Qu Xing waited for a while, but he didn't see anything from Instructor Wang, but after the plane was ready, Instructor Wang said, "Let's fly around again." ”

What does it mean to fly one more lap?

Qu Xing looked at Xu Qing in confusion, Xu Qing's eyes widened, don't look at me for everything, I'm not a jack of all trades, he said casually, I knew what he was thinking?

However, even if he wasn't sure, Xu Qing already had some calculations in his heart. Instructor Wang must not be sure that he is not sure, so he will come around again.

Moreover, there is a doorway for this method to circulate.

A lap should be a full five-sided, one up and down. That is, the process is similar to the manual recovery just now, after takeoff, at the latest when turning to the two sides, there is a failure, and then directly return home.

This process should not change, that is, the fault is replaced.

As for what the fault is, it's hard to guess.

A single engine is the most common, but there are several failures that directly cause a single engine, which is still not an indirect reason, such as high oil temperature, low oil volume and so on.

And then there's the handling side, the supercharging side of the failure, too many.

Xu Qing felt that if he flew for himself, he would be able to cope with it except for some specific failures, such as the failure of the twin engines after takeoff. Even after taking off, he tried several times when he was modifying before, and it was not impossible to fix it, there can only be a probability problem, and there is no absolute certainty.

The failure of the double engine is mainly a problem of calculating the height ratio, as well as when to release the wheel and put the flap must be calculated from time to time, once the calculation is wrong, there is no chance to modify.

To be reasonable, Instructor Wang shouldn't be so frustrated that he would fail after taking off.

Then that's no problem!

Xu Qing has a lot of skills, so naturally there is no problem, but Qu Xing is not necessarily.

"Check it and take off, fly well, and keep the data well!" Teacher Wang said.

Xu Qing guessed well, Instructor Wang was giving Qu Xing a chance, but listening to his words, it seemed that he would be stricter.

"Xu Qing, don't mess around, it's him who checks or you check, you just hang him when you get started!" Teacher Wang added, and thought about it again: "It's okay to remind, at most remind, remember!" ”

Everything was ready, and the plane took off again.

In order to prevent Instructor Wang from playing tricks on interrupting take-off, Xu Qing was highly attentive throughout the whole process, and until he approached V1, there was no problem with the plane. Then the next node is a few seconds after you get off the ground!

If it is a single shot, it should be a failure within a few seconds after leaving the ground. Xu Qingfei still has some experience in the simulator for a month.

After the plane left the ground, it was ascending, and the landing gear was retracted, and suddenly the plane began to shake, and there was a sound of "whirring" and "whirring".

You read that right, the simulator is just that, just like the real thing.

Xu Qing's reaction was so fast that he immediately recognized that this was a phenomenon of engine surge.

The biggest problem with the simulator is that the phenomenon of a single fault is too simple, so that the pilot can easily judge. However, in actual flights, the surge of the aircraft is not limited to a certain phenomenon, ranging from high engine vibration values, to EGT overtemperature, to tail spray fire. But this is the same phenomenon on the simulator, so it's easy to tell.

Xu Qing glanced at the EGT indication of the engine, and sure enough, it was rising abnormally, which strengthened the speculation that this was a surge.

Engine surge is caused by a fault in the airflow in the engine duct, resulting in a part of the airflow rotation blocked in the engine duct, resulting in the engine combustion chamber can not be fully combusted, so that the abnormal temperature rises, and may even turn into an engine fire.

It should be noted here that engine surge does not lead to a rapid attenuation of engine thrust, so there is no thrust asymmetry at this time, and there is no deflection of the aircraft.

"I judged it was engine surge!" Xu Qing directly came up with his own thoughts, he wanted to take Qu Xing to do it.

Qu Xing hadn't turned on the autopilot at this time, and his brain was spinning slowly, but fortunately, Xu Qing was with him. It is much easier to judge the fault not by the phenomenon, but by the fault to confirm the phenomenon.

Qu Xing searched for the information about the engine surge in his brain, compared it with the current phenomenon, and agreed with Xu Qing's judgment.

After judging it, that's when it's time to do the program.

Engine surge has a memory item, and now that the aircraft is in a stable state, the memory item will be done first.

"There is a memory project for engine surge, let's do a memory project first, autothrottle, disconnect!" Xu Qing began to recite the memory item of the engine surge.

"Autothrottle, disconnect!" Qu Xing pressed the autothrottle's disconnect button again to confirm that the autothrottle had been disconnected.

"Thrust handle, affected side, verify retraction! It's not about collecting light, pay attention to closing it slowly! When Xu Qing came out with the memory project, he was afraid that Qu Xing would be confused with the memory project of the engine fire, so he specially reminded him.

Engine fire, severe damage or separation of the memory items on the checklist are affected by the thrust handle directly affected by the slow parking space, but the surge memory item is not!

Here there is the question of whether the engine is salvageable.

Once there is an engine fire alarm and serious damage, then the engine will be scrapped, and there is no need to think about restarting or so on, let alone engine separation. Then this engine can no longer be counted on.

However, the engine surge has not yet reached that level, and the engine surge can retain a part of the thrust if it is treated in time. Even if this thrust is more than normal, it is better than nothing.

This requires the pilot to slowly retract the affected thrust handle until the EGT is received and lowered into the normal range, then maintaining this maximum thrust position.

Xu Yu protected the thrust handle of the second engine with one hand, and Qu Xing retracted the throttle.

While Qu Xing closed the throttle, Xu Qing kept an eye on the EGT's display. Due to engine surge, the EGT has been overrun and is framed in red. With the reduction of the throttle, the index of the EGT did not drop at all, and remained in the overrun area, until the throttle was exhausted, and the index of the EGT remained unchanged.

Errao's operation did not alleviate the engine surge in the slightest.

"Oh, why is the reaction so slow, it may be useful to close the throttle early, what can I do now?" Instructor Wang shouted behind him, as soon as he heard it, he was a great onmyoji.

Just as Instructor Wang's voice fell, the fire alarm bell rang immediately, and the abnormal high temperature finally turned into a fire alarm. Xu Qing, who was already preparing to do the checklist of "Engine Overrun, Surge or Stall", suddenly became clever.

He can see that this circle, Instructor Wang is going to toss hard!

There's a new memory project here!