Xinhua news agency, Beijing, March 9 (reporter Qian Chunxian) - Malaysia Airlines mh370 flight accident disposal team leader said here in the early morning of the 9th that all search and rescue personnel are still unable to determine the whereabouts of the missing flight. So far, there is no evidence of the plane crash. (original title: missing Malaysia Airlines flight not found)
A Boeing 777-200 airliner of Malaysia Airlines from Kuala Lumpur to Beijing, China, lost contact in the early morning of August 8. The flight carrying 227 passengers and 12 crew members from 14 countries and regions has been out of contact for more than 20 hours. At about 1:30 am on the 9th, Malaysia Airlines held a second press conference in Beijing to inform about the loss of flight mh370. 'malaysia Airlines appeals to the people of Malaysia and the world to pray for flight mh370. More than 20 hours have passed since the flight was lost, and all search and rescue personnel have not been able to determine the whereabouts of flight mh370. '
According to reports, China, Malaysia, Singapore, Vietnam and the U.S. Navy have launched search and rescue or set sail for the relevant waters on the afternoon of August 8, but no evidence of the plane crash has been obtained so far. At present, the maritime search and rescue is still in progress, and the air search and rescue will continue after daybreak on the 9th.
"As soon as we receive the exact information, we will release it immediately. At present, the development of the situation is closely monitored. "The official said that all the passengers' immediate family members had been informed to wait in Beijing and Kuala Lumpur, and would do its best to assist the relatives, and Malaysia Airlines would bear all the travel arrangements and expenses.
Latest integrated broadcast: Malaysia Airlines lost flight working group held a press conference in Beijing: no evidence of plane crash
At about 1:30 a.m. on March 9, 2014, the business president and senior management representative of Malaysia Airlines said at a press conference held at the Guodu hotel in Beijing that the whereabouts of the lost flight mh370 had not been determined and there was no evidence of the plane crash. Malaysia Airlines had informed all the immediate family members of the passengers to go to Beijing and Kuala Lumpur to wait. Malaysia Airlines will bear all the expenses, and the families of passengers can Call 00861064376249 to find out. However, Malaysia Airlines did not directly answer questions about passengers boarding with fake passports and whether the oil stains on the sea surface belong to the flight, only saying that the information still needs to be further verified.
The senior management representative of Malaysia Airlines first released: "so far, we have not got the evidence of the plane crash. The search and rescue team at sea is still in progress, and the air search and rescue will resume tomorrow. Once we get the exact information, we will release it in time. Since most of the passengers are in China, Malaysian pacification teams and volunteers will also come to Beijing to work. Malaysia Airlines has informed the immediate family members of all passengers to go to Beijing and Kuala Lumpur to wait, and Malaysia Airlines will bear all costs. When the whereabouts of the aircraft are determined, family members will be arranged to go. We are also closely cooperating with the search and rescue work of Singapore, Malaysia, Vietnam and other countries. The family members of passengers can get information by calling 00861064376249. '
In response to the questions raised by reporters on the spot about whether passengers registered with fake passports and whether the oil stains on the sea belonged to the flight, the representative stressed that these information had not been confirmed and further verification was still needed.
In response to doubts that the family members did not receive enough help, he said that a total of 93 emergency action teams arrived in Beijing at 10:45 p.m. on the 8th, and they will do their best to do a good job in the work of their families.
Reporters at the scene continued to ask questions in both Chinese and English, but Malaysia Airlines did not answer them one by one. The senior management representatives of Malaysia Airlines once again apologized and promised to do their best to help their families and closely cooperate with the search and rescue work of Malaysia, Vietnam, the United States and China. After that, they left the scene in a hurry and there was no time for the next press conference.
Latest integrated broadcast: experts say the most likely reason for the loss of contact is the disintegration of the aircraft
Xu Yongling, international flight test pilot and air force test expert
Song Wenbin, associate professor, School of Aeronautics and Astronautics, Shanghai Jiaotong University
Zhou Jisheng, chief designer of Guangdong Changsheng Aircraft Design Co., Ltd
Ma Wei, lecturer, School of Aeronautics and Astronautics, Shanghai Jiaotong University
Latest integrated broadcast: experts say the most likely reason for the loss of contact is the disintegration of the aircraft
Malaysia Airlines mh370 lost communication with the control department and radar signal in the Ho Chi Minh control area at 1:20 am on the 8th, which is very rare. This reporter interviewed relevant experts, experts said that there are many possibilities for the loss of contact, but the most likely is the sudden disintegration of the aircraft in the air.
Beijing Times reporter Zhang Xiaoge, Han Xuping, Yifan, Xinhua news agency, CCTV report
Bad weather 1?
Meteorological factors have little influence on the altitude of 10000 meters
Song Wenbin, an associate professor at the school of Aeronautics and Astronautics at Shanghai Jiaotong University, said that when the plane suddenly loses power in bad weather, its communication system will be suddenly interrupted.
Zhou Jisheng, chief designer of Guangdong Changsheng Aircraft Design Co., Ltd., believes that according to the information disclosed, the accident plane lost contact with the ground after flying to the sea area between Malaysia and Vietnam nearly 40 minutes after taking off. Generally speaking, the Boeing 777 aircraft will reach the cruising altitude of 8000-10000 meters within 26 to 30 minutes after taking off, so from the perspective of the takeoff time and flight distance of the aircraft, the aircraft has reached the altitude of 10000 meters. In this case, although there will be some turbulence when flying at sea, the impact of weather factors on the aircraft is very small. So it's almost impossible for the plane to lose contact because of the weather. '
2 mechanical failure?
The possibility of failure of multiple communication systems is small
Ma Wei, a lecturer at the school of Aeronautics and Astronautics of Shanghai Jiaotong University, said that the special event was the sudden interruption of signals. Normally speaking, problems with the aircraft engine or the speed measurement system may lead to the failure of the communication system, but it is impossible to completely cut off the signal in a short period of time, which can still be maintained for a period of time.
If there is a problem with the aircraft engine, it may affect the operation of the communication system, because the engine will provide power and other related energy support to the communication system, but the aircraft engine will store part of the electrical energy, even if there is a problem, the communication system can not be completely cut off. At the same time, the plane was equipped with dual engines. Even if one engine lost its power, the working time of the other engine was longer than 180 minutes. Therefore, from a professional point of view, there is little possibility of engine problems.
In addition, the speed measurement system may also lead to abnormal flight state. However, it is also possible to cut off the communication system artificially.
Zhou Jisheng said that there was more than one communication system on the plane, and there was little possibility that all of them would fail, so the ground would receive messages from the plane in any case. Even if all the communication systems fail, the aircraft can still fly to the airport relying on the navigation system, and the aircraft will be found in the flight area.
3 radar problem?
Multiple radars monitor the crash probability at the same time
Xu Yongling, an international meritorious test pilot and air force flight test expert, said that civil aviation now flies under the supervision of multiple radars. The information of a certain flight we see on the ground flight control is actually the best result of multiple radars tracking at the same time. Because each radar scanning frequency, if say every 20 seconds scanning, that point should be discontinuous. Now using multiple radars, continuous position determination can be obtained, including the determination of height and speed.
In addition, radar information does not need to be sent by the flight signal, which is a passive detection. Unless it is in the area without radar coverage, such as some remote areas, there may be a short-term loss of contact. Otherwise, if a flying object loses radar display at a certain time, it can only prove that it has disappeared from the air, and the probability of crash will be relatively large.
Crew 4 hijacked?
The operation of the alarm system is simple, and the probability of hijacking is not high
'we can't conclude now that it must not be a hijacking,' Mr. Xu said. But hijacking has a process. Generally speaking, hijackers should first control the crew, so the crew members will inevitably call the police. The second step is to control the flight crew, that is to enter the cockpit. The third step is to drive the pilot to do something he doesn't want to do. The pilot can press SOS warning system as soon as the hijacker is found. SOS is a general warning system for civil aviation. It is very simple to send signals without leaving the steering wheel. In this incident, we saw that the pilot did not send any warning messages. In addition, in order to prevent hijacking, civil aviation has a very safe design at the cockpit door, that is, once there is an alarm state, the cockpit will automatically lock. It is almost impossible for external personnel to forcibly enter the cockpit with tools such as axes and hammers. Therefore, the probability of a flight being hijacked is not very high.
5 the plane suddenly crashed or even disintegrated?
In the event of air disintegration, large aircrafts may not be able to alarm in time
Zhou Jisheng admitted that the most likely reason for the plane's loss of contact was that it suddenly disintegrated in the air, and the crew and all aircraft systems had no time to deal with the accident.
Song Wenbin agrees with this statement. Because of this, he said, there would be no chance for the crew to respond.
Xu Yongling pointed out that once the plane disintegrates, the seats, personnel and equipment (including luggage) will float on the sea, forming a large debris area in the relevant sea area, and the probability of large debris area being found is very high. Another possibility is that when the whole aircraft falls into the sea, the speed is very fast, resulting in explosion and disintegration and then sinking rapidly, so that the scattered area of debris will be relatively small.
So far, no national search and rescue agencies or search and rescue organizations have publicly announced that they have accurately identified and found the wreckage of the aircraft. Under such circumstances, we have to suspect that the plane did not disintegrate in a large area before it crashed.
Latest integrated broadcast: possible causes of aircraft disintegration
Latest integrated broadcast: possible causes of aircraft disintegration
The possible cause of the disintegration of the aircraft was the sudden encounter of bad weather
Xu Yongling said that according to the current information, the meteorological information is less and insufficient. At the time of the incident, we did not fully grasp the temperature of the area, the air flow at a height of 10000 meters, and whether there was a thunderstorm in the area. However, in case of bad weather, the aircraft may enter a dangerous state and even crash. However, today, both ground meteorological support and onboard equipment can easily identify dangerous weather and avoid it.
Song Wenbin said that the previous Air France accident was very similar to this one. At that time, there was thunderstorm and storm weather. After the plane flew to the thunderstorm area, there was a problem with the speed sensor. As a result, the speed data transmitted to the aircraft computer was wrong, and the computer made a wrong judgment, which eventually led to the plane falling into the sea quickly. However, at present, we have not seen the bad weather in the area before the aircraft lost contact, so it is difficult to make a specific judgment.
Pilot error
Xu Yongling said that it is possible that the pilot's control error may cause the aircraft to enter an uncontrollable state. However, civil aviation pilots are trained systematically. It is impossible for a pilot without professional flight ability to do passenger flight in commercial aviation. Because once the passenger flight problems, the consequences are very serious, so the choice of pilots