Tower, Lotto 7189, I see that there is a plane on the track of 234 that has been dropping altitude, you see if there is a problem! Anyway, he didn't get the take-off order yet, and the captain of Leto simply reported to the tower the strange phenomenon he saw from the TCAS.

"What!" The tower controller was alerted by the captain of the Lotto and began to look for the strange plane on the radar screen.

Now there are a lot of planes entering and leaving the port, and he can't take care of every plane at all times, and after being reminded by Captain Leto, he is also a little panicked.

There are now only two planes departing from Hong Kong, and only one Blue Sky Airways plane at low altitude.

He suddenly remembered that the Blue Sky Airways plane had just mentioned that there was a problem with the instrument display, but the instrument display problem was not a control problem, and it could still make the plane drop altitude?

The altitude and rise and fall trend of the aircraft can be seen on the controlled radar.

The captain of Lotto is right, the Blue Sky Airways plane is in a continuous decline!

"Tower, I saw that brother, he seems to be a little dangerous, there is a mountain in front of him!" At this time, another voice sounded in the frequency of the tower.

The pilot had just turned from the approach frequency and was now exactly on the fifth side.

Leto's plane was not very clear because of the dazzling sunlight when it looked up, but this plane on the five sides did not have this problem. Under the eye level, the blue sky 9433 is a small white spot against the backdrop of the mountain, and it is estimated that the blue sky 9433 is already very close to the mountain, and it is really difficult to conclude whether it can turn over the mountain.

The most dangerous thing is that even if you turn over the mountain in front of you, there is a higher mountain behind you, and the two mountains stretch out at the same time, I am afraid that it will be too late to fly around!

Another pilot's visual vision made the tower control finally understand the seriousness of the matter, no matter why a simple instrument display problem can develop into a dangerous situation of losing height, now if the obstacle is crossed, it is the most important thing.

"Blue Sky 9433, what is your problem now, why are you descending, please resume climbing, there are obstacles ahead!" The tower control shouted in the frequency.

But there was no response to several shouts, and the tower control heart was cold, and he immediately took off his headphones, turned his head and shouted to the person behind him: "Director! ”

......

The radio speakers were still echoing the call of the tower control, but no one in the cockpit at this time could take care of the tower at all, and now the mountain in front of him was the sharp blade against the throat!

At the moment when the terrain warning sounded, the action buried deep in Xu Qing's muscle memory began!

"Smack!"

Xu Qing's left hand slapped on the throttle lever and pushed the throttle lever to the front, just now the automatic driving and automatic throttle have all been disconnected, at this time the trim wheel is still rushing forward to trim.

"1000 feet!" A pair of radio heights are reported at the back as a standard for terrain spacing!

Almost at the same time, Xu Qing and Instructor Chang used all their strength to bring the rod, and the excessive head-down trim just now made the rod force of the plane look extremely heavy, as if it was jammed. That's the case, Xu Qing and Teacher Chang still tried their best, and the green tendons on their foreheads flared up one after another.

The mountain in front of him became more and more obvious, Xu Qing could even see the gravel on the mountain, everything in front of him was gradually obscured by the mountain, they were too late!

The maximum descent rate just now reached more than 3,000 feet, which was originally a low height, but now the pole could not be brought up, and the mountain in front of him was an impassable ghost gate. At this moment, Xu Qing already had a sense of despair that his donkey skills were poor, and he could only mechanically pull the pole.

This fault is too weird, it has never appeared, it does not exist in their cognition, it is this sudden, unheard of fault that makes Teacher Chang and Xu Qing stunned for a while.

The pit Boeing dug this time was too deep, Xu Qing and the others stepped into it, and before they could understand how to fall into the pit, they found that someone was already filling the pit with soil and burying them alive.

Just when the finger of the Grim Reaper was almost clasped on Xu Qing's forehead, and no matter why the reverse operation was useless, Xu Qing's dead horse began to use the main electric trim to play the trim backwards. Unexpectedly, when using the main electric trim, the trim wheel actually began to be trimmed backwards according to Xu Qing's instructions.

To be honest, he always felt that the authority of the steering stick to cut off the electric door was already very high, and even the driving stick to cut off the electric door did not catch Xu Qing and Instructor Chang a little off guard, and they actually forgot to use the most conventional main electric trim for a while.

"Master, electric trim works!" Xu Qing shouted out in surprise, if the trim was kept playing like this, the pilot's manual lever alone would not be able to stop the plane's head-down moment. Now that the main electric trim is available, there is a hint of life.

"Hit, keep hitting back, don't stop!" Teacher Chang yelled.

He really hated this broken plane, what he had just experienced had completely overturned his previous decades of flying experience. Is this still the same 737 model? He's almost gone!

Without the instructions of the instructor, of course Xu Qing would not let go of the electric gate of the main electric trim, but he keenly discovered a big problem: the speed of forward trim just now is faster than the speed of the electric rear!

And it's not as fast as a star!

Xu Qing had a terrifying thought in his heart, the automatic trim speed just before was the trim speed when the flaps were lowered.

There are two situations of automatic trim of the aircraft, that is, the flaps are retracted and the flaps are lowered, and the FCC (flight control computer) will command the stabilizer trim speed according to the current flap situation: when the flaps are retracted, the low-speed trim: 0.09 units per second, and when the flaps are lowered, the high-speed trim: 0.27 units per second.

This means that the automatic trim speed is usually quite slow when the flaps are retracted.

Xu Qing didn't notice the abnormality of the automatic trim just now, but now that he has the comparison of the main and electric trim, and then thinks about the rotation speed of the trim wheel just now, between the electric light and flint, he found the problem.

The trim speed of the main electric trim also has two speed gears depending on the flap state: when the flaps are closed, the low-speed trim moves the stabilizer at 0.2 units per second. When the flaps are confiscated, the high-speed trim moves the stabilizer at 0.4 units per second.

Now the flap is in the state of retracting, then the speed of the trim should be 0.2 units per second, but recall that the forward automatic trim is obviously faster than 0.2 units per second, so it can be judged that the speed of the automatic trim just now is not the low-speed trim when the flap is closed, but the high-speed trim when the flap is down!

That's 0.27 units per second!

At this moment, Xu Qing's mind was even about to explode.

Why, why this plane refreshed his perception of the 737 again and again. Obviously, the flap is now in the state of folding, why is the automatic trim a high-speed trim according to the condition that the flap is down? Coupled with the phenomenon of bypassing the steering stick and cutting the electric door, he suddenly felt that he was so unfamiliar with flying, so strange that he felt helpless!