Chapter 170 Supercharge! Explosion! (Please subscribe!)

"9951, please keep the altitude of 3,000." Before Xu Cang and the others could report their situation to the control, the extremely unstable altitude display on the radar was enough to make the controllers' hearts tremble.

At this moment, the altitude of the 9951N flight was lower than the starting height and the sea pressure was corrected by 3,000 meters. In fact, before this, the radar had detected an emergency code on the 9951N flight, which means that the crew encountered some difficult faults. Usually, even if the aircraft deviates from the altitude, the controller will not specifically remind you. Because experienced controllers know that the crew may be busy dealing with special conditions at this time and have no time to take into account the altitude maintenance, let alone the call with the controller.

At this time, the controller takes the initiative to contact the unit, which may not easily disrupt the rhythm of the unit. Therefore, as long as it is not particularly dangerous, the controller usually takes the initiative to contact the unit.

In standard operating procedures, the state of the aircraft is the most important under any circumstances. The flight crew is not waste. Once they maintain stable control of the aircraft, they will definitely contact the controller.

However, the position of the plane is now quite awkward. Since the departure direction of the Erhai Lake is slightly special, the plane needs to turn left continuously and fly over the field after takeoff, and then set sail.

Furthermore, because of the extremely awkward location selection of Jianchuan Airport, there are mountainous areas close to the airport area that can cause terrain threats, and it happens to be concentrated on the departure trajectory of 9951N. If it is other departure procedures, the controller will see that the plane has a fault and it will be fine if it drops a little. But now the height of 9951N is dropped at the position of 9951N. If the crew is busy dealing with the fault, it may ignore the terrain threats, so it is necessary to remind you.

As a result, the moment the controller contacted the crew, there was a response soon, which was Tan Heling's voice: "9951, the flight control failure is malfunctioning, and it is difficult to maintain altitude now. Apply for flight direction 170."

This application was not instructed by Mo Shangyun, but by Tan Heling himself. Although Tan Heling is not good at psychological quality, he was the captain before, so he reacted after a little slowdown.

The terrain threats near the airport are all concentrated in the north area, so take the initiative to stay away from this area. Within a radius of 25 kilometers of the airport, the minimum security height of the north area is 7,200 feet, while the remaining areas are only 3,100 feet, and the margin at the vertical height is much greater.

Now they have problems with pitch and manipulation, and they reflect that they actually have an unpredictable deviation in control of height. In this way, no matter what, fly yourself to a relatively plain area first to make more control space for yourself.

Not to mention anything else, when I heard the crew reply, the control side put down half of my heart, glanced at the radar screen slightly, and confirmed that the 170's course had no impact, so I agreed to Tan Heling's application: "9951, you can fly to 170. If you can, report the fault."

However, this sentence was like a rock sinking into the sea, and there was no reply at all.

In front of the control seat, the controller looked at Director Liu beside him with a little confused: "Director, what should I do?"

Director Liu was also very upset, but it was different from the 747S2 switch incident at that time. Now his appointment has come down, and as long as there is no particularly serious problem with the command this time, he will not have any major impact.

However, no matter what, as a regulatory commander, there is a record of an air crash on his resume during his term of office that is not a good thing.

"Don't worry, try not to call in the future." As he said, Director Liu asked: "How many planes will be entered in the next half hour?"

The controller immediately moved to another computer, sang on the keyboard for a while, and quickly retrieved the relevant information: "In half an hour, five planes are expected to enter the approaching area."

"Notify the regional control room to release the controlled status of this field, requiring that new aircraft not be allowed to enter the approaching area within half an hour of this field, and the regional control room will be deployed by itself."

"What if there is a special situation?" asked the controller: "What about the reserved landing?"

Director Liu immediately said: "Notify all airlines that this field will not accept normal reserve landings except for emergencies."

The so-called normal reserve landing is the kind of reserve landing with spare space. For example, when flying to Qianxi Airport, Qianxi Airport is covered by thunderstorms, there are more airports that meet the reserve landing standards. Jianchuan Airport is OK, and Sichuan Airport is OK.

In this case, as long as there is a choice, Jianchuan Airport will not accept it as the first backup site.

But if it is an emergency, you can only land on Jianchuan. For example, when the fuel is in urgent need, there is a risk of emergency fuel volume when going to another airport, then Jianchuan Airport can only accept it, because in that case, the crew will most likely declare a state of emergency. Everyone is in an emergency and can't just focus on one side.

However, the possibility of two emergencies being encountered is still very low.

The controller nodded, and now he planned to contact the regional control room to issue an order for route allocation. However, just now he was planning to move. From the corner of his eyes, he suddenly saw that the height of the 9951N flight on the radar screen stopped the downward trend. After maintaining for a short period of time, it gradually rose.

The controller's eyes lit up and he became excited: "The altitude has begun to recover, and the plane has been controlled?"

"Hmm? Is that right?" Director Liu was inspired and approached the radar screen and looked at the height data. Sure enough, it began to rise slowly. He was also excited: "Okay, okay, it doesn't seem to be a big problem."

Previously, due to the incident of the 747S2 switch, not to mention anything else, at least in terms of psychological quality training, Director Liu basically belongs to the level of "seeing the world". He has even seen "real" blind submissions, so why aren't other minor problems easy to get?

"Notify the ground and apron to wait for the ground plane." Director Liu thought that as long as the plane was controlled, it was likely to return to the ground. Now the airspace of the field is relatively empty, and it will not take long to land after a round.

When I thought that Xu Cang was still on the plane, although I felt that this kid was really lucky, his skills were still trustworthy. As long as it was not a particularly serious problem, there should be no problem.

Director Liu began to make room for the return plane, but as soon as the order came down, before he could be conveyed, he heard the controller exclaim lightly, and he was immediately attracted to his eyes: "What's wrong?"

Although Director Liu was feeling a little relieved, a string in his mind was still tense. He could react when he heard the abnormal noise from his supervisor.

"The plane has exceeded 3,000 again." The controller pointed to the radar screen: "Is there something wrong with the plane?"

"What?" Director Liu, who had just been happy that he had not lasted for half a minute, looked at the radar screen again. As expected, as the controller said, the flight altitude of 9951N flight has exceeded three thousand meters and nine thousand eight hundred feet.

Director Liu was stunned for a moment, and he watched helplessly as the height continued to increase, as if the rate was still increasing.

"No, what do they want to do?" The abnormal descent of the plane just now would cause a terrain threat. Now that the plane has exceeded the predetermined altitude, there are no more terrain problems. However, if you climb up without restrictions, you will have to break through the upper limit of the approach control area.

You should know that Jianchuan’s field is originally a waypoint. When rising, a very serious problem will arise, that is, it will reach the bottom height of the route.

The controller saw that the climbing speed of flight 9951N was getting faster and faster, and sweat was oozing from his forehead.

"director!"

Director Liu slapped his forehead and pointed at his assistant: "Urgently notify the Jianchuan Regional Control Room to close the W134, X12, and W334 routes through Jianchuan JAC. At the same time, he informed that an uncontrolled aircraft was rising rapidly in this field, and now it has exceeded the standard air pressure of 1,200 meters."

JAC is the three-character code of the VOR station of Jianchuan, and it is also a waypoint. There are three quite busy routes to meet at this waypoint. Therefore, once the 9951N flight rises to the bottom height of the route, the impact will be unprecedented over time.

Now Director Liu’s only hope is that Xu Cang quickly controls the plane and then lifts the order to close the route as soon as possible.

"Xu Cang, what happened!"

At this moment, in the cockpit, Mo Shangyun and Tan Heling were both pushing the driving wheel forward, but the driving wheel was as if it had grown.

Because Mo Shangyun had previously shown a relatively obvious pole-bearing action in order to bring the altitude of the aircraft back to the original height, he then blocked the pitch of the pilot wheel in a state of tilting the nose.

Even in such a huge pitching state, coupled with the majestic engine thrust, the aircraft was sprinting upwards without control. Xu Cang looked at the lifting meter behind. At this time, the rise rate of the aircraft remained at 2,000 feet per minute, and there was a trend of continued increase.

Almost in the blink of an eye, the altitude of the plane had exceeded 1,200 meters, and even Xu Cang didn't know where the apex of the upward height was.

Tan Heling was pushing the rod hard while dialing the main electric trim door on the pilot plate forward, in order to use pitch trim to control the head-up blocking of the aircraft.

However, Tan Heling moved forward several times, and the trim wheel was completely unresponsive. Tan Heling felt the anger surge because he kept pushing the pole. Now he couldn't even use the main electric pitch and trim. He was furious and cursed: "What kind of shit aircraft, can't use the electric balance?"

Tan Heling's voice immediately alarmed Xu Cang and Mo Shangyun. Because Xu Cang and Mo Shangyun had been a little afraid of the 1566 aircraft before, the stress reaction between the two was a little serious, and their thinking was a little confused. They even forgot to use pitch and balance to control the aircraft.

"Teacher, can you use manual matching?" Tan Heling really couldn't push it, and his mind was thinking about how to use pitch matching.

Even if the main electric trim fails, it can still be trimmed manually. There is a trimming wheel on each of the left and right seats, and there is a spring-connected handle inside the wheel. After picking it out, you can manually control the trimming wheel.

The priority of manual matching is very high. Even if the electric matching cannot be used, manual matching is likely to be used. However, the efficiency of manual matching is extremely low. The matching stroke generated by the main electric matching in one second may be converted to manual matching for more than ten rounds, and it is still a physical work, which will be exhausting.

Moreover, in extreme cases, as the aircraft speed increases, the aerodynamic load on the horizontal stabilizer surface will also increase (see 737MAX), and it is very likely that manpower cannot rotate the trimming wheel.

Just as Tan Heling split his left hand and pulled out the handle of the flat wheel, Xu Cang said from behind: "Don't turn, you can't turn."

"Then you have to try it too. Electric matching is useless and cannot be turned manually." Tan Heling said.

Xu Cang was speechless: "The driving wheel was stuck at the rear pull rod, how to hit the main electric trim forward? You can try it now."

Tan Heling was also the captain. He was anxious just now and didn't remember it. After being reminded by Xu Cang, he reacted. In the 737 trim system, electric trim cannot have a reverse effect with the control of the driving wheel.

For example, if the driving wheel is brought back, the main electric trimming system will suppress the input signal of trimming forward, because the manipulation effect produced by the two is opposite.

However, this will not affect manual matching, that is, no matter whether the driving wheel is forward or backward, if it is manual matching, just hit it like this. This is the priority of manual matching.

However, at this moment, the aircraft's driving wheel was blocked in the rear belt position. It was naturally not possible for Tan Heling to use electric trim to move forward, so he needed to switch the trim door to the overcontrol position, so the main electric trim system would not suppress the trim input signal of the opposite stroke.

Before using the main electric matching, Tan Heling turned his head and looked at the corner of the center console. He found that the cover of the matching power door had been opened, and the power door was toggled to the overcontrol position. Obviously, this was what Xu Cang just made.

"This." Tan Heling's old face turned red. It was embarrassing that he, a captain, forgot that such a simple thing was really embarrassing. Fortunately, Tan Heling was thick-skinned. When nothing happened, he turned around and said nothing, and silently began to play the matchmaking team forward.

Sure enough, after the switch is placed in the overcontrol position, the main electric balance begins to take effect.

Tan Heling was not polite, and almost turned forward according to the main electric trim door, and the trim wheel quickly turned forward without stopping for a moment.

The balance is mainly used by pilots to eliminate rod force, so the stroke it generates is not as exaggerated as manual manipulation. However, if you hit it to the end, the effect will be relatively obvious.

At first, the rise rate of the aircraft still exceeded 2,000 feet per minute, but under the trim effect, it gradually decreased to about 1,000 feet per minute, which was a relatively stable rise rate.

"Would you like to use manual trimming to hit the front?" After hitting the electric trimming forward, Tan Heling still refused to give up and wanted to use manual trimming to hit the front. The travel range of manual trimming is larger than that of electric trimming.

As a result, Xu Cang waved his hand and said, "Stop hitting, the speed is too high now, you can't hit it, so keep your strength."

After listening to Xu Cang's words, Tan Heling asked Teacher Mo Shangyun several times, "Teacher, there are too many breakthroughs in height, do you need to reduce the accelerator?"

"No!" As a result, Mo Shangyun had not answered yet, and Xu Cang, who was sitting behind, directly rejected the proposal: "The pitching posture is too big, the accelerator cannot be reduced, and the speed cannot be maintained after the reduction."

After saying that, Xu Cang took a deep breath, and he forced himself to calm down. After waiting for about five seconds, Xu Cang found a wireless microphone from the small grid at hand, inserted it into the hole of the handheld microphone, and then adjusted to a VHF transmitter, and said to the microphone in a calm tone as calm as possible: "9951N, the aircraft pitch is now blocked, and the aircraft altitude cannot be controlled. Please immediately evacuate the aircraft on the air route."

"Xu Cang, how is the plane now? Can it be handled?" Director Liu quickly identified Xu Cang's voice on the other end of the radio, and immediately snatched the microphone and asked.

"It's okay, we can handle it."

After saying that, Xu Cang's originally restless heart gradually calmed down. This was not Xu Cang's showing off, but compared to the situation he encountered before, the pitch barrier alone was still within an acceptable range.

After all, during the pilot's retraining, they still practice operating blocking from time to time, but no one will train to make a landing on the water, and no one will train to make a landing "blind" all.

"Okay!" Director Liu just said one word: "I have contacted the regional control room to adjust the aircraft above your plane."

"Thank you!" After Xu Cang said that, he placed the wireless telephone in a small grid on the side.

He swallowed a saliva and finally relaxed his heart to the normal range. At this time, there should be no panic at all. Calmness is what he needs most.

"Don't use force, now we will do the checklist from scratch." Xu Cang said calmly.

Since one of the cockpits is an instructor, one is a captain, and the other is Xu Cang, they directly ignored the checklist when there is a problem. This is not that they do not know about flight control blockage or restricted checklist, but they instinctively surpass the checklist in behavior, but Xu Cang wants to follow the checklist to do the last time.

"Okay!" Mo Shangyun slowly relaxed the muscles of his arm: "Come on, do it!"

Xu Cang did not go through the inspection form. Whether it was a memory project or a non-memory project, it was all in his mind, and there was basically no pause. Xu Cang said directly: "Automatic driving. Disconnect!"

Although the autonomous driving has been disconnected, Mo Shangyun still pressed the automatic driving disconnect button on the driving wheel again: "The autonomous driving is disconnected!"

"Automatic throttle disconnected!"

Similarly, Mo Shangyun pressed the automatic throttle disconnect button at the top of the thrust handle and confirmed: "The automatic throttle is disconnected."

“Prove the thrust symmetry!”
To be continued...