Return to 2000: Captain of the Great Powers

Chapter 11 Thrust Decay
Jianchuan City has a special geographical location. It is warm in winter and cool in summer. It is a place for many birds to spend the winter.Moreover, the airport is already remote, and the number of birds is even greater.

The captain stretched his waist, and had already seen the bird repelling vehicle driving on the path at the edge of the runway, and the sky exploded firecracker shells from time to time.Looking at the posture, I am afraid that the crew reported a bird strike just now, which made the airport anxious.

If there are too many bird strikes, the airport will be ordered to close in the worst case. If Jianchuan Airport is temporarily closed by the bureau because of this, it is really ridiculous and generous.

Seeing that it would take a while, the captain simply pulled up the parking brake, turned off the taxi lights, and pulled the seat back. The whole person nestled in the seat, looking very comfortable.

As the cockpit became quiet, Xu Cang could feel that the fuselage of the plane seemed to be shaking all the time, which was not caused by the engine running.

"It's windy!" The captain put his hands behind his head, and lazily turned his head to look at the windbag beside the runway: "It's really unlucky to choose this place. The thunderstorm season has just passed, and the wind season is here."

The co-pilot followed the captain's gaze and saw that the windbag was blown straight and parallel to the ground, and it was still rotating, which indicated that the wind direction was very unstable.

"It's not even in the afternoon yet. When we return, wouldn't it be more windy?"

The co-pilot said casually, and an instruction came from the control tower: "Feiyu 6321, you can enter runway 23, and correct the sea pressure to 1020."

The captain who thought he would have to wait a while suddenly pouted, stepped on the parking brake, stepped on the accelerator, and scanned the runway and finals to confirm that there was no risk of runway incursion.

The first officer replied to the control tower, turned on all external lights, turned on the terrain display on his side, pressed the test button of the weather radar, and switched the TCAS to the TA/RA position.

"The five sides of the runway are safe, and the takeoff thrust is 93.5." The co-pilot opened his mouth, as if Xu Cang was not alone in being sleepy at work.

While the aircraft was aligned with the runway centreline, tower control gave takeoff instructions.

"Flying feather 6321, surface wind 15012, gust 15 meters, runway 23 can take off."

"Runway 23 can take off, Feiyu 6321!" The co-pilot raised his eyebrows a few times: "When we were preparing, there was only a steady wind of seven meters on the METAR, how did it change so quickly?"

Although the captain and co-pilot were lazy before, but once they were about to take off, the two of them completely restrained their minds and sat up straight.

When it was about to align, the captain pressed the timing button and began to push the throttle forward at the same time, and said: "The wind is a little unstable, pay attention to the wind shear."

"En!" The co-pilot responded, knocked on the handle of the side window, and finally adjusted the position of the lower seat to make himself more comfortable.Finally, he quickly scanned the take-off configuration, confirmed that it was correct, and noticed that the thrust had stabilized at 40%, so he stopped hesitating and shouted directly: "The direction is good, the take-off thrust is stable!"

"Then let's go!" The captain immediately pressed the TO/GA switch, and the two CFM56-7B24 engines whizzed up. The power of up to 22 DaN pushed the fuselage weighing tens of tons to continuously accelerate.

Xu Cang bent his head, boredly looking at the runway centerline marking that was flying past in front of him, and the standard shouts of the captain and co-pilot were all in his ears.Although the content is roughly the same, there are still some differences in subtleties.Even standard operating procedures vary from company to company.

Suddenly, Xu Cang felt the plane shake, and even the taxiing direction changed.Xu Cang didn't pay close attention to the status of the plane. After all, he was not flying, so there was no need to be so diligent.Subconsciously, he thought it was caused by the airflow.

As the speed of the aircraft increases, the rudder effect of the aircraft becomes stronger and stronger, and the influence of turbulence on the aircraft becomes more and more obvious.

However, I thought it was just a small episode, but unexpectedly, the taxiing direction of the plane became more and more unstable after that.

"Huh?" Suddenly, the co-pilot noticed a slight fluctuation in the thrust of the No. [-] engine.However, he hesitated for a while, because the thrust of the engine is not constant, and it is normal for a very small range of changes.

However, after a moment of hesitation, the thrust of the No. 93.5 engine suddenly dropped from the preset standard thrust of 91 to 1.A [-]% change in N[-] speed is acceptable, but it is obviously problematic to drop so much at once.

The co-pilot stopped waiting and immediately reminded the captain: "Brother, the thrust of the No. [-] engine is abnormal."

Just as the co-pilot was speaking, the thrust of the No. 91 engine dropped from 80 all the way to below [-].This time, there was an obvious thrust difference between the two sides of the thrust, and the already unstable sliding direction instantly deteriorated.

"Not good!" The captain pulled out his energy, quickly glanced at the engine display of the upper DU, and immediately locked on the abnormal N1 of the No. [-] engine.

As the pilot, most of his energy is outside during the take-off phase.Like Xu Cang, he thought the plane was fluctuating just now because of the airflow, but now it seems that it may be caused by the unstable thrust caused by the malfunction of the engine.

At this time, the speed of the aircraft has exceeded [-] knots, and only the failure of the engine can meet the conditions of the rejected takeoff.But now the thrust of the No. [-] engine continues to decay, does it meet the conditions?
In this case, the engine seems to fail, but not completely!Such ambiguities are most annoying.Perhaps because he had never encountered such a situation before, the captain was a little undecided for a while.

The decision to cancel the takeoff can only be made by the captain in charge, and the co-pilot was nervously waiting for the captain's decision. Suddenly, the cockpit fell into an eerie silence.

Although the captain hesitated, he did not give up control of the aircraft state at all. Even when the thrust of the No. [-] engine continued to decline, the taxiing direction of the aircraft was stabilized.

Moreover, the captain's hesitation did not last long, and within a second or so, he made a decision: "Stop!"

A one-second reaction time is not a quick decision, but it is definitely not an excessive performance.

But the moment he called out the interruption, the co-pilot was ready to cooperate with the captain to carry out the procedure of interrupting the take-off.However, there was a loud roar behind them: "Continue, V1!"

One second is only two blinks of an eye, but in one second, the speed of the aircraft increased by six knots, directly exceeding the V1 speed.However, this plane did not have an electronic message from V1, and the co-pilot was so absorbed by the abnormality of the engine that he did not notice that the speed of the plane had already exceeded V1.

Only Xu Cang from behind saw it!So, he spoke!

At this moment, the captain showed a decisiveness different from before. He didn't even verify Xu Cang's words by himself, and stopped his movement with his right hand on the throttle lever.

He did!

(End of this chapter)