Duan Xu is a controller at the Beijing Airspace Center, and he is 33 years old this year, and he has been engaged in this industry for ten years!

Since the day he graduated from the aviation school and was assigned to the capital airport, he has been staying in this position, from the apprentice to the two apprentices in his hands, he has been meticulously doing this job. Pen, fun, pavilion www. biquge。 info

Perhaps in the eyes of outsiders, he is a tall airport worker, but only he can understand the actual sadness, a salary of more than 3,000 a month, completely unable to bear the burden of living in the capital.

As a controller (air traffic police) at the Beijing Aviation Regional Control Center, he must shoulder his responsibilities.

After the shift change at 8 o'clock in the morning, he quickly brought up his headphones, switched the communication system in front of him to a fixed channel, and glanced at the position and height of each light point on the big screen in front of him.

He had to keep an eye on the planes flying at high altitudes at all times to avoid them from drifting their paths and differences in speed and altitude.

Because once there is an error, it is very likely to lead to an irreparable aviation disaster,

Maybe it's the collision of two oncoming planes, or maybe it's the delay of all the planes on the screen, all in all, his job is boring and repetitive, but it's so important!

"Huh, how did 7720 deviate from its course?"

When he swept the approximate position of a certain aircraft on the screen, his abrupt face changed, and then he quickly swept the route declaration map and specific information of the aircraft in his hand.

"A320-200 model, belonging to China Southern Airlines, took off from Runway 1 at 8:10 and flew to Xingcheng, Hunan Province, 20 minutes later, he should be in the sky above HS City, Henan Province, which is 210 kilometers away from the best planned route, but why did he run to the airspace area above DZ City in Lu Province?"

Thinking of this, and then glancing at the exact position movement map on the radar screen, Duan Xu couldn't help it, and he hurriedly used the VHF VHF radio wave communication in his hand to send an early warning to China Southern Airlines flight CZ3720, which was flying at a high altitude and deviated from the course.

"CZ7720, this is the Beijing District Survey! The radar has identified that you have deviated from the planned route, please quickly turn back to the planned route, please answer! ”

But as time passed minute by minute, no matter whether Duan Xu used VHF radio or transferred to the secondary radar airborne equipment to contact, he still couldn't get on this flight.

Just when Duan Xu was anxiously considering whether to report the anomaly, on the radar, the radar reflection signal of the flight was instantly interrupted and disappeared.

If it weren't for the fact that ACARS (Aircraft Communications Addressing and Reporting System) was still in operation, he would have thought the flight would have disappeared.

"Master, what's wrong?"

A district control officer who was in the internship period next to him looked at the anxious look on his face and asked curiously.

"You immediately help me to continue calling flight CZ7720, I'll make a call. Saying that, Duan Xu did not hesitate at all, and directly transferred to the air traffic control center,

"What? Are you sure that the 7720 took the initiative to turn off the airborne secondary radar?"

Because any civil aircraft will not turn off the secondary radar when it actively deviates from the planned route, because it is like a car that is driving at high speed and does not obey any traffic rules and takes the initiative to disassemble its brakes!

Something is wrong!

This extremely abnormal situation suddenly made the control personnel of the duty center very nervous!

While he quickly reported the situation, he instructed the regional dispatch control to continue calling the CZ7720 flight that had lost contact.

Everyone was praying that it was just an accident, not a hijacking, or even a worse plane crash!

But when the time came to 8:33, the airport, the air traffic control center, and the regional dispatch center still lost contact with the 7720 flight.

Whether it was the communication system, or on the radar, they lost all information about that plane.

A deputy director of the air traffic control center on duty arrived in a hurry, and in the face of such an unexpected situation, he could only give the most direct instructions.

"Contact Flight 7720 at all costs, and in the case of unreachable, notify the Modu Regional Dispatch Center to coordinate all aircraft on the planned route in the airspace to pay attention to avoidance. In addition, immediately give me the Aviation Safety Office of the General Administration and the Civil Aviation Administration of North China!"

Subsequently, he directly issued an order to temporarily evade all aircraft near the route in the high-altitude and medium-low altitude control areas of the capital, so he could not hesitate for half a minute!

Because the plane flying at high altitude, once it crashes, it means an irreparable catastrophe!

"Lao Liu, what's going on?!" Zhang Liwei, general manager of the Capital International Airport Group, and Han Wangeng, a person in charge of the Beijing operation base of China Southern Airlines, hurried over.

Subsequently, the emergency working group and airport emergency working group of the Civil Aviation Administration of China in the Capital International Airport arrived accordingly.

Liu Boda, deputy director of the air traffic control center who was in charge of the command in the early stage, hurriedly said, "The matter is obvious, through the information feedback of the aircraft ACARS system, we can clearly conclude that the flight is still flying, but I don't know what happened, causing the flight to deviate from the route and actively turn off the secondary radar, and now I have proposed information sharing to the North China Regional Administration of Civil Aviation, and am ready to turn on a radar for real-time tracking." ”

(i.e., en-route monitoring radar, which is installed at a predetermined flight waypoint and is generally used for military purposes.) ）

"Good, but I need more information and details now, who can tell me if there were any anomalies in the flight before and after takeoff?! Zhang Liwei was angry, but there was no better way.

A middle-level person in charge of the matter immediately handed over the information at hand, "Mr. Zhang, this is the specific boarding information of the flight, including 117 passengers and 6 crew members, including five overseas passengers, three Americans, one British, and one Pakistani." ”

"In other words, we don't have anything but this!" With this information, Zhang Liwei really couldn't think of what he should do next.

But just when he hesitated, the emergency phone of the air traffic control center rang quickly, and it was Cui Wei, director of the Civil Aviation Administration.

Obviously, things have already worked out!

And at the same time, from the missing flight CZ7720, the short four numbers "7500!" were issued through the on-board transponder.

It was these four numbers that made everyone present frightened, because in aviation terms, it represents a sudden emergency that everyone does not want to face - hijacking!

"Analyze all passenger and crew information immediately, I want to know every detail, quickly!" No one can ignore the serious consequences of the hijacking, especially Han Wangeng, a senior executive of China Southern Airlines who was present,

He is less than 50 years old this year, and he still remembers the hijacking plane crash that happened 16 years ago in 1990 at Yangcheng Baiyun Airport!