Return to 2000: Captain of the Great Powers

Chapter 170 Supercharge!explode! (Please subscribe!)
"9951, please maintain an altitude of [-]." Before Xu Cang and the others reported their situation to the controller, the extremely unstable altitude display on the radar was enough to make the controllers tremble.

At this moment, the altitude of flight 9951N is already 3000 meters below the initial altitude correction sea pressure.In fact, prior to this, the radar had already detected that the aircraft of flight 9951N had issued an emergency code, which indicated that the crew had encountered some difficult faults.Usually, at this time, even if the plane deviates from the altitude, the controller will not give special reminders.Because experienced controllers know that the crew may be busy dealing with special situations at this time, and have no time to take into account the altitude maintenance, let alone talk to the controller.

At this time, the controller took the initiative to contact the crew, saying that it would not be easy to disrupt the rhythm of the crew.Therefore, as long as it is not a particularly dangerous situation, the controller generally waits for the crew to contact.

In standard operating procedure, the state of the aircraft is the most important in any situation.The flight crew are not trash, once they maintain stable control of the aircraft, they will definitely contact the controller.

However, the position of the plane is more awkward now.Since the departure direction for the flight to Erhai Lake is somewhat special, the plane needs to turn left continuously to fly over the field after takeoff, and then depart.

Furthermore, because of the extremely embarrassing location selection of Jianchuan Airport, there are mountainous areas that can obviously pose a terrain threat near the airport, and they happen to be concentrated on the departure trajectory of 9951N.If it is other departure procedures, the controller sees that the plane has malfunctioned, and it is fine to drop a little altitude, but now the altitude is dropped at 9951N. If the crew is busy dealing with the malfunction, they may ignore the threat of the terrain, so we must remind.

As a result, the moment the controller contacted the crew, there was a quick response. It was Tan Heling's voice: "9951, the flight control is faulty, and it is difficult to maintain the altitude now. Please apply for flight heading 170."

This application was not instructed by Mo Shangyun, but by Tan Heling himself.Although Tan Heling's psychological quality is not good, at any rate, he used to be the captain, so he reacted after a little delay.

The terrain threats near the airport are all concentrated in the northern area, so take the initiative to stay away from this area.Within a 25-kilometer radius of the airport, the minimum safe altitude in the northern area is [-] feet, while the rest of the area is only [-] feet, and the vertical height margin is much greater.

Now they have problems with pitch control, and the actual performance shows that there are unpredictable deviations in the control of altitude.In this way, no matter what, first fly yourself to a relatively plain area to give yourself more control space.

Among other things, when the crew responded, the control side relaxed half-heartedly, scanned the radar screen a little, and confirmed that there was no effect on heading 170, and agreed to Tan Heling's application: "9951, yes Fly heading 170. Report the malfunction if you can."

However, this sentence fell like a stone 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 in a little confusion: "Director, what should we do?"

Director Liu is also very annoyed, but at this moment it is different from the 747S2 switch incident.Now that his appointment has been made, as long as there are no particularly serious problems in this command, he will not have any major influence.

However, in any case, as a control and command officer, having an air crash record on his resume during his tenure is not a pretty thing.

"Don't worry about it, try not to call in the future." Director Liu asked, "How many planes will enter the airport in the next half hour?"

The controller immediately switched to another computer, tapped on the keyboard for a while, and quickly called up relevant information: "Five aircraft are expected to enter the approach area within half an hour."

"Notify the area control room, announce the controlled status of the field, and request that no new aircraft enter the approach area within half an hour of the field, and the area control room will deploy it on its own."

"What if there are special circumstances?" The controller asked, "For example, what about an alternate landing?"

Director Liu immediately said: "Notify all airlines that normal alternate landings will not be accepted on this field, except for emergencies."

The so-called normal diversion is the kind of diversion with spare space.For example, if you fly to Qianxi Airport, but Qianxi Airport is covered by thunderstorms, then there are more airports that meet the standards for alternate landings, such as Jianchuan Airport and Sichuan Shuan Airport.

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

But if it is that kind of emergency, you can only make an alternate landing in Jianchuan, such as fuel shortage, and there is a risk of emergency fuel supply at other airports, then Jianchuan Airport can only accept it, because in that case there is a high probability that the crew will A state of emergency will also be declared.Everyone is in an emergency, and we can't just focus on one side.

However, the possibility of these two emergencies meeting together is still very low.

The controller nodded, and immediately planned to contact the area control room to issue an order for route allocation, but just as he was about to make a move, he suddenly caught sight of the altitude of flight 9951N on the radar screen, and stopped the downward trend. After a short period of time, it gradually rose.

The controller's eyes brightened and he became excited: "The altitude has begun to recover, and the plane is under control?"

"Huh? Is that so?" Director Liu was encouraged. He moved closer to the radar screen to look at the altitude data. Sure enough, he began to rise slowly, and immediately became excited: "Okay, okay, it doesn't look like a big problem."

Due to the experience of the 747S2 switch incident before, if nothing else, at least in terms of psychological quality training, Director Liu basically belongs to the level of "seeing the world".Even the "true" blind drop has been seen, and other small faults and small problems are not easy to catch?

"Notify the ground and the apron to temporarily wait for the ground plane." Director Liu thought that as long as the plane is under control, there is a high probability that it will return to the ground and land.Now the airspace of this field is still relatively empty, and it won't take long to land in a circle.

Thinking that Xu Cang was still on the plane, although he felt in his heart that this kid was really unlucky, his skills were still trustworthy. As long as it wasn't a particularly serious problem, there shouldn't be any problems.

Director Liu began to make room for the return plane, but the order had just come down, and before it was conveyed, he heard the controller let out a light snort, and he was immediately drawn to it: "What's wrong?"

In this situation, although Director Liu said that he was in a calm mood, a string in his mind was still tense, and he reacted when he heard some unusual noises from the controllers under him.

"The plane broke through [-] again." The controller pointed to the radar screen: "Has something happened to the plane again?"

"What?" Director Liu, who hadn't been happy for half a minute, looked at the radar screen again. Sure enough, as the controller said, the flight altitude of flight 9951N has exceeded 3000 meters, [-] feet.

Director Liu was stunned for a moment, and he watched the height continue to increase, and it seemed that the speed was still increasing.

"No, what do they want to do?" Just now, the plane's abnormal descent would pose a threat from the terrain. Now that the plane has broken through the predetermined altitude, there is no need to worry about the terrain. Near the upper limit of the control area.

You must know that Jianchuan is originally a waypoint in this field, and if it is going up, it will cause a very serious problem, that is, it will touch the bottom altitude of the route.

The controller saw that flight 9951N was climbing faster and faster, and sweat was dripping from his forehead.

"director!"

Director Liu slapped his forehead and pointed to his assistant: "Urgently inform the Jianchuan Regional Control Office to close the W134, X12, and W334 air routes passing through Jianchuan JAC, and at the same time report that there is an uncontrolled plane on the field that is rising rapidly. Now It has exceeded the standard air pressure of 1000 for two hundred meters."

JAC is the three-character code of the VOR station in Jianchuan, and it is also a waypoint. There are three very busy airways to meet at this waypoint.Therefore, once Flight 9951N ascends to the bottom altitude of the route, the impact will be unprecedented over time.

Now Director Liu's only hope is that Xu Cang quickly control the plane, and then cancel the airway closure order as soon as possible.

"Xu Cang, what happened!"

At this moment in the cockpit, Mo Shangyun and Tan Heling were pushing the steering wheel forward with all their might, but the steering wheel remained motionless as if rooted.

In order to bring the plane back to the original altitude, Mo Shangyun made a relatively obvious movement with the stick, and then fixed the pitch of the steering wheel in a state of nose up.

Even in such a huge pitch state, coupled with the majestic engine thrust, the plane was sprinting upwards uncontrollably.Xu Cang looked at the escalator from the back. At this time, the rate of ascent of the plane was maintained at [-] feet per minute, and there was a tendency to continue to increase.

Almost in the blink of an eye, the altitude of the plane has already broken through 1000 or [-] meters, and even Xu Cang didn't know where the peak of this upward rush was.

While Tan Heling was pushing the stick hard, he was pushing the main electric trim switch on the steering wheel forward, in order to use the pitch trim to control the nose-up jam of the aircraft.

However, Tan Heling moved forward several times, but the trim wheel did not respond at all.Tan Heling felt angry because of the constant ejection, but now he couldn't even use the main electric pitch trim, so he became furious and cursed: "What kind of shit plane, the electric trim can't be used?"

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

"Teacher, should you use manual trim?" Tan Heling couldn't move anymore, and his mind was thinking about how to use pitch trim.

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

The priority of manual trim is very high. Even if electric trim cannot be used, manual trim can still be used with a high probability.However, the efficiency of manual trim is extremely low. The trim stroke generated by the main electric trim for one second may need to be converted to manual trim for more than a dozen laps, which is still a physical effort, and it must be exhausting.

Moreover, in extreme cases, as the speed of the aircraft increases, the aerodynamic load on the horizontal stabilizer will also increase (refer to 737MAX), and it is very likely that manpower cannot turn the trim wheel.

Just as Tan Heling separated his left hand to pull out the handle of the trim wheel, Xu Cang said from behind: "Don't turn it, it won't move."

"Then you have to try it, the electric trim is useless, you can't turn it manually." Tan Heling said.

Xu Cang was speechless: "The steering wheel is stuck in the position of the rear lever, how to turn the main electric trim forward? Try it now."

Tan Heling is also the captain, and he didn't remember it just now because of his urgency, but he reacted after being reminded by Xu Cang.In the trim system of the 737, the electric trim cannot have a reverse effect on the control of the steering wheel.

For example, if the steering wheel is brought back, the main electric trim system will suppress the input signal of trimming forward, because the control effects produced by the two are opposite.

However, this will not affect the manual trim, that is, no matter whether the steering wheel is forward or backward, if it is manual trim, you can play it as you want. This is the priority of manual trim.

However, at this moment, the steering wheel of the aircraft is stuck in the position of the rear belt. It is impossible for Tan Heling to use the electric trim to drive forward, so it is necessary to switch the trim switch to the override position, so that the main electric trim system can Trim input signals for opposite strokes are no longer suppressed.

Before Tan Heling used the main electric trim, he turned his head and looked at the corner of the center console, and found that the cover of the trim switch had been opened, and at the same time the switch had been toggled to the override position, which was obviously done by Xu Cang just now.

"This." Tan Heling blushed, it was a bit shameful for a captain to forget such a simple thing.However, fortunately, Tan Heling was thick-skinned enough, but he just pretended nothing happened, turned around without saying a word, and silently started to move forward to balance.

Sure enough, after the switch was placed in the override position, the main electric trim began to take effect.

Tan Heling was also rude, almost pressing the main electric trim switch to move forward, and the trim wheel turned forward rapidly without stopping for a moment.

Trim is primarily used by the pilot to eliminate stick forces, so the travel it produces is not as exaggerated as manual control.However, if you hit it to the end, the effect is quite obvious.

At first, the rate of ascent of the aircraft was still more than [-] feet per minute, but under the effect of trimming, it gradually decreased to about [-] feet per minute, which was considered a relatively stable rate of ascent.

"Should I use the manual trim to push forward?" After pushing the electric trim to the end, Tan Heling still didn't give up, and wanted to use the manual trim to push forward.The travel range of manual trim is larger than that of electric trim.

As a result, Xu Cang waved his hand: "Stop hitting, the speed is too high now, you can't move, you'd better save your strength."

Tan Heling listened to Xu Cang's words, and after several attempts to putt to no avail, he asked Mo Shangyun, "Teacher, there are too many altitude breakthroughs. Do you want to reduce the throttle?"

"No!" As a result, Mo Shangyun hadn't answered yet, and Xu Cang, who was sitting in the back, directly vetoed the proposal: "The pitch attitude is too big, the accelerator cannot be reduced, and the speed cannot be maintained after reducing the speed."

After finishing speaking, Xu Cang took a deep breath and forced himself to calm down.After waiting for about five seconds, Xu Cang groped for a wireless phone microphone from the small grid at hand, inserted it into the hole of the hand-held microphone, then adjusted to the VHF transmitter, and spoke as calmly as possible into the microphone Said: "9951N, now the plane is stuck in pitch, and the plane's altitude cannot be controlled. Please evacuate the aircraft in the air above immediately."

"Xu Cang, how is the plane doing now? Can you handle it?" On the other end of the radio, Director Liu quickly recognized Xu Cang's voice, and immediately grabbed the microphone to ask.

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

After finishing speaking, Xu Cang's originally agitated heart gradually calmed down. This was not because Xu Cang was trying to be brave, but compared to the previous situation, the pitch jam alone was still within an acceptable range.

After all, during the pilot's retraining, they still practice jamming from time to time, but no one will train for ditching, and no one will train for "blind" landing.

"Okay!" Director Liu just said one word: "I have already contacted the area control room to divert the aircraft over your plane."

"Thank you!" After Xu Cang finished speaking, he put the radio receiver in a small compartment on the side.

He swallowed a mouthful of saliva, and finally eased his heart to a normal range. At this time, there should be no panic at all. Calmness is what is most needed.

"Don't force yourself, now let's go through the checklist again." Xu Cang said calmly.

Since one is the instructor, the other is the captain, and the other is Xu Cang in the cockpit, they simply ignored the checklist when something went wrong.It's not that they are ignorant of the checklist of jammed or restricted flight controls, it's just that they instinctively surpassed the checklist in behavior, but Xu Cang wants to follow the checklist and do it the last time.

"Okay!" Mo Shangyun slowly relaxed the muscles in his arms: "Come on, let's do it!"

Xu Cang didn't go through the checklist. Whether it was memory items or non-memory items, all of them were in his mind. Without any pause, Xu Cang said directly: "Autopilot. Disconnect!"

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

"Auto throttle disconnected!"

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

"Confirm thrust symmetry!"

Mo Shangyun glanced at the N1 speeds of the two engines, and adjusted them slightly so that the two engines were at the same height.

"Okay, next step!"

Xu Cang glanced at the aircraft's altimeter, and said softly: "Control the jammed or restricted system with force. Use the maximum force, including two pilots at the same time when necessary. The two pilots use the maximum control force, A system failure that doesn’t make the cables or fail.”

This sentence is the original sentence in the flight control stuck or restricted checklist, and its meaning is to remove the linkage between the left and right control wheels.

The two steering wheels of the Boeing aircraft are connected together through a certain linkage, that is, if the control amount is input to one of the steering wheels, it will also be reflected on the other steering wheel.

This is not the same as the Airbus sidestick input which can be inconsistent.Airbus’s side stick input is superimposed on the left and right inputs, that is, without the authority to close a certain side stick, if the left seat pushes the stick forward, and the right seat pushes the stick back for the same stroke, then the reaction will be in the aircraft. The control system is to cancel each other out, without any additional control input.

This is fundamentally different from Boeing's control system.

Boeing's maneuvering linkage, which can provide some benefits, also creates a problem at that point.If only one of the steering wheels is stuck, the existence of the linkage device will cause all the two steering wheels to get stuck, so the linkage between the two must be removed.

In the cockpit, there is no button or switch to disengage the steering wheel linkage, so the disengagement method suggested by Boeing is. Violent disengagement!

That's right, it is to rely on brute force to disengage the linkage of the two steering wheels, so as to be independent of each other.

This is different from the fact that both of them pushed the steering wheel forward just now. The purpose now is to disengage the linkage device, so there will be some changes in the way of force.

Mo Shangyun withdrew his right hand on the throttle lever, grasped the steering wheel, and at the same time released the steering wheel with his left hand, stretching and closing his five fingers several times, as if he was relaxing his muscles.

"It really is old!" Mo Shangyun sighed.Just now, Mo Shangyun pushed forward with more force, perhaps because of too much force, which caused his left hand to feel a little sore.

If this happened to Mo Shangyun ten years ago, it would be inconceivable, but no hero can stand the erosion of time.Teacher Mo Shangyun is almost at retirement age, and his physical fitness really can't keep up.

After relaxing his wrist slightly for about five or six seconds, Mo Shangyun glanced at Tan Heling: "I'll take it back, you push it forward, is it okay?"

The best way to disengage the linkage is to use the opposite force.In Boeing's design, no matter how much force the crew uses, violently disengaging the linkage of the steering wheel will not cause harm to the flight control system, so neither Mo Shangyun nor Tan Heling can use the maximum force without worrying about damaging the aircraft.

"No problem." Tan Heling replied immediately.

Although Xu Cang listened to Tan Heling's agreement readily, his breathing was slightly unsteady in his words.It can be seen that the putter was exhausted just now, as if it was a little bit out of strength.

Sure enough, the pilot sat for a long time. Although there was no serious physical illness, it had nothing to do with physical strength.

"Xu Cang, let's try to disengage the linkage of the steering wheel. Please pay attention to the status of the aircraft, and remind you if there is any deviation."

Normally, with Mo Shangyun's ability, he would be able to see all directions, but for a while, he would have to use his full strength, maybe his energy would be overwhelmed, so Xu Cang had to watch.

Xu Cang nodded immediately: "I know!"

"Okay, let's start!" Mo Shangyun sent a signal to the cabin before starting the action.This signal is the same as the signal that strong turbulence is about to occur, in order to let the people in the cabin sit well, so as not to disengage the steering wheel for a while, and the excessive force will cause the aircraft state to change too exaggeratedly, which will cause cabin personnel to be injured.

After giving the signal, Mo Shangyun and Tan Heling held the plate with both hands.

"One, two, three, hard!"

Following Mo Shangyun's order, the two of them pushed hard at the same time, one pushed forward and the other pulled back.From Xu Cang's point of view, Tan Heling's face was flushed from too much force, and a very obvious blue vein appeared on Mo Shangyun's temple, obviously he had exerted all his strength.

Although the Boeing aircraft has the reputation of the sky gym, the amount of exercise is really amazing.

"Is this both sides of the fuck stuck, or the linkage is fixed too tightly, I am really..." Tan Heling's face turned from flushing to pale at first, feeling that if this continues, he will have to lose his strength.

At the beginning, Xu Cang was still a little worried about Tan Heling's state, but he heard Tan Heling yelling to greet all the eighteen generations of Boeing's ancestors, and he was a little relieved, seeing that Tan Heling's spirit is still good.

In comparison, the elderly Mo Shangyun seemed to be unable to stand up.A fine bead of sweat floated on Mo Shangyun's forehead, it seemed that he had reached the end of his battle.

"Teacher, come down, I'll take over for you." Xu Cang patted Mo Shangyun on the shoulder, no matter how hard he was, Mo Shangyun would have to do something wrong, this kind of physical work should be left to himself, a young man .

Mo Shangyun tried again for a few seconds, but the steering wheel was still motionless like a rock. Now Mo Shangyun finally gave up, and slowly let go of his hands. Xu Cang clearly saw that Mo Shangyun's hands were shaking. Started shaking.

"It's really old!" Mo Shangyun didn't try to be brave anymore, he unbuckled his seat belt and quickly made room for Xu Cang.

As the altitude of the aircraft is getting higher and higher, the air is getting thinner, and the aerodynamic performance of the aircraft is also getting worse.As a result, the original ascent rate of more than 1000 feet also began to slowly decrease. When Xu Cang and Mo Shangyun changed seats in the air, the ascent rate was only more than 800, which is considered a relatively moderate ascent rate.

However, this is not news that is enough to make Xu Cang feel happy.Because the attitude of the aircraft is stuck, when the ascent rate returns to zero and the thrust reaches full thrust, the speed of the aircraft will be consumed.

Of course, compared to the uncontrollable rate of increase of two or three thousand at the beginning, the current situation is still much better.

During the time of changing seats in the air, Tan Heling was always paying attention to the status of the plane, but there were no more problems.After Xu Cang sat on the left seat, fastened his seat belt, held the plate with both hands, took a deep breath: "Come again!"

After finishing speaking, the two exerted strength at the same time again. Xu Cang used all his strength this time, and he felt that his head was about to explode.After about ten seconds of high-intensity exertion, Xu Cang's left arm was the first to start to ache.

At this time, Xu Cang secretly regretted why he didn't exercise much, and now he really wanted to exercise in the air, but he couldn't hope for it.

At this moment, Xu Cang finally understood why Tan Heling cursed just now.Now Xu Cang is also greeting the designer of the Boeing aircraft from the bottom of his heart.

Just when Xu Cang was thinking about whether to give up and find another way, suddenly, the steering wheel, which was not moving at all, seemed to loosen slightly, and even Xu Cang could hear the slight click of the buckle.

The voice was so crisp that the three people in the cockpit looked at each other at the same time.

"it works!"

Tan Heling almost yelled, it was all exhausting, and if it was useless, he wished he could smash the plane.However, there are already signs of loosening now, and it is obvious that victory is just around the corner.

The dawn of hope had appeared, and Xu Cang, who was about to give up at first, was immediately refreshed and exerted his strength again.With a more obvious cracking sound, the steering wheel on Xu Cang's side was obviously loose. Xu Cang was caught off guard and brought the plane back again.

"Okay!" Xu Cang moved the steering wheel a little bit. In fact, it is good, but not completely good, because the range of movement of the steering wheel is obviously much smaller than normal, and it can only move back and forth within a certain limited range. .However, compared to the previous state of being completely stuck, it is much better.

Xu Cang pushed the restricted steering wheel forward, and finally tried to push it to the front, and at the same time retracted the accelerator to avoid increasing the speed.

Although the amount of forward travel of the steering wheel is actually not large, in view of the fact that a large amount of pitch trim has been turned forward before, under the operation, the rate of ascent of the aircraft has been reduced to almost zero, and it is almost in a state of leveling .

"Okay, that's almost manipulative."

For someone with Xu Cang's skills, this situation is already under control.Even with an ordinary captain, there is a high probability that the plane can be brought down.

As long as the throttle is retracted a little more, the aircraft can begin to switch to a slow descent.

Mo Shangyun, who was sitting in the back, finally relaxed completely. He saw Xu Cang's manipulation of the restricted steering wheel just now, and there was indeed no problem.

"Let's return to the voyage." Mo Shangyun wiped the sweat from his forehead. The operation just now really made him a little bit exhausted, and he felt that his body was about to collapse.All he wanted to do now was land quickly and go back to lie down.

At this moment, Tan Heling, who had already relaxed, clicked his lips, hugged his arms, put his right hand close to the vent, and asked Xu Cang, "Do you feel a little cold?"

Xu Cang was taken aback, he really felt something when he said that.Just now, I was sweating all over after exerting all my strength. After realizing it, I really felt chilly.

"Turn up the temperature, I'll contact the control." Now they have broken through the altitude, although they have decided to return, but they can't fly randomly, and need to ask the control for the return route.

Tan Heling realized that Xu Cang had accepted the communication, and wanted to increase the temperature of the cockpit on his own.But when he moved his gaze upwards, he suddenly noticed the cockpit altimeter and lift rate gauge on the pressurization panel.

At this moment, the altitude of the plane has leveled off. To be reasonable, even in the climb mode, the altitude rate of the cockpit should be below [-]. But now the above instrument shows that the altitude of the cockpit is increasing by about [-] feet. speed is rising.

"Xu Cang, is there something wrong with the height of this cabin?" Tan Heling interrupted Xu Cang who wanted to contact the control, and motioned him to take a look at the pressurization panel.

Not only Xu Cang, but even Mo Shangyun from behind came closer to look at the supercharger panel.

"Is it a slow release?" Mo Shangyun said first.

According to the pressurization work plan of the 737, this rate of ascent is indeed abnormal, and according to the pressurization altimeter, the cockpit altitude corresponding to the aircraft altitude at this moment should be about [-] feet, but the actual cockpit altitude has exceeded [-] feet. Obviously there is a problem.

"Cause of wiping the tail just now?" Although Xu Cang was puzzled, he acted quite decisively: "Whatever, anyway, there is a problem with the supercharging. Apply for a quick descent first, and maybe you can get off before the pressure is released. to below ten thousand feet."

Mo Shangyun nodded: "Yes, apply for a quick descent first."

Rapid descent and emergency descent are still different, and the current situation has not yet reached the level of emergency descent.

However, when Xu Cang pressed all his fingers on the radio transmission button, the index of the cockpit altitude rate indicator suddenly increased. Tan Heling, who had been paying attention, was stunned, and quickly surpassed the checklist, turning the pressurization mode selector to Manual position, and then move the outflow valve to the fully closed position to prevent the cabin altitude from rising again.

Originally this was not bad and an emergency measure, but when Xu Cang noticed Tan Heling's movement, his face changed suddenly, and he shouted loudly: "Don't move!"

But the moment Xu Cang shouted violently, the outflow valve had been completely closed under the action of manual manipulation.In an instant, the value of the differential pressure indicator began to rise rapidly. Before Tan Heling could react, a huge explosion sounded through the entire plane, and the tail of the plane exploded in the air!

(End of this chapter)