Normally, the vibration value of the aircraft should be paid enough attention to reach 3, and reaching 4 is to enter the "high engine vibration value" checklist, and now the vibration value is not 4 but 5, which is already very dangerous.

Aero engines have high vibration values, so if they cannot be dealt with in time, maintaining this high level of vibration may cause bearing breakage, component damage, and thus extremely serious damage to the engine.

This is already Xu Qing's only remaining engine, if the second engine is scrapped, Xu Qing asked himself if he has the ability to land safely in the case of the failure of the double engine.

Or, under the premise of double-engine failure, it really depends on whether it can land safely, after all, there is no precedent in history for double-engine failure, and then relying on gliding to land safely. Of course, these are all bigwig-level operations, and Xu Qing really doesn't have the confidence to compare with these cattle.

The vibration value has reached 5, so what Xu Qing has to do now must be to do the "High Engine Vibration Value" checklist.

Xu Qing is almost certain that both the surge and the high engine vibration value are due to icing.

Ice build-up adheres to the blades, and when the ice reaches a certain weight, it can affect the rotor balance, causing the rotor to collide with the casing, which will cause the engine to produce persistently high vibrations.

Now every time you hold ***, the damage to the engine is one point more, when the damage accumulates to a certain extent, to the substantial damage, it is likely to cause the engine to stall.

Now that the source of the high vibration value is known, de-icing is required. The engine anti-icing has been on, which is not enough, and another de-icing procedure is required, and this procedure is in the "High Engine Vibration Value" checklist

Of course, Xu Qing also hoped that the control could restore himself as soon as possible, so that they could get out of the icy area as soon as possible, which was the way to draw wages from the bottom of the kettle.

Xu Qing immediately announced the "High Engine Vibration Value" checklist!

The checklist starts with two scenarios: in icy conditions or in not icy conditions!

That is, Boeing took into account the situation that icing conditions are prone to high vibration values at the beginning, and then the next step is the de-icing procedure recommended by Boeing.

The engine starts the electric valve and both are in the flight position! This is supposed to prevent the engine from stalling. In the event of icing, the engine's air intake tract is also affected, resulting in a reduction in air intake. The starting valve flight position can be continuously ignited to prevent the engine from accidentally stalling.

Autothrottle, disconnect! The autothrottle has been disconnected since the first fire alarm, which is not a matter of concern.

In the next step, push the handle, retract to 45% N1 for 5 seconds, then slowly push forward to a minimum of 80% N1 and hold for about 1 second. This step of decreasing and then increasing the thrust is the de-icing procedure.

However, before doing this procedure, Xu Qing still needs to clarify the situation with the controller. Because it is already a single shot, and the throttle is received by 45%, the altitude may not be maintained.

"Blue 9441, now the second vibration value is high, I need to reduce the thrust for a period of time to make a checklist, and I may not be able to maintain 8100!"

The control quickly replied: "Blue 9441, there is no impact now, you can deal with the fault independently, now the military is already rescheduling, you can turn right in two minutes!" ”

This news is the most exciting in this time!

With the permission of the control, Xu Qing began to operate the thrust according to the requirements of the inspection list. After retracting the throttle, the altitude of the plane dropped slightly by more than 200 feet, and when the throttle was added, Xu Qing corrected the altitude by the way.

After doing this set, Xu Qing adjusted the throttle to the amount of throttle when he leveled the cruising just now according to the checklist.

Waiting for 15 seconds, Xu Qing and Wang Jianya stared at Xia DU without blinking, praying in their hearts that the vibration value would come down quickly.

Under the watchful eyes of the two people, the engine vibration value slowly decreased, and after about 10 seconds, the engine vibration value had dropped from 5 to 3.8, although it was still high, but it was already at the limit.

According to the checklist, if the vibration value of the engine can drop below 4, you can continue to operate normally, and the checklist is over.

In a desperate situation, fortunately, the last candle was not extinguished, and Xu Qing could still see some hope!

Xu Qing wiped the sweat on his forehead, if you carefully distinguish the ten seconds just now, you will find that there is no sound of breathing in the cockpit Xu Qing and Wang Qianya's hearts are really beating out in those ten seconds.

After waiting for the vibration value to drop below 4, Wang Jianya slapped his thigh and almost jumped up.

"Blue 9441, you can turn right and yaw now, and you can control the course by yourself, and the gas will not affect the report!"

The time of two minutes passed in a flash, and the control dutifully informed Xu Qing that he could turn right as soon as possible.

"Blue 9441, then I'll turn right to 280 first!" Xu Qing glanced at the weather radar and chose the fastest course.

"Courseing 280 agreed, you just had a fault with the second engine, how are you dealing with it now?" The control just heard that Xu Qing's second hair was faulty, but he was also in contact with the military control side at that time, and he didn't ask for a while, but now he just asked.

Xu Qing immediately replied: "Now that it is disposed of, there should be no problem, you see when we can descend and talk to us, we will definitely have to alternate landing!" ”

Now in the case of a single shot, it is definitely impossible to continue to reach the destination. It's just that now he is trapped in the shelling zone and can't descend below, and his idea is to descend as soon as possible and land as soon as possible.

"If you keep the course of 280 and fly another 40 nautical miles, you can get out of the artillery firing area, and then I will guide you to descend, have you decided to alternate the landing field now?" The regulator asked.

"You wait a minute, I'll ask the family!"

Xu Qing saw that it didn't take long for him to get out of breath, so he talked to the cabin in advance. After a moment of air, after the aircraft stabilized, the captain was removed from the cockpit and secured to the seat of the flight attendant in the front cabin.

The flight attendants have also been trained in crew disability and are not surprised to know this process. By the way, through this call, the flight attendant reported the situation in the cabin.

I have to say that Xu Qing and Li Xianyi's styles are still different. Li Xianyi is mainly moved by affection, understood by reason, and his words are still relatively tactful, and when he arrives at Xu Qing, he has seven points of exhortation and three points of intimidation. If you don't sit back in your seat, you will seriously endanger the safety of the flight, in other words, if you run around, you may lose your life.

This kind of extraordinary moment is to let passengers know the seriousness of the matter, so that they can obediently obey the command of the flight attendant, and only in this way will they not cause trouble to the crew!

Since Xu Qing's broadcast, the passengers in the cabin have settled down a lot, and some passengers who are still chattering will be stopped by other passengers, at least now the chaos in the cabin has been calmed down, and now it depends on whether Xu Qing can land safely.

Xu Qing informed the crew of the intention of the alternate landing, which was expected, and the crew mainly wanted to know the location of the alternate landing, about the time.

It's just that the alternate landing field has not yet been determined, and Xu Qing promised to notify the crew as soon as the decision is made.

In addition to this, he had the flight crew broadcast to find doctors and pilots. The situation just now is one after another, and there is no time to notify the cabin, and now it has slowed down a little, and it is still necessary to follow the procedures for crew disability.

I don't know what the situation of the instructor's injuries is now, and if a doctor can revive the instructor with first aid, the current situation will not be so embarrassing.

Even if there is no doctor, there happens to be a high-level pilot, but Xu Qing remembers that there is no additional crew on this flight.

After receiving Xu Qing's order, the flight attendant replied to Xu Qing in five minutes!

After arranging the cabin, Xu Qing used a satellite phone to contact his family. Originally, Xu Qing didn't know how to use a satellite phone, and he had seen Li Xianyi use it once in the Dongfang 9517 incident last time, so he deliberately learned it, and it just came in handy today.

The company's AOC numbers are all pre-stored in the CDU, as long as you put it forward to call Xu Qing to let Wang Jianya listen to the first control frequency, and contact the company himself.

The satellite phone was quickly connected, and after learning that the captain of 9441 was in a coma, he had just dealt with a fire alarm. The company's AOC was almost frightened into a coma, Blue Airlines is not a big company, and if something big happens, the company can't afford it.

Xu Qing went straight to the topic, wanting the company to choose an alternate landing field, and he is now ready to descend the alternate landing.

According to the CFP, the route diversion landing field is G City, but there are many complex terrain near G City, which undoubtedly increases the difficulty of landing, Xu Qing does not care about this alternate landing field in his heart, he prefers W City, that is, the airport where Li Xianyi chose to alternate in the 9517 incident.

The terrain near W City is flat, and it is much more difficult to land than G City. In the case of a single engine, and automatic driving cannot be used to land, Xu Qing must rely on his own manual landing, so the difficulty of landing at the airport is an extremely important item for Xu Qing to consider.

The company still adopted Xu Qing's suggestion after comprehensive consideration, and it only took more than ten minutes to go to W City than to G City. The nearest suitable airport written on the checklist does not mean that the distance must be the shortest, but the closest choice judged after comprehensive consideration of the airport distance, air, and terrain.

After the company and Xu Qing agreed to land in W City, they will contact the airport in W City in advance and prepare all ground support.

As Xu Qing thought, the company also asked if there were any other pilots on the plane. Xu Qing could only answer that the flight crew was still broadcasting to find someone, but he felt that it was unlikely, the plane was in this state just now, and if there was really a pilot, he would have already identified himself and asked about the situation.

After learning that the vibration value was also high before the second shot, the people at the company almost had a heart attack.

Just a few years ago, there was a situation in foreign countries where the vibration value was high under icing conditions, and then the engine turned off, and it was impossible to start again!