China Eastern Airlines crash plan searched the black box overnight, what information was recorded i

The black box is very important, because the entire flight data information can be recorded in the black box, and the flight box can also record the entire flight call information, and the entire flight process can be recorded through voice and data.

The black box is a key equipment for recording information in the aircraft, which can find out the cause of the aircraft crash or aircraft accident at a critical time.

1. Flight data information.

Because the aircraft has a lot of data to record in the flight process, and the data to be recorded is the black box of the aircraft, the black box is located inside the aircraft, and the data information recorded by it, including the flight altitude of the aircraft, the speed of the aircraft flight and the flight time, as well as various index information, these information can be recorded through the aircraft black box, and the recorded information is relatively accurate, and the change of data and the entire itinerary can be recorded almost every hour and every second. <>

2. Flight voice information.

The black box on the aircraft can also record the call data of the whole flight, generally can record the call data of the flight attendant, and the call of the flight attendant can be transmitted to the black box in various ways during the whole flight, and the black box can be used as a record for the whole flight, which can play a key role, because the voice recording can almost do more real and reliable information, and can restore what happened at the scene and what the flight attendants did. <>

Third, the importance of the black box is very great.

Since the black box can record the call information and data information on the aircraft, it is conceivable that the importance of the black box is very great, because the black box can almost restore what happened inside the entire flight process, although the black box can not be recorded**, **recording requires great technical considerations, and it is not yet reached, but it is enough to have voice data and flight data information to verify what happened at the scene, so why every time the plane crashes, It takes more manpower and material resources to find the black box. <>

Flight data, footage before the crash, the cause of the accident, conversations with the airport staff, and last-minute footage were recorded, so the cause of the crash was known only when the black box was found.

Aircraft voice recordings and flight instrument recordings. Voice messages are the sounds of people on the street. Instrumental records are of the aircraft facilities prior to the crash.

The first black box was discovered on March 23. On the evening of the 23rd, the director of the Aviation Safety Bureau of the Civil Aviation Administration said at a press conference that the appearance of the black box was seriously damaged. Subsequently, the National Flight Accident Emergency Command of China Eastern Airlines announced at a press conference that the data** and analysis of the first black box are underway, and the possibility of damage to the storage unit due to the damage of the aircraft cannot be ruled out.

But progress seems to have been faster than expected.

The black box, also known as a flight recorder, can provide investigators with information about how the plane flew before the crash. It is an important piece of evidence for accident analysis** and data for making the right judgment about the accident**. The black box consists of two separate components:

Flight data recorder and cockpit voice recorder. The flight data recorder can record the state that the aircraft should be in at the moment. The cockpit voice recorder records the audio recording of the cockpit of the aircraft.

The cockpit voice recorder ensures that the pilot gives the command, and the flight data recorder ensures that the system receives the command and converts it into a control signal".

The investigation of the cause of the plane crash requires a scientific and rigorous process, and it also needs to be supported by various key evidence. In general, weather factors, operator errors, mechanical failures, external damage, etc. can cause air crashes.

Therefore, we need two black boxes to verify each other. From the cockpit voice recorder that has been found, we can verify that the flight crew has not made a mistake or suffered external damage, while the flight data recorder can show us the weather conditions and mechanical problems at the time of the incident.

The flight data recorder can record more than 60 kinds of data, of which 20 important data must be recorded, such as acceleration, fuel volume, control surface position, etc., which are important data to judge the operating status of the aircraft at the time of the accident, so the second black box may play a key role in analyzing the cause of the accident.

A search team carried out manual fine excavation operations at a position 5 degrees south-east of the impact point in the core area and 40 meters from the impact point. When fire and rescue personnel dug to a depth of about a meter below the surface, they found a cylindrical metal tank wrapped in dirt after turning over a tree root. It was then quickly handed over to civil aviation experts for identification and confirmed to be the second black box of the crashed aircraft.

When the fire rescue personnel dug to a depth of about a meter below the surface, they found a cylindrical metal canister covered in dirt with only a little orange exposed. After the dust on the surface of the metal tank was purged and cleaned, a clear English logo was revealed. Subsequently, the metal tank was quickly handed over to civil aviation experts for repeated identification, and it was confirmed that it was the second black box of the crashed plane.

It was found in the core area of the plane crash meters underground, and the exterior looks intact, but the base is missing and is being further cracked.

On March 28, 2022, the relevant departments held a press conference on the major air crash of China Eastern Airlines on March 21, saying that on the 28th, the DNA of all 132 people on the crew had been compared with the black box that completed the crash. Therefore, many people are very puzzled, why have all the black boxes been found, and the search is still ongoing? Because the black box was badly damaged when it was found, the searchers could only continue to work to help the experts better judge the posture of the plane when it landed.

1. The black box in the China Eastern Airlines crash has been found

Through the search staff day and night search for the two black boxes, they have also been found one after another, so the relevant personnel also hurriedly sent these black boxes to the professional laboratory, and the relevant staff are also deciphering the two black boxes. According to the introduction of professionals, the decipherment of the black box generally only needs to be connected to the power supply, and then connected to the special decoding equipment, you can decipher the contents through the ** data, if the black box is intact, the whole process only takes about three or four hours. <>

However, due to the seriousness of the air crash, the search and rescue personnel found the black box when it was very damaged, and now the black box found is only some memory chips and storage units, and the base is gone. Therefore, after the black box is taken to the laboratory, it has to be dried and cleaned, and even dismantled work, and if there is a problem with the chip, it will have to be repaired later, so it takes a long time. <>

2. Why the search is still ongoing

Although the black box is very helpful in this air crash, the wreckage of the plane also has a great role, searching for more wreckage and understanding the distribution of the wreckage, which is conducive to experts to better understand the attitude of the plane when it lands and the angle and strength of the impact. There may also be some important evidence in the wreckage, such as the power of the engine, the position of the operating surface, and the later can be compared with the flight data recorder.

At present, the two black boxes are seriously damaged, and what has been found is actually a memory chip unit, and the base of the black box is gone, so the search is still ongoing.

Because the search work is not only to find black boxes, but also to find some human tissues of the victims, to find some relics, and also to find some aircraft fragments, as far as possible to avoid missing them.

Analyzing the data of this black box, it will take about three days at the shortest, which is also for the degree of damage to the black auction hall box, if the damage is relatively large, it will take about a week, and it will take even longer.

The shortest time is about half a month, and if the black box is seriously damaged, it may reach about three months to five months.

It may take a few weeks, but the exact situation has not been released to the public, and it is unclear whether the data has been damaged.

I don't think it's very difficult to search for the first black box, after all, this black box doesn't have a specific drop location, and the relevant departments have also expanded the search area, but because of the impact of the weather at that time, the search was difficult, and after a long time, the existence of the first black box was discovered.

The search process is particularly difficult, and it is all slowly searched by the searchers with their hands, little by little.

The searchers used the grid deployment method to search in shards, and also used reconnaissance equipment.

The <>black box" is one of the electronic recording devices dedicated to aircraft, and its real name is Aviation Flight Recorder. Record the flight status of the aircraft and all the associated data. The so-called black box is not black, just a nickname.

It will only be exposed when the plane crashes, providing people with the situation encountered before the plane accident, the pilot's call, and providing clues for people to analyze the cause of the plane crash.

A black box usually refers to a part of an aircraft that is used to record flight data and cockpit voice. When a plane crashes, finding the black box can accurately determine the cause of the accident. Therefore, the black box is also very resistant to high temperature, impact, waterproof and corrosion.

The black box is often a combination of FDR and CVR. FDR is Flight Data Recorder, CVR is Cockpit Voice Recorder. However, CVR data is now stored together with FDR data, collectively referred to as FDR or FR.

At the same time, there will also be an underwater locator beacon ULB on it, when the plane crashes, the underwater locator beacon will start to transmit signals when it encounters water, and it can be continuously launched for 30 days. Let's talk about the power of the black box. The black box can last for half an hour in a 1100-degree fire, can resist the impact of 2000 g, and can withstand hundreds of tons of heavy pressure.

It can be said that even a piece of iron cannot remain intact under the above conditions.

However, there is not much data stored at present, and it can usually only store the flight data of the last 25 hours, including aircraft load, attitude, engine thrust, control surface position, pilot's operation instructions, altitude, speed, heading, etc. and 2 hours of cockpit voice, because the voice signal is converted into digital form is also relatively large, which occupies more memory. At the same time, only the last two hours of speech are the most critical.

Overall, the black box is still the most economical and reliable disaster recording solution at the moment.

Recorded the entire plane's action track hall laughter, so that we have a more intuitive and comprehensive understanding of the cause of the crash, only he can let me know what happened at that time, let us understand the cause of the accident, to all the victims of an explanation, its importance is self-evident.

The black box will record the voice data of the aircraft, and will also record some flight data, which will let us know what happened before the plane crash, will also tell us the reason for the crash, and can also help us judge whether the same type of aircraft has the same type of aircraft with the same limb or similar safety hazards.

The black box includes the record of flight data and the record of language, through the Chang nuclear data in the black box, you can understand the flight altitude of the aircraft, the condition of the engine and the lack of other data, which plays an important role in studying why the plane crashed.

It is because the black box can record all the data of the aircraft obtained at the time of the accident, and the flight altitude or flight resistance or flight speed at that time can also be recorded during the flight process.

On March 27, the second black box of the 321 China Eastern Airlines flight accident passenger plane has been found, and was sent back to Beijing by the flight at one o'clock in the afternoon of the same day, according to the reporter in front of the front desk, the second black box tank that was found is relatively complete, and the on-site staff introduced that the location of the second black box was found in the emergency positioning transmitter installed near it, and the location found was very close, and the staff of the Civil Aviation Administration responded that the decipherment of the black box was slow, and it may take half a year. This is because the process of deciphering black boxes is very complex. <>

1. Why does it take up to half a year to decrypt the black box?

Some experts believe that the time to decrypt the black box has a great relationship with the degree of impact damage caused by the crash to the black box, and it is not easy to judge how long it will take to decipher it according to the current situation, and in history, it takes several months or even months for the black box to read the data, in fact, it depends on the degree of damage, and the staff of the Civil Aviation Administration of China publicly responded that it may take a few days to decipher the black box quickly, and it may take half a year if it is slow.

The reason why it may take up to half a year to decrypt the black box is that the whole process of reading the black box is very complex, for example, the analysis of the organization requires different professionals to analyze, and the evaluation of the analysis results also requires further collection of some information to confirm the inference, and then carry out experimental verification, simulation reproduction, etc. <>

2. What is the value of black box data?

Because the black box recorded some very important information about the China Eastern Airlines accident at that time, it can provide the air crash investigators with the flight status of the plane some time before the death and the moment of death, as well as the equipment on the plane, and the content of some staff conversations in the cockpit, which can be a very important basis for judging the cause of the plane crash, then you need to go through some data restructuring and repair tools, and the situation will be more complicated. <>