After the specially arranged alert patrol ended, the pilots who participated in the training today immediately conducted landing training. The advantage of the large fuel capacity in the J-15 was highlighted. Under normal fuel loading conditions, it can continue training for two or three hours, but sometimes it does.
Because the endurance is too long, in order to reduce weight, I often only carry half the fuel.
A solid afternoon of training ended. As usual, it was time to analyze the flying parameters and summarize experience. After that, it was time for dinner. After dinner, I watched the news broadcast. During the period, Niu Yaoyang came over and stood at the door of the officer's club audio-visual room. Li Zhan waited.
Come out and talk to him in the corridor outside.
Niu Yaoyang reported, "Boss, there is something wrong with the plane. I'm not sure about the specific cause. You'd better go over and have a look."
"Is it a five-hole unit?" Li Zhan asked with a frown.
"Yes."
Li Zhan hurriedly went to the maintenance hangar with Niu Yaoyang. Fighter No. 501 will fly for more than ten hours tomorrow, so the maintenance department will conduct a comprehensive inspection of it tonight to ensure the safety of tomorrow's flight. Because the two-seat aircraft is still not enough
, so the existing two-seat aircraft are very intensively used, especially the No. 501. This fighter has to fly at night and land on ships at night, and its usage intensity is almost twice that of other fighters.
The reason why Li Zhan directly asked about the flight control is because the two-seat aircraft, like the earliest batch of J-15s, is 100% original imitation, non-domestic avionics, non-domestic flight control, exactly the same as the J-11a. It is used extensively.
Experience has proven that when su-27sk and J-11a fighters are used intensively, special attention should be paid to the status of the flight control system.
So far, the only J-15 fleet of the Flying Shark Force is No. 533 used by Li Zhan and the two latest ones entering service are new batches, using a new domestic avionics system and a new full fly-by-wire flight control system.
The rest of the fighter planes are still the same, so the pressure on maintenance is relatively high.
The maintenance team led by Niu Yaoyang has been strengthened and is responsible for the support work of No. 533 and No. 501. He has provided support for the J-16 that has been tested in actual combat, and he is the perfect match for the J-15 that has not been fully finalized.
When we arrived at the maintenance hangar, the avionics engineer was already there, operating the testing instruments with a frown on his face. The avionics engineer was not a junior cadre, he was a naval colonel who was almost fifty years old and was the deputy in charge of technical support.
Chief Engineer Li Zhan quickly saluted and said hello, but the avionics colonel wearing glasses waved his hand for him to come over and take a look.
"The test results are normal, but..." the avionics colonel pointed to the curve. The content displayed on the screen was like what was measured by the hospital's vital signs detector, and said, "Pay attention to this short section of the line. It's undulating.
The amplitude is very small, it looks like a normal straight line, and you will miss it if you don't pay attention. I have never encountered this situation."
Li Zhan looked at it carefully and asked, "Is the detector normal?"
Niu Yaoyang replied, "This is the third channel."
"It's the fourth one. I changed it to another one, and the feedback is the same." said the avionics colonel.
Li Zhan guessed that it was probably a symptom of the problem caused by the fighter's congenital defect, and asked, "Can it be found out?"
The avionics colonel said decisively, "No, we need someone from the manufacturer. We can't do such an investigation."
After pondering for a moment, Li Zhan said, "This aircraft can no longer be used until the problem is found. We must find out what the problem is. Contact the manufacturer and ask them to send someone."
"Yes." Niu Yaoyang nodded.
The avionics colonel frowned, pushed up his glasses, and said in a deep voice, "Vice President Li, I suggest that a comprehensive investigation be conducted on all two-seat aircraft and single-seat aircraft that use the same flight control system, focusing on the flight control system.
.”
"Isn't it necessary?" Li Zhanyou said, "It would take ten and a half days to finish it. We don't have that much time."
August has already entered, and there are only about fifty days left to complete the battle. The unavailability of more than half of the fighter planes directly declares that the troop embarkation rate is unqualified. This kind of backward thinking cannot occur under any circumstances.
Niu Yaoyang also held the same opinion, "I have read the past maintenance records and a comprehensive inspection was conducted in the first half of the year. I think there is no need to conduct large-scale inspections."
Comprehensive testing is regulated, and frequent testing is also not allowed.
The avionics colonel said worriedly, "That is a normal situation, but now is an abnormal period. Vice President Li, please calculate how many hours you fly every day. All fighters are used at high intensity. You cannot use normal eyes."
Let’s take a look at it. I still insist on recommending that all fighters of the same batch be fully inspected, and that the manufacturer form a team to find ways to shorten the time.”
"No matter how shortened it is, it will still take at least a week." Li Zhan shook his head slightly and pondered.
After a while, he made a decision and said, "In this case, you try your best to find out, and at the same time contact the manufacturer and ask them to send someone over. Work overtime tonight to test all the fighters that will fly tomorrow."
"The fighter planes that will fly tomorrow have all completed their maintenance," Niu Yaoyang said.
Li Zhan pointed to the display screen of the detector and said, "Is this also the case?"
"No, this happened only in the fifth hole unit." Niu Yaoyang said.
Li Zhan breathed a sigh of relief, "That's good. Let's all work hard to find out the problem with the five holes."
The avionics colonel said, "I will find a way, but I still suggest you consider my suggestions."
He is a technical cadre. A high military rank represents a high technical level, but his administrative power is not as good as that of the deputy chief instructor. Li Zhan has the right to adjust the flight training plan and determine which fighter planes will participate in the training. When there are no obvious problems with the fighter planes,
In the case of symptoms, it is also up to him or the unit commander or chief instructor to decide whether to conduct advanced testing.
On the other hand, this kind of detection feedback of fighter No. 501 is unprecedented. It may be a problem or not. The avionics colonel has no way to determine, and there is no standard guidance. The judgment made based on experience and feeling is
What cannot be written into the record cannot be used as a basis.
So he couldn't persist.
If it is just an error in a specific situation caused by the link between the instrument and the fighter during the detection process, it will also be a big deal if it delays the combat training of the troops.
Li Zhan said to the avionics colonel, "I am very familiar with Flanker and have also encountered flight control failures. What I am sure of is that this extremely small difference will not be a symptom of flight control system failure. Please expand the scope.
Check the control program again, or there may be errors caused by other aspects."
"Okay, I will focus on checking the control procedures." The avionics colonel nodded slightly.
Li Zhan did not leave, and followed the avionics colonel to conduct the following inspection work. He was able to win the admiration of all officers and soldiers not only for his ability in pulling rods, but also for his familiarity with fighter aircraft maintenance business. This was due to his availability since he was in the army.
He just hangs out with the maintenance team to provide support. For any fighter plane he has flown, he can solve some common problems by himself as long as he has the right tools.
Even the deputy chief engineer could not identify the symptoms of a suspected problem. Of course, Li Zhan was unable to find out the cause. However, it was not impossible. Li Zhan called the Second Division on the spot to find out. Hainan Airlines does not have su-27sk, this type of fighter aircraft.
The ones with the most experience in using them are the Second Division and the Three Hundred Division, while Lou Yiwang is a master-level mechanic of the Su-27sk model.
After explaining the situation, Li Zhan asked, "Lao Lou, 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. What I mean by complexity is not complicated technology but complex design. Longitudinal electric transmission plus horizontal mechanical transmission, longitudinal electric transmission is still a design added later.
, resulting in a complex and bulky transmission system. It is precisely for this reason that Su Liangqi's transmission system is very independent. If there is an abnormality in this system, then the problem must be with itself, and feedback from other systems' problems will not be reflected in the flight control system.
"
Li Zhan recalled the scene in which the flight control system failed before, his mind started spinning rapidly, and he nodded slowly, "I understand, so we can only find problems in the flight control system."
"Brother Yi, this is really hard to find. Let me tell you this, Shen Hoy still hasn't been able to fully understand it. Is it because Shen Hoy's technical level is not good enough? No, it's because there is no way to solve this problem through reverse logic.
To analyze, for example, if the designer turns at a crossroads, if you go back in the opposite direction, you have to face three directions, and it may take twenty or thirty years to eliminate one direction."
Lou Yiwang said in a deep voice, "I suggest asking the manufacturer to test it. Although they haven't figured out the entire situation, they are definitely better than the army. But I don't think there is any need to worry too much. The Second Division has been using Su Liangqi for how many years.
Those batches of Su Liangqi are still in use, so they can still fly."
Li Zhan shook his head helplessly and said with a wry smile, "Didn't Shandong crash a UBK in the first half of the year? There was something wrong with the flight control system. We had already conducted a major inspection at that time, and it was all normal. This tonight
I’m really worried about minor abnormalities.”
After pondering for a while, Lou Yiwang suggested another possibility, "Drain all the oil and test it again."
"Aviation fuel?" Li Zhan said in surprise, "Is it related to aviation fuel?"
Lou Yiwang said, "I encountered a difficult disease once before. At that time, even the experts from the manufacturer came and could not find out the problem. Later, I drained the oil out of consideration for safety issues. When I checked again, I found that the abnormality disappeared.
"There is no problem with the aviation fuel, but the test results when there is aviation fuel are abnormal, and there is no problem with the fighter aircraft itself."
"I understand what you mean, can't you? This is too incredible." Li Zhan shook his head.
Lou Yiwang said with a smile, "I was promoted because of my meritorious service in that matter. By the way, have you forgotten about the Dongsanguai landing gear?"
"I remember, you just need to hit the hammer a few times and it will be fine." 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 restricted by conditions and rushed to equip the troops, so he directly cut half of the mechanical transmission and replaced it with telex.
As a result, the whole device was very bulky, and we had to drill holes in the fuselage structure to reduce weight. In terms of avionics, they do not have such advanced technology, so if we think too much about them, we will easily make detours."
That's how awesome it is.
There is also a sixth-term mechanic non-commissioned officer in the Army Aviation Force. How awesome is it? The helicopter manufacturer made improvements based on his technical papers and made more than a hundred improvements! That was a soldier who only had a junior high school diploma when he joined the army! By the time he entered the service
His age has expired. In order to keep him, his army directly changed the system for him!