Only then did Wang Ganya remember that they now have no engine bleed air and no APU bleed air, so they had no choice but to start with the wind.

At their current altitude, the speed must be increased to at least 300 knots, and to reach this altitude it is necessary to maintain a large rate of decline

Whether it's to relieve pressure or restart the engine, they inevitably have to go down.

"Okay, listen to you!" Wang Jianya spit out this sentence with difficulty, and let go of the hand holding Xu Qing: "I hope you are right!" ”

Xu Qing did not hesitate, pressed the height layer to change, and the speed was adjusted to 310, but he did not pull the speed brake. Wang Jianya is right about one thing, pressure relief is not the most urgent, restarting the engine is. The descent is for acceleration, and preparing in advance for pressure relief is only incidental. Therefore, he does not pull the speed brake, and completes the engine restart procedure in the fastest time and within the most descending height is what he is pursuing.

In case the start is not successful, they have more leeway. In addition to increasing the descent rate, the airbrake does not have any of the required attributes!

At the beginning of the descent, Xu Qing glanced at the cabin altitude, which was already close to 9,000 feet, and according to Xu Qing's estimates, the cabin altitude warning would sound in more than two minutes.

However, the cabin altitude must reach the feet, and the passenger oxygen mask will automatically fall, Xu Qing and they have enough time to drop below the foot, and even if the cabin altitude warning sounds, the passenger oxygen mask will not fall, so that there will be less panic among passengers.

Now Xu Qing's height is less than a foot, and he is still 10,000 feet away from the foot!

One thing to note here is that if Xu Qing and they find that there is a high chance that they can successfully start the engine, and at the same time, the rate of rise in the cabin altitude is accelerating, and it will break through the feet in a short period of time, they must pull up the speed brake and descend as soon as possible, and go down to the feet before the oxygen mask falls.

This is because if the oxygen mask falls off, even if the engine starts normally and is re-pressurized, it will not be able to climb again.

The reason for this is that the passenger's oxygen comes from a disposable chemical oxygen generator, which cannot be stopped or reused once activated. Therefore, it cannot be raised again, and what if the pressure is released again, there will be no oxygen available for passengers.

When descending, Xu Qing contacted the cabin, clarified the current situation, and informed the passengers in advance that the oxygen mask might fall off, so that they could be mentally prepared.

After communicating with the cabin, Xu Qing made another passenger announcement, reminding that there was about to be a rapid descent, and hoped that passengers would fasten their seat belts.

Xu Qing deliberately did not mention the word of emergency descent, he was confident that he would control the altitude of the cockpit so that the oxygen mask would not fall off. However, even if it is not an emergency descent, without pulling the speed brake, the descent rate will be large, and it may be dangerous if the seat belt is not fastened, so he specially broadcast a reminder.

At the stage of the aircraft's growth rate, Wang Jianya just completed the rest of the "Engine Failure or Shutdown" checklist, and before transferring to the "Engine Air Start" checklist, the cabin altitude warning sounded as scheduled.

Xu Qing: They still have to wear oxygen masks according to the procedure, and the pilots don't care about the height of the foot.

According to the procedure, the PM first turns the booster selector to the manual position, and pulls the drain valve to the closed position until the indicator valve is completely closed. Now that there is no pressurization, this maneuver still does not control the cockpit altitude of the aircraft.

After that, the pressure is released sharply, and the emergency descent procedure is followed, according to the procedure, the PM will open the passenger oxygen valve, which can ignore the height of the foot, as long as it is opened, the passenger oxygen mask will fall off.

However, they had done it in advance, and they couldn't help but put it down, so that the oxygen mask would fall automatically.

Verify that the seatgate is open, and turn on all lights so that other aircraft can visually avoid it, even if there are no conflicting aircraft nearby.

Xu Qing also turned on the terrain detection on his side to prevent terrain warnings from being exposed to tall obstacles below. At the same time, the engine starting valve also needs to be opened to the continuous position, but now that the double engine is turned off, it will be left alone for the time being, and it will start in the air for a while, and Xu Qingzi will operate the electric door.

The two of them wore oxygen masks, and it was inconvenient for them to move, and even their vision was affected.

This oxygen mask made it very difficult for the king to read the checklist, and it took a second or two to read two words.

Xu Qing was anxious in his heart, watching the rate of rise in the cabin altitude gradually accelerate, and at the current speed, it would definitely reach feet higher than he expected.

Xu Qing patted Wang Qianya, who was still distinguishing the checklist, and when he turned his head, he said: "I'll do it from memory, hurry up!" ”

Normally, except for the memory item, the quick checklist is not allowed to be done from memory, but under special circumstances, the pilot can surpass the checklist, and Xu Qing is confident that there is absolutely no mistake in his memory of the checklist of "Engine Air Start".

Xu Qingxian is extremely boring, and the act of memorizing the checklist has a place to use today!

Wang Wanya glanced at the vague checklist through the oxygen mask, and could only nod helplessly.

"Thrust handle, second shot, confirmed, lighted!"

"The second start the handle, confirmed, cut off!"

Xu Qing a little, while doing it, the thrust handle and the starting handle have been retracted and cut off before, and there is no need to move again. Verify the height, the speed is within the envelope of the wind rotation start, and meet the requirements of the wind rotation start.

"The second starts the electric door, the flight position!"

After turning the starting gate to the flight position, Xu Qing and the others looked at the N2 display of the lower DU. When the N2 exceeds 11%, Xu Qing lifts the second engine handle to the slow train clamp position.

Xu Qing started the timing at the same time, and when starting in the air, as long as the EGT can rise normally within 30 seconds, it is possible to start normally.

Now Xu Qing's height is just over a foot, and the height is relatively high, and the EGT waited for more than ten seconds before it began to rise. At the moment when the EGT rose, Xu Qing and Wang Qianya involuntarily clenched their fists.

Five seconds is as long as five centuries, and as the EGT rises, so does the N1 and N2. After about ten seconds, the red line indicated by the EGT disappeared, the EGT fell back slightly, the second engine stabilized, and the engine restarted successfully!

Xu Qing hurriedly turned on the right side of the engine generator door, and then the right component valve was automatically in position, the engine starting valve was turned into a continuous position, and the APU still maintained power supply to the left side.

At the same time, Xu Qing also changed the pressurization mode selector to the automatic position and resumed the automatic pressurization mode.

At this time, Xu Qing could see that the cabin altitude began to drop, and the highest cabin altitude at this time was about feet, and the passenger's oxygen mask did not fall.

Xu Qing and the others waited until the cabin altitude dropped below their feet before taking off their oxygen masks one after another. The moment he breathed in the outside air, Xu Qing felt so sweet, the terrifying and desperate ten minutes just now was simply unbearable.

"Blue 9441, supercharging and engine problems have been dealt with, apply to continue the climb to altitude 7500!" Xu Qing looked at the limit altitude of a single engine, and the oxygen mask did not fall off, so he applied to return to 7500 meters.

"Blue 9441, you can climb to altitude 7500, so you guys are now the second engine? Or is it diverted to W City according to the original plan? The regulator asked.

"That's right, we're still diverting to W City." Since the second start is good, there is no need to risk going to that airport.

"Okay, then you still keep course!"

"Keep course received."

"Why is the vibration value of this engine so high?" Wang Jianya pointed to the vibration value, and Xu Qing saw that it was now 3.2, and it fluctuated up and down slightly.

Xu Qing was also extremely worried in his heart, according to the current situation, there must be parts of the engine damaged, but I don't know if this damaged state will lead to the second shutdown of the engine.

Xu Qing didn't dare to adjust the speed too much, because the throttle was too large and could easily cause vibration to intensify, and Xu Qing had been trying to maintain a throttle as much as possible.

The good news is that now they are less than twenty minutes away from W City, and all Xu Qing can do now is Amitabha, hoping that the engine can last a little longer.

During this period, the company contacted Xu Qing to routinely inquire about the current status of the aircraft and the physical condition of the captain. When he learned that there was a second fire just now, the leader on duty at the company broke out in a cold sweat.

Xu Qing briefly repeated their operation just now, which caused the leaders on duty to marvel again and again. In the dangerous situation of double flameout, Xu Qing, the first-level co-pilot, can still keep a clear head, which can only be described as a miracle.

After that, Xu Qing prepared for the approach in accordance with the regulations, and now it is still a single shot, so it is landed with a flap 15. Xu Qing asked for the Tong Bo of W City, fortunately the gas of W City is very good, quiet wind, visibility 9999, CAVOK, and the runway marked on the Tong Bo is 22L. According to the current course, Xu Qing and the others could directly guide to the five sides, and they didn't have to make a turn of more than ninety degrees.

According to Xu Qing's request, Wang Jianya made a checklist for "Single Launch". Since there was a fire alarm this time, although the fire warning has now disappeared, it is reasonable that the fire has been extinguished. However, just in case, there may be some dark fire, what to do if it burns again, for the sake of insurance, directly occupy the runway after landing for a while, evacuate in situ, and put an end to all hidden dangers.

After entering the approach area of W City, the frequency switched to the approach frequency and began to guide Xu Qing all the way down.

Xu Qing didn't think there was any problem at first, although the vibration value of the second engine has always been high, and even increased to 3.8 in about ten minutes, but fortunately, there are no more problems so far, as long as you hold on for another five or six minutes, you can complete the task gloriously.

The approach directly allowed Xu Qing and them to turn left and fly a 240 course, cutting straight to the five sides.

Wang Jianya saw that the landing was imminent, and the qi conditions were very face-saving, and the pressure in his heart was released a little, thinking about this thrilling time in the past, he felt shuddering.

Suddenly, he noticed that Xu Qing's face was a little wrong, and he couldn't help but ask, "What's wrong?" ”

Xu Qing frowned, his face full of worry: "I don't think I should fly like this!" ”