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Chapter 57 What happened? Why did Flight 5574 send three emergency codes in a row?
cockpit.

Liang Dong still looked at Jiang Yifan with a confused expression.

What time has this happened? Hanging up emergency codes is of no use! ?
The key is.

Why do we have to hang three emergency codes in a row? !

And the order can't be wrong? !

What on earth does this mean! ?
As an experienced pilot, Liang Dong naturally knows that ground air traffic control distinguishes each aircraft in the air through transponder codes.

And if the aircraft changes to an emergency code, ground air traffic control will also know through the emergency code what kind of danger the aircraft is currently encountering.

When airplanes are flying in the sky, most of the time they encounter danger, they are alone and helpless.
When an aircraft encounters an emergency, normal communication may not be possible, so you need to use emergency codes to call for help quickly.

飞机紧急代码主要有六种，分别是1200、1255和1277、2000、7500、7600、7700。

The meaning of 1200 is 'visual flight without designated transponder', in other words, 'transponder failure'.

1255 and 1277 are relatively special codes. They mean "private plane" and have no other meanings.

2000 means that the administrator did not give a code, which means that the aircraft does not have its own 'identity document' during the flight. This emergency code is not very commonly used.

7500 represents an emergency situation encountered by an aircraft, which means illegal interference. The main situation refers to an emergency situation in which an aircraft encounters a hijacking or is in danger of hijacking, so that the ground can respond quickly to the situation.

7600 indicates a communication failure, communication failure or radio disconnection situation, because there will be many unexpected situations in the sky, which may sometimes interfere with communications. Therefore, if the aircraft cannot contact the ground, it can send this code to inform the ground so that air traffic control can take action. react.

7700 is the most commonly used code in aircraft. It indicates an emergency situation on the aircraft. This emergency situation not only includes mechanical failure of the aircraft, but may also indicate sudden illness of the personnel on board. After issuing this code, the air traffic control will Distinguish this flight from other flights to facilitate notification of relevant civil aviation units for emergency support.

Jiang Yifan ordered Liang Dong to send three emergency codes in sequence.

But the meanings of the three emergency codes are completely unrelated.

Not to mention that his instruction was very rare, it was probably unprecedented, and perhaps unprecedented.

It is completely inconsistent with the standard procedures for aircraft rescue.

However, Jiang Yifan seemed to have no intention of explaining. Instead, he continued to look forward and controlled the aircraft to avoid a cumulonimbus cloud in time.

Liang Dong had no choice but to act according to the instructions.

The captain is the highest commander on the plane, and everyone must obey the captain's orders.

Chengdu Regional Control Hall.

"Director, we received another emergency code from 5574." Ye Fan suddenly said loudly.

Zhao Zhengyang hurried over.

But before he could ask, the other party suddenly said softly, "Huh?!"

"What's wrong?!"

Zhao Zhengyang asked quickly.

"5574 actually hung up two emergency codes in a row. No, it was three. 5574 hung up three emergency codes in a row." Ye Fan looked confused.

After other staff members heard this, they also cast surprised looks at him.

Ye Fan thought there was a bug in the system and quickly typed on the keyboard.

Zhao Zhengyang quickly stopped him and asked, "What emergency code was 5574? Was it 7700 again?"

He thought that the 5574 crew felt that the ground did not realize the seriousness of the matter, so they sent three '7700' codes in succession to tell the ground that they were in great danger.

Although this situation is rare, it does not happen.

When some flights encounter danger and are unable to effectively contact the ground, they will choose to send several identical emergency codes in a row to indicate that their current situation is urgent.But Ye Fan's next words made him a little annoyed, "Yes, but no."

"Speak carefully, what is wrong?!" Zhao Zhengyang asked with a frown.

Ye Fan was a little anxious and quickly explained, "5574 pinged three completely different emergency codes in a row, first 3, then 7600, and finally 7700."

"What?!" Zhao Zhengyang was instantly confused.

3 emergency codes were hung in a row? !

Moreover, the meanings of the three emergency codes are completely unrelated.

What happened to Unit 5574? !
Is it because the brain is deprived of oxygen? !

Zhao Zhengyang couldn't figure out the reason even if he thought about it.

"Immediately report the latest situation to the General Administration, Qilu Airlines (Shandong Airlines) and the military. Don't be idle. Think about what it means to suddenly send three emergency codes 5574." He ordered decisively.

Just because you can't figure it out doesn't mean that others can't figure it out either.

And the probability that all the crew members of Flight 5574 would be amused is not high.

Although it is incredible that Flight 5574 sent three emergency codes in a row, the other party cannot be contacted on the ground, and the other party cannot contact the ground, so it can only rely on emergency codes to transmit information.

Therefore, the other party sending three emergency codes in a row must have a deeper meaning.

Understanding what the other person wants to express may play a very important role in the subsequent rescue.

Flight 5574 issued three emergency codes in a row? !

Moreover, the contents of the three emergency codes are completely different.

What you want to express is completely different!
The code numbers of aircraft transponders range from 0000 to 7777. There are 4096 in total, but there are only a few commonly used ones.

Now 5574 uses 3 in one breath.

What do you want to do? !

Zhao Zhengyang felt like his head was about to explode.

Even if he tried hard, he couldn't figure out what Flight 5574 wanted to express.

The key is.

Flight 5574 was not aimless. He must have known that his communication system was malfunctioning, so he used this method to convey information to the ground command center.

In other words, deciphering the true meaning of these three emergency codes will be of great help to the subsequent rescue work.

If the true meaning of the three emergency codes cannot be deciphered in a short period of time, it will have catastrophic consequences for the subsequent rescue work.

What is most lacking in rescue now! ?

It's time!
At this time, time really is life.

Decoding it one second earlier might have saved more than 100 lives. Decoding it one second late might have resulted in the largest air crash in the history of Xia Guo Airlines.

Thinking of this, Zhao Zhengyang forced himself to calm down.

He murmured, "7600 means that the plane has a communication failure and cannot contact the ground. This is the same situation that 5574 is currently experiencing. 7700 means that the plane has an emergency. This is also in line with 5574's current predicament. But there was clearly a hijacking on flight 7500, which is completely different from what happened to flight 5574. Is it really the hijacking of flight 5574 that led to a series of subsequent incidents?!"

"It's impossible. It's impossible."

However, for the sake of safety, Zhao Zhengyang still reported his speculation and asked Jiangbei Airport to immediately verify the identity information of all passengers on flight 5574 to see if the plane was really hijacked.

(End of this chapter)