if it encounters an explosion shock wave at a very close distance, it is impossible to break. The explosion shock wave that can break it, It must be able to directly destroy the wing of the plane. However, Director Andrew, the assumption you made 23 years ago is not wrong. The reason why this broken fan blade breaks is because some of its material has appeared. A special accidental change. This special change is very accidental. Maybe it will be discovered during the next engine maintenance inspection. But unfortunately, it was an air crash that found that its material was damaged. "
At the same time, the staff of the Boeing ground plane team fell silent after seeing the experimental data.
However, they still decided to apply to the NTSB for a few fragments of the fan blades of Emirates 411 and conduct another experiment. But right now, they don't say anything.
No one at UAAG has a problem with that.
After the video conference, Old Joseph spread his hands and said, "Big companies are always like this. No matter what, you only believe in yourself. You have to witness it with your own eyes before you believe it."
Lina smiled slightly: "I agree with you, old Joseph. The same is true of Mai Fei. But this is not just because of their distrust of other organizations, but more of their trust in their own quality. And this trust , It is based on thousands of experiments. For example, Maifei F485, before it was designed, each part of it has undergone at least 1,000 experiments."
"It's 1316 times."
Lina turned to look at Zhuo Huan: "Reid?"
Zhuo Huan exerted a little force to stand up straight. He looked at his friend, chewing gum, still looking like the whole world owed him 10 billion. "The 1316 experiments were the oil quantity sensor of the aircraft. Because it basically continued the settings of the McFly F475, there was no improvement."
Lina smiled and said, "Okay."
The two-month accident investigation has come to an end, and only the final accident investigation report remains.
Zhuohuan: "Fucheng, this time you will write the investigation report."
Fu Cheng was taken aback for a moment, he looked at a certain man: "Okay."
Old Joseph said in surprise: "V, although the cause of this air crash report is clear, many places have been designed with very professional experimental problems. Can you?"
Fucheng smiled: "No problem."
Old Joseph laughed: "I'm just talking casually, even if you ask me for help, there's nothing I can do."
There are generally two types of aircraft accident investigation reports that UAAG participates in.
Zhuo Huan personally wrote the accident report for accidents that were too professional and required extremely high experimental requirements, such as Japan Airlines 917.
There are no overly strict professional requirements for the cause of the air crash, and anyone else can write it, such as American Airlines 4012 written by Joseph Sr.
This is not to say that Fu Cheng and others cannot write a professional air accident investigation report, but it is handy for Zhuo Huan, and he does not need to think at all. Others may need to spend a certain amount of time sorting out the experimental data.
The JAL 917 incident was due to the influence of electromagnetic waves on the MCD magnetic chip detector. Every data and physical formula requires precision. A wrong number is a thousand miles away. This time, the explosive yield and the physical properties of the aircraft materials are also key parts of the investigation report.
Zhuo Huan just handed it over to Fu Cheng so casually. Although everyone was a little surprised, they didn't think there was anything wrong.
But Old Joseph still asked: "Reid, don't you write it yourself?"
Zhuo Huan looked up at Fu Cheng, the corners of his lips curled up: "Do you want me to write it?"
Fu Cheng stared at him fixedly, shook his head, without much expression on his face. "Need not."
Su Fei: "Anyway, we have to sort out the data and materials."
GCAA investigator Maiha also said with a smile: "Well, we will also help write together."
Everyone laughed together.
Seeing their relaxed and cheerful appearance, Uncle Zhuo was not happy. A dissatisfied hum came out of his nasal cavity, Zhuo Huan sneered disdainfully, walked to his seat and sat down. He crossed his arms and stared intently at Fucheng who was talking to Su Fei. However, such a naked and strong gaze didn't seem to reach Fucheng at all.
Fucheng didn't look at him at all.
Zhuohuan: "..."
Ah.
Twenty-three years have passed since the Emirates 411 crash, and there have been similar cases of the confirmed cause of the crash, so everyone is not in a hurry.
The GCAA does not have the tradition of the NTSB. Every time an accident investigation ends, there will be a summary reception.
But this does not hinder the GCAA's deep pockets.
Maiha smiled and said to the UAAG crowd: "Tonight at the hotel's seafood restaurant, we have prepared some delicacies for celebration. Let's go together then."
The author has something to say:
Zhuo Anxi: Heh, Fucheng, don't you come to ask me for help.
Fu Chengcheng: I really don't understand what Teacher Zhuo is thinking every day!