A small airport in Y province......

Chen Yi put down the seat, half-lay down and closed his eyes to recuperate, now everything is ready to wait for the passengers to finish, and then leave!

Just when Chen Yi was comfortable, a control voice came from the frequency of the tower: "Blue sky 9856, the tower is called!" ”

"Blue Sky 9856, please speak!" A pair of radio monitors replied to the tower's question as soon as possible.

Tower: "That's right, there are temporary restrictions from K City, and you will tell me when you are fully ready, and I will apply with K City again." ”

"Okay, get ready!" I didn't think there was anything wrong, K City is an aviation hub, and the traffic is huge, and it is relatively normal to have a traffic restriction occasionally, and he estimates that the time should not be very long.

Accustomed to it, Chen Yi was not happy, opened a slit in his eyelids, picked up the earphones that were put aside, and said with a microphone: "What is the reason for the flow control, do you know?" Approximately how long? ”

Chen Yifei in this class has been flying for I don't know how many years, and there is rarely a situation of flow control, so I asked casually if I was curious.

Tower: "It shouldn't be a long time, it seems that there is a problem with the plane in K City, and the airport needs to be deployed at the interval." ”

At this time, Chen Yi's originally half-squinted eyelids were all opened, and he was even more curious: "What's the problem?" Which company? ”

"Wait a minute!" The tower was silent for a few minutes, and when he spoke again, his tone was indescribably strange: "It seems to be your plane!" ”

Chen Yi's lazy body tensed up suddenly, straightened up, and hurriedly asked, "Our company?" Which flight? ”

After all, Chen Yi has been a leader for a long time, and when he encounters this kind of thing, he reflexively begins to pay attention to it.

"Mr. Chen, it seems to be 9433!" The tower hasn't answered yet, but one has answered first.

Tower: "I don't know exactly which flight it is, but it doesn't seem like a state of emergency has been declared, so it shouldn't be a serious matter." There is only a small amount of flow control in K City, so it shouldn't be a big problem. ”

Chen Yi thanked the tower for his comfort, and then hurriedly asked, "How do you know?" ”

One handed the phone to Chen Yi, and the screen showed the page of the WeChat chat group, and the other explained: "This is the co-pilot's chat group." There was a co-pilot who was taxiing at the time, and he had just turned to the tower, and he heard it in the tower frequency, and now he is still waiting outside the runway! ”

Chen Yi listened to a pair of explanations, while flipping through the chat records of the WeChat group, it was mentioned that the blue sky 9433 seems to have encountered problems with the instrument display and engine, and it seems that there are some problems with the control system, and now it has begun to return.

After reading the chat history, Chen Yi returned the mobile phone to a pair with a heavy heart, and asked, "Who is 9433 flying?" ”

"Teacher Chang!" A pair of answers.

Chen Yi is like five thunderbolts, he sometimes turns over the class of the regular teacher, if the rest period coincides, he will occasionally make an appointment to have a meal or something, after this reminder, he remembered that the regular teacher will take Xu Qing today!

"Xu Qing, Xu Qing! Why can't you stop for a moment? Chen Yi sighed.

......

After the Blue Sky 9433 was allowed to turn left on its own three sides, it slowly rose to a height of 4200, and in the process, Chang Instructor found an increasingly obvious problem, the bar force seemed to be getting heavier and heavier.

At first, Instructor Chang thought it was the reason for the lack of trim, until the plane reached an altitude of 4200 meters, and when Instructor Chang wanted to change the leveling height, he finally affirmed that there was indeed a problem with the rod strength.

When it was about to be leveled, he didn't even hold the pole and finally allowed the plane to break through 4,200 meters. However, Chang Instructor was quick to correct his eyes, and he was only nearly 100 feet higher than 4,200 meters, or 13,800 feet.

By the time it was time to level out, the change in rod force was already quite noticeable and became extremely heavy. Now that the trim is within the normal range, it is definitely not the reason for the trim.

"Do you see there's a problem with the rod force?" Instructor Chang motioned for Xu Qing to feel the rod force himself, he was now injured in both hands, and he wondered if he had really injured himself to the point that he couldn't even perceive the rod force correctly. If this is the case, even if he is unwilling, he needs to return the manipulation to Xu Qing. After all, to be too reckless is to be irresponsible to those on board.

Now the plane has been corrected to a level flight state by Instructor Chang, which is quite stable, Xu Qing is not stage frightened, he took over the control, and brought the rod down slightly, just like this, Xu Qing immediately noticed the difference in rod strength.

Wanting to press the brought plane back to its original height, Xu Qing pushed the lever slightly, but he didn't expect the plane's reaction to be very slow, and he waited for a second or two before he had a bowing moment.

Xu Qing was puzzled, how could this delayed feature be a bit like the characteristic of manual recovery?

After knowing that the maneuvering of the plane was delayed, Xu Qing maneuvered more delicately, and spent some hands and feet to adjust the plane back to 4200 meters of level flight again.

Seeing that Xu Qing was a little troublesome, Instructor Chang was almost sure that there must be something wrong with the rod force.

"Wrong with the pole strength?" Instructor Chang said as he took over the manipulation again. Since there is no problem with the perception of his own hands, it is still up to him to continue to manipulate.

Xu Qing snorted: "The rod force is a bit heavy, and it's a bit like ......."

"Artificial recovery, right?" Teacher Chang directly took Xu Qing's words.

That's right! Now the rod force feels exactly like manual recovery.

Teacher Chang gave Xu Qing a look, Xu Qing understood, and opened the system page of DU, which included the display of hydraulic index.

The hydraulic index of the 737 is shown as a percentage index, and now the hydraulic index of the A and B hydraulic systems has less than 30 percent left, and it is still decreasing at a rate visible to the naked eye.

Within a few seconds, the main warning light was on, and Xu Qing looked up to see that the low-voltage lights of the A and B hydraulic systems were all on.

At the same time that Xu Qing reset the main alert, his mind was already a mess of numbness, can the MCAS system still cause hydraulic low pressure? Xu Qing now habitually attributes all problems that arise to the maneuvering characteristic enhancement system.

But come to think of it, it shouldn't make sense.

"Oil leaks?" Instructor Chang guessed whether the body would be damaged by just scratching the mountain, so that the hydraulic pipe was damaged and the hydraulic oil leaked out.

If there is only a leak of hydraulic oil, Instructor Chang doesn't care very much, it's just manual recovery, if it weren't for the inconvenience of his hands, he can fly the plane as normal.

If the hydraulic oil leakage caused by the scratch just now is really because of the scratch, it means that the scratch just now is very serious, and he is worried about whether there will be damage to the body in other aspects.

The position of the scratch just now is in the wing, and the leading edge device and trailing edge flaps may be damaged, so special attention needs to be paid when approaching and placing the flaps later.

The most serious case was damage to the wing structure, but he couldn't even think of it!