After the specially arranged vigilant patrol was over, the pilots who participated in today's training immediately followed the landing training. The advantages of the J-15's large fuel load are highlighted, and it can continue to train for two or three hours under normal fuel loads, but sometimes it only carries half of the fuel in order to reduce weight because of its long endurance.

At the end of a solid afternoon of training, as usual, it is time to analyze the flying ginseng and summarize the experience, and after that, it is time for dinner. After eating, I watched the news broadcast, during which Niu Yaoyang came over and stood at the door of the audio-visual room of the officers' club and waited. Li Zhan came out and walked with him to the outside corridor to talk.

Niu Yaoyang reported, "Boss, there is a problem with the plane, I'm not sure about the specific reason, you'd better go over and take a look." ”

"Is it the Five Caves?" Li Zhan frowned and asked.

"Yes."

Li Zhan hurriedly went to the maintenance hangar with Niu Yaoyang. Tomorrow the No. 501 fighter will fly for more than 10 hours, so the maintenance department will conduct a comprehensive inspection of it tonight to ensure the safety of tomorrow's flight. Because the two-seater aircraft is still insufficient, the existing two-seater aircraft use intensity is very large, especially the No. 501, this fighter is to fly at night and land at night, the use intensity is almost twice that of other fighters.

The reason why Li Zhan asked the flight controller directly is because the two-seater aircraft, like the earliest batch of J-15, are 100% original imitations, non-domestic avionics, non-domestic flight controllers, and are exactly the same as the J-11A. A large number of experience in use proves that the Su-27Sk and J-11A fighters should pay special attention to the state of the flight control system in the case of high-intensity use.

So far, only the 533 used by Li Zhan and the two latest ones in service in the J-15 fleet of the Flying Shark Force are new batches, using a new domestic avionics system and a new fly-by-wire flight control system.

The rest of the fighters are still the same, so the pressure on aircraft maintenance support is relatively high.

Niu Yaoyang's maintenance team has been strengthened, and is responsible for the support of No. 533 and No. 501. He has guaranteed the J-16 that has been tested in actual combat, and the J-15, which has not been completely finalized, could not be more counterpart.

When we arrived at the maintenance hangar, the avionics engineer was already there, frowning at the inspection equipment. The avionics engineer is not a small cadre, it is a Navy colonel who is almost 50 years old, and he is the deputy chief engineer in charge of technical support. Li Zhan hurriedly saluted and said hello, but the avionics colonel wearing glasses waved his hand to signal him to come and see.

"The test results are normal, but." The avionics colonel pointed to the curve, and the content displayed on the screen was like the content measured by the hospital's vital signs detector, and said, "If you pay attention to this small section of the line, the amplitude of the fluctuation is very small, it looks like a normal straight line, and if you don't pay attention to it, you will ignore it." I haven't encountered this before. ”

Li Zhan took a closer look and asked, "Is the detector normal?" ”

Niu Yaoyang replied, "This is the third station." ”

"It's the fourth one, I changed it again, and the feedback is the same." Avionics Colonel said.

Li Zhan guessed that eighty percent of the problems were caused by the birth defects of this fighter, and asked, "Can you find out?" ”

The avionics colonel said decisively, "No, we need people from the manufacturer, and we can't do such an investigation." ”

After pondering for a moment, Li Zhan said, "This plane can no longer be used until the problem is found, and we must figure out what the problem is." Contact the manufacturer and ask them to send someone. ”

"Yes." Niu Yaoyang nodded.

The avionics colonel pushed his glasses with a frown, and said in a deep voice, "Vice President Li, I suggest that all two-seater aircraft and single-seater aircraft using the same flight control system should be comprehensively investigated, focusing on the flight control system. ”

"It's not necessary, is it?" Li Zhanyou said, "We can't finish it in ten days and half months, and we don't have so much time." ”

It has already entered August, and there are only about 50 days left to fight and complete, and the fact that more than half of the fighters cannot be used is equivalent to directly announcing that the rate of troops on board ships is not up to standard.

Niu Yaoyang also held the same opinion, "I have seen the past maintenance records, and a comprehensive inspection has been done in the first half of the year, and I don't think there is any need for large-scale testing." ”

Full testing is prescribed, and frequent testing is also not permitted.

The avionics colonel said worriedly, "That's a normal situation, but now is an abnormal period, Vice President Li, you calculate how many hours you fly every day, all the fighters are used at high intensity, and you can't look at it with normal eyes." I still insist on recommending a comprehensive inspection of the same batch of fighters, and the manufacturer has a team to find a way to shorten the time. ”

"No matter how short it is, it will take at least a week." Li Zhan shook his head slightly, pondering.

After a while, he made a decision and said, "In this way, you try to find a way to check, and at the same time contact the manufacturer and ask them to send someone over." Tonight, I will work overtime to test all the fighters that will fly tomorrow. ”

"The fighters that will fly tomorrow have all been overhauled." Niu Yaoyang said.

Li Zhan pointed to the display screen of the detector and said, "Is this also the case?" ”

"No, this is only the case in the Five Caves." Niu Yaoyang said.

Li Zhan breathed a sigh of relief, "That's good, let's work hard to find out the problem of the five caves." ”

"I'll figure it out," said the avionics colonel, "but I still recommend that you consider my suggestion." ”

He is a technical cadre, and a high rank represents a high technical level, but the administrative power is not comparable to that of the deputy chief teacher. Li Zhan has the right to adjust the flight training plan and determine which fighters will participate in the training, and if the fighters do not obviously show signs of problems, it is also up to him, the unit commander, or the chief instructor to decide whether or not to conduct advanced testing.

On the other hand, because the detection and feedback of the No. 501 fighter is unprecedented, maybe it is a problem or not a problem, the avionics colonel has no way to determine, and there is no standardized guidance, and the judgment made by relying on experience and feeling cannot be recorded or used as a basis.

So he couldn't hold on either.

If it is only an error in a specific situation caused by the link between the instrument and the fighter in the process of detection, it is also a major matter to delay the combat training of the troops.

Li Zhan said to the avionics colonel, "I am very familiar with the flanker, and I have also encountered flight control failures. What I can be sure of is that this very small difference now is not a symptom of a flight control system malfunctioning. You expand the range, and then check the control program, or other errors. ”

"Okay, I'll focus on checking the control procedures." The avionics colonel nodded slightly.

Li Zhan didn't leave, and followed the avionics colonel to carry out the following testing work. He was able to win the admiration of all officers and men, not only because of his ability to pull rods, but also because he was very familiar with the fighter overhaul business. This is due to the fact that he has been mixed with the aircraft maintenance detachment to provide support when he has free time since he was in the lower unit, and he can solve some ordinary problems by himself as long as he has the right tools for all the fighters he has flown up.

Even the deputy chief engineer could not identify the suspected problem symptoms, and Li Zhan certainly did not have the ability to find out the cause. However, it was not impossible, Li Zhan called the second division on the spot to find a building. Hainan Airlines does not have a Su-27SK, and the most experienced fighters of this type are the 2nd and 300th Divisions, while Lou Yiwang is a Nana-level mechanic of the Su-27SK model.

After explaining the situation, Li Zhan asked, "Old Building, this slight abnormality in the flight control system is actually a problem with other systems, do you think there is such a possibility?" ”

Lou Yiwang said with certainty, "No." Su Liangqi's flight control system is very complicated, and the complexity I am talking about is not technical complexity but design complexity. Longitudinal fly-by-wire plus transverse mechanical transmission, longitudinal fly-by-wire is still a design added later, resulting in a complex and cumbersome transmission system. It is precisely for this reason that Su Liangqi's transmission system is very independent, if it is an abnormality in this system, then the problem must be in itself, and the problem feedback of other systems will not be reflected in the flight control system. ”

Li Zhan recalled the scene where he had encountered the failure of the flight control system before, his brain spun quickly, and he nodded slowly, "I understand, so I can only find problems on the flight control system." ”

"Brother Yi, this is really hard to find. Let me tell you this, Shen Huoyi has not been able to fully figure out until now, is Shen Huoyi's technical level not enough, no, but this kind of problem cannot be analyzed by reverse logic, for example, the designer turned at a crossroads, you have to face three directions to find back, and one direction may take twenty or thirty years to eliminate. ”

Lou Yiwang said in a deep voice, "I suggest that the manufacturer be asked to test it, although they have not been able to figure out the whole state, they are definitely better than the troops." But I don't think there's any need to worry too much, how many years has the second division used Su 27, and that batch of Su 27 is still in use, don't you fly the same. ”

Li Zhan shook his head helplessly, and said with a wry smile, "Didn't Shandong drop a UBK in the first half of the year, it was this flight control system that had a problem, and we had already conducted a big investigation at that time, and it was normal." I'm really relieved about this tiny anomaly tonight. ”

After pondering for a while, Lou Yiwang proposed another possibility, "You run out of oil and test it again." ”

"Jet fuel?" Li Zhan was surprised, "Does it have anything to do with aviation fuel?" ”

Lou Yiwang said, "I encountered an incurable disease before, and the masters of the manufacturer at that time came and failed to find the problem. Later, I ran out of oil for safety reasons, and when I tested again, I found that the abnormality was gone. There is no problem with jet fuel, but the test results are abnormal when jet fuel is present, and there is no problem with the fighter itself. ”

"I see what you mean, can't you? It's also incredible. Li Zhan shook his head.

Lou Yiwang said with a smile, "I was promoted after I made a meritorious service because of that incident." By the way, have you forgotten about the landing gear? ”

"I remember, you just knocked a few hammers." Li Zhan said with a smile.

Lou Yiwang said, "Su Liangqi's flight control system technology is not complicated, it should be said that it is relatively simple and crude, at that time, Lao Maozi was limited by conditions and rushed to equip the troops, so he directly cut half of the mechanical transmission and changed it to flyby, resulting in the whole device is very cumbersome, and has to take the fuselage structure to drill holes to reduce weight." In terms of avionics, they don't have such advanced technology, and we think too much about them and it is easy to make detours. ”

"I see, your idea is very fresh, I'll give it a try right away, okay, then don't bother for now." Li Zhan said.

Lou Yiwang said with a smile, "It's okay, during this time, I am relatively idle in training recruits, and I can call at any time if I have something, and I often soak in the office." ”

"Okay."

Putting down the microphone, Li Zhan strode over and said to the avionics colonel, "I consulted the old mechanic of the Second Division, and he provided an idea. If there is really no way to find the problem from the flight control system, it is recommended that we test it after refueling. ”

"Oil?" The avionics colonel quickly thought for a moment and slapped his head suddenly, "That's right! Drain the oil! ”

After finishing speaking, he threw down Li Zhan and quickly arranged it, and then quickly checked the in-flight aviation fuel situation when other fighters were inspected. Li Zhan couldn't help anymore, and watched the avionics colonel get busy walking like he had won the jackpot.

The fuel in the wings and fuselage was quickly unloaded, and the avionics colonel tested it again, and the result was amazing, the small fluctuation disappeared!

Li Zhan was still thinking about the relationship between aviation fuel and the flight control system, and the avionics colonel came over with a stack of maintenance orders in his hand, with a red face, standing beside Li Zhan and pointing to the No. 501 fighter and saying, "It's a problem with aviation fuel, the aviation fuel itself is fine, and there is a problem if the aviation fuel in the wing fuel tank exceeds a certain amount, you see, when other fighters inspect the wings, there is only a small amount of aviation fuel or even no aviation fuel, and the wings of No. 501 are almost full." ”

After taking the maintenance order and browsing it, Li Zhan said, "That's right, there is indeed such a difference. But how can the presence of jet fuel in the wings affect the test results? ”

The avionics colonel smiled and spit out two words, "Weight." ”

"Weight?" Li Zhan was stunned for a moment, and then suddenly realized, damn it!

The avionics colonel said as if in his acceptance speech, "Yes, the weight caused the wing to sag and affected the inspection results, and the fighter itself is fine, but our inspection process is problematic." The J-15 is a folding wing, and the addition of a folding device has led to a relatively large wing weight, plus two or three tons of aviation fuel, and the state of the fighter does not meet the state required for testing, so it has led to a slight deviation. ”

He gave Li Zhan a thumbs up, "The old mechanics of the Second Division are very experienced. ”

"He is indeed very experienced, and he has guaranteed that Su is in his seventies, and this phenomenon was first discovered by him." Li Zhan admired it very much and said sincerely.

Sometimes experience really works better than technology. You think it's a calculus problem, and it turns out that one plus one equals two. If Li Zhan hadn't called Lou Yiwang, then according to the normal procedure, he would have to invite someone from the manufacturer, and then the fighter would have to be spent in the maintenance hangar for a comprehensive inspection, not to mention that it would cost more resources to delay the training, and this could not guarantee that it would be found out smoothly.

Maybe in the end, it will take a highly skilled pilot to go up to the sky to actually test it, and then land and the jet fuel is almost consumed, and then test, yes, normal. The problem is solved, but what about the problem?

Why can a very small number of sixth-term noncommissioned officers of the age of a soldier work in the army until retirement, Lou Yiwang was a high Chinese basis back then, so he was successfully promoted, otherwise he would also be a noncommissioned officer to the end.

These people may not have a brilliant theoretical level, but the practical skills and experience are absolutely at the pinnacle. There was an old non-commissioned officer of the sixth phase of the naval unit, and there was a problem with the power system of a certain ship, and the high-tech team with all kinds of advanced testing instruments was helpless, so they invited him over.

That's how God is.

There is also a non-commissioned officer of the sixth phase of the mechanic in the army aviation unit, to what extent, the helicopter manufacturer has improved it according to his technical papers, and has improved more than a hundred ways! That's a soldier who only had a beginner's Chinese when he joined the army! When it was time for his service, in order to keep him, his unit directly changed the system for him!

It's that awesome.

These people are the real kings of soldiers.

PS：48000/84000