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There is a mechanism for the flap of 737, that is, when the airspeed approaches the limit speed of 30, the flap will automatically unload to twenty-five, and the automatic change of this flap will not be reflected on the flap finger table.

of.

However, as the flaps were closed, the speed of the aircraft began to rush up uncontrollably, and it seemed that it was already exceeding the limit speed of the flaps of thirty.

"What's going on? Why did the airspeed get so fast?" Wang Xuan also noticed the abnormal change in airspeed, but he didn't react for a moment that the flap was unloading.

I also thought that it was due to the continuous decrease in altitude and the increase in air density, and the aircraft's descent ability continued to decrease.

However, the airspeed was too obvious. Even if Wang Xuan reacted slowly, he could still detect an abnormality.

"The flap is unloaded." Lu Jinghua pedaled on the center console with one foot: "The speed can't be reduced, let's go!"

As soon as these words were said, Wang Xuan and Teacher Zhang woke up from a dream. However, Teacher Zhang was obviously a little unwilling to accept it: "What if I wait?"

"What are you waiting for? What's the point of waiting?" Lu Jinghua showed the courage of the top leader of the flight department at this time: "I don't talk about flap speeding anymore. Now the speed is getting bigger and bigger, and the required standard degradation rate will also be

Then increase. Your speed cannot decrease and the decline rate cannot increase. If you take what you want, pull it up quickly and leave!"

"This" Teacher Zhang looked at Wang Xuan awkwardly, obviously hoping that Wang Xuan could speak out to help him.

However, Wang Xuan was silent for a while, and finally sighed: "Listen to Mr. Lu, let's go!"

Teacher Zhang showed a hint of disappointment on his face, but he still did not dare to disobey the wishes of the chief engineer and general manager. He pushed the accelerator up and lifted his posture to the reflying posture.

Since the thrust of the engine takes a certain time to increase, the flap usually needs to be received after the thrust is added to the thrust. However, given that the aircraft itself is relatively high, even if the posture increases, it is not enough.

, the airspeed increase during reflight will also be quite obvious, so after Instructor Zhang pushed the throttle to the predetermined position, Wang Xuan took the flap to fifteen on his own, which was slightly earlier than the normal flap collection time.

a little.

"The flap is rising and closing!" After sitting everything, Wang Xuan made a standard call and reported to the tower: "Yulong Tower, 9,000 blue sky, has returned to flying!"

"Blue Sky 9000, received. According to the standard re-flight procedure, the sea pressure is corrected by 3,099, and the sea pressure is corrected by 1011."

"The standard re-flight re-flight procedure is to correct the sea pressure of 3,900 and correct the sea pressure of 1011." Wang Xuan replied. Correcting the sea pressure of 3,900 means the standard re-flight altitude, but there is no change.

As the aircraft continued to grow, Wang Xuan received the flap to 5 according to the growth rate plan, and then adjusted the speed to 18, which means that the growth rate will no longer be increased.

Wang Xuan said lightly: "Just keep the flap five."

"Hmm?" Lu Jinghua, who had not spoken much since the re-flying, was quite surprised: "Are you going to have another round?"

If you want to get a second approach, many aircraft will maintain flap five after going back to fly, saving the trouble of both growth and slowing down. However, in Lu Jinghua's vision, it is not necessary to directly receive a smooth state at this time.

Go back to Jianchuan?

Wang Xuan looked back at Lu Jinghua in confusion: "Mr. Lu, let's just hover and contact our home for a while."

Seeing that Wang Xuan was not giving up, Lu Jinghua curled his lips and patted Teacher Zhang on the shoulder: "What do you think?"

"Mr. Lu, I also feel like waiting for a while and making a decision at home." Instructor Zhang smiled dryly while connecting to the autonomous driving.

"Okay!" Lu Jinghua spread his hands: "You guys are really not giving up. You can just apply to join Cangkou's standard waiting right. You can call your home to satellite."

Lu Jinghua is a very casual person anyway, so he still has time to make a satellite phone call. However, he doesn't think there will be any chance of communication with his family.

What should be considered was almost done yesterday, and it was the performance problem of the plane that they should use. They used all the speed reduction methods to build the configuration strictly according to the plan requirements, and they still couldn't do it.

, that is basically impossible to fall in no matter how hard it is.

What's the use of contacting your home? Is it impossible for the Blue Sky Air to be able to call the wind and rain? Of course, if there is really a god who can increase the temperature around the Yulong Airport to more than 30 degrees, there may be some chances.

Just as Lu Jinghua finished speaking, Yulong Airport asked first: "Blue Sky 9000, why did you fly back to the air just now?"

"The approach speed is too high." Wang Xuan replied immediately: "Blue Sky 9000, can I join the Cangkou standard and wait right along the standard re-flight procedure?"

"You can join the Cangkou standard and wait right, and the height is maintained at 3,900 meters." The tower said: "What are your follow-up plans? Are you going to approach again?"

"After joining the waiting period, we have to contact our family. If we have a decision, we will notify you immediately."

After resolving the affairs on the tower, Wang Xuan didn't even wait for the plane to fly to Cangkou to wait for the starting point, and said to Teacher Zhang: "You monitor the first part."

In fact, in this case, the communication should be handed over to Lu Jinghua behind him. However, even Wang Xuan did not dare to do his best to be his boss, so he could only give it to Teacher Zhang.

Teacher Zhang knew the truth. Anyway, there was no communication task at this time, so he nodded: "Connect communication."

Wang Xuan hummed and found the Blue Sky AOC number in the CDU satellite phone option. This number is pre-stored in the database and can be used as soon as it is called out, which is very convenient.

However, the satellite phone was still very bloated at this time, and there was a landline-shaped device at the bottom right of the central console. This is the communication device of the satellite phone, which takes up a lot of space.

In the later period, Boeing improved the satellite telephone system, integrated it into the communication system, and added SAT satellite telephone transmitters, just like the VHF one, VHF two, high frequency one, and high frequency two.

The pilot can connect directly to the satellite phone just by switching the transmitter. I don’t know how much more useful than the old-fashioned satellite phone.

About three or four seconds after the speakers had a sound like normal dialing, the satellite phone was connected, and the sound of a man in the cockpit could not help but sounded. It was the signing!

When Wang Xuan saw that the phone was connected, he immediately took off his headphones, picked up the old landline microphone and said to the sign-in side: "Can you hear it clearly now?"

"You can hear it clearly, Mr. Wang." The signing party said something, then there was a gurgling sound, and then someone else answered, but when he heard the sound, Luo Yong who had been guarding: "Wang Xuan

, How is the situation?"

To put it more seriously, the operation of transporting emergency personnel and materials is related to the life and death of Lantian Aviation, or to be more precise, to be related to Luo Yong's personal future.

After the plane took off, Luo Yong stood by the signing seat and did not dare to leave for a moment.

However, although Wang Xuan had not mentioned what happened, Luo Yong was already feeling it. Because if nothing really happened, the plane should have landed at this time. It should be called on his cell phone, so where can he use it?

Satellite phone.

"Mr. Luo, the plane has been in good condition before the final approach to the positioning point. However, after passing the FAF point, the plane was a little unable to get off and could not maintain a descent rate of 1,500 feet at all." Wang Xuan said:

"Now we have already pulled up, just want to ask you what you think, should you go back or do it again?"

After Wang Xuan finished speaking, he noticed someone from behind patting his shoulder. He turned to see that it was Lu Jinghua pointing at the microphone and signaling him to say. Wang Xuan handed the microphone to Lu Jinghua, and Lu Jinghua immediately said: "Mr. Luo,

Everything was flying according to the plan, with no problems in procedures and operations. If we still fly according to the plan, then I don’t feel that it is necessary to do it again.”

It’s not that Lu Jinghua is lazy, but that this thing is not the reason for the operation or the procedure, or because the weather is too cold, the lift coefficient of the plane is relatively large, so it cannot be pulled down. If the descent rate is forced to be maintained, the speed will rise.

.To maintain accurate speed, the descent rate must be reduced, and the aircraft cannot intercept the glide passage.

So, this is a dead end! Even if you try it a hundred times, it will basically have the same result.

Luo Yong is also a smart person and understands Lu Jinghua's meaning. It seems that their plan does not take into account the factors of the change in lift coefficient in low-altitude environments.

However, they are not pneumaticians, so how could this thing be considered so accurately? Even if they consider it, they do not have the ability to calculate it.

"You mean a different plan?" Luo Yong asked inquiring.

"If you don't change the plan, it means repeating meaninglessly, and there is no need to try it." Lu Jinghua said in a deep voice: "The plan before the final approach to the positioning point can be changed. The drop rate of 2,000 feet does not trigger the terrain warning.

The problem is that after passing the final approach positioning point, as the height decreases, the descent rate of 1,500 feet becomes increasingly difficult to maintain. If you want to maintain the speed in an acceptable state, you must reduce the descent rate."

Luo Yong's heart skipped: "What should I do if the sliding track is going down?"

"Since we have broken the standard of stable approach, we can do it thoroughly. Anyway, we have done special matters and there was no concept of stable approach before, so why don't we still fly?"

Luo Yong has already developed some tricks: "What do you want to do?"

"The descent rate of 1,500 feet is too large, so it will be reduced to 1,300 feet. As needed, at a lower altitude, the descent rate can be reduced, as long as the AFE height is less than 200 feet.

A drop rate of more than one thousand and one hundred feet will not even sound the SINK RATE warning.”

"You mean no reference to the downhill path at all, or pushing the height of the intercepted downhill path backwards significantly? Isn't this just a visual approach?" Luo Yong was able to figure out Lu Jinghua's thoughts soon: "But,

There is no visual approach procedure for running track 21 of Yulong Airport?"

In the rules of Part 121, visual approach is not about flying as soon as you want, but about the airport having relevant procedures and is determined based on the meteorological conditions of the corresponding procedures.

However, Yulong Airport itself does not operate visual approaches, but only conducts instrument approaches. Strictly speaking, Lu Jinghua is a serious violation.

However, Lu Jinghua did not hide his illegal ideas: "In this approach, the downhill was originally a burden for us. In order to catch up with the downhill, we had to insist on a large decline rate, but this could not be done at all.

In this way, it would be better to completely ignore the slide. What is the difference between intercepting a slide at a lower height or intercepting a slide at a lower height? Even at a drop rate of 1,100 feet

When I enter the venue, I believe Teacher Zhang can also take care of it."

As the altitude of the aircraft decreases, terrain warnings will have increasingly strict standards for the aircraft's descent rate. When approaching the runway, the descent rate of the aircraft cannot be continuously greater than 1,100 feet, otherwise it will be easy to occur.

SINK RATE alarm sound.

This alarm can only be regarded as a warning, and in principle does not affect the unit's continued landing. However, after this alarm sounds, it will be easily converted into warnings such as Terrain PULL UP. Then the unit can no longer land, and if it lands again, there will be a warning.

Controllable risk of hitting the ground.

Therefore, at an extremely low altitude of 1,100 feet is considered a relatively limiting value. Otherwise, under artificial action, it is difficult to control the measurement between terrain alert and warning.

However, with such a large drop rate, if the skill in hand is slightly worse, the plane hit the ground, and it would be possible to break the landing gear directly.

However, Lu Jinghua was right. The downhill thing has been restricting the approach this time, making the crew unable to let go.

There are many things that the crew cannot decide, and there are so many restrictions out of thin air. How can this plane land?

It’s not that Lu Jinghua is bold, but the concept of stable approach was not popular a long time ago. Everyone flew more casually. As long as the plane could be safely dropped, who cares about what you do?

Lu Jinghua does not deny the significance of stable approach to safety, but only talks about special circumstances and special treatment.

After Lu Jinghua's words, it fell into the ears of Teacher Zhang in front of him. Teacher Zhang immediately responded to the military order: "I can definitely take it if I enter the field with a drop rate of 1,100 feet. What did flying fighter jets look like before?

All the steps are flying, and the drop rate of 1,100 feet is not large."
To be continued...