"3·21" China Eastern Airlines MU5735 passenger flight accident investigation progress latest report released (second anniversary)

News from this site on March 20. On March 21, 2022, a China Eastern Airlines Boeing 737 passenger plane lost contact over Wuzhou while performing a flight from Kunming to Guangzhou. It was later confirmed that the plane crashed. The aircraft was China Eastern Airlines flight MU5735, with a total of 132 people on board, including 123 passengers and 9 crew members.

On the second anniversary of the accident, the Civil Aviation Administration of China today issued a report on the progress of the investigation into the accident of China Eastern Airlines flight MU5735. The following is the original text of the notification attached to this site:

On March 21, 2022, the Boeing 737-800 passenger aircraft (registration number B-1791) of China Eastern Airlines Yunnan Co., Ltd. performed flight MU5735 from Kunming Changshui Fly to Guangzhou Baiyun Airport. The plane took off at 13:16 that day, but about 64 minutes into the flight, it suddenly deviated from its cruising altitude of 8,900 meters, descended rapidly and finally crashed near Motuo Village, Teng County, Teng County, Wuzhou City, Guangxi Zhuang Autonomous Region. The accident killed all 123 passengers and 9 crew members on board.

In accordance with the regulations of the Civil Aviation Administration of China and the relevant provisions of the Convention on International Civil Aviation, the Civil Aviation Administration of China has launched a technical investigation into this incident with relevant departments. The main progress of the investigation is as follows:

1. Search, identification and analysis of wreckage. Organize and carry out a search for wreckage evidence, identify the main wreckage, take photos and collect evidence, mark the location where it was found, and prepare a distribution map of the wreckage location; conduct a special technical investigation of the aircraft structure, flight control system, engine and other wreckage, and analyze the aircraft's attitude and key control components before it crashed to the ground. Possible working status; send important debris such as engine components and control system components to the laboratory for analysis to determine the cause of damage.

2. Flight operations and aircraft airworthiness conditions. Investigate the crew members' technical status, health status, actual performance and other personal conditions; investigate the flight's release plan, load balance, performance calculation, operation monitoring, crew preparation and other operational conditions; investigate the company's safety management, training management, personnel qualifications Management, maintenance management and other organizational management conditions; investigate the implementation of aircraft airworthiness instructions, service bulletins, route and scheduled inspection maintenance, fault retention and other maintenance conditions; conduct investigation and analysis of the fuel filling and fuel quality of the flight in question; integrate monitoring data, Video recording, etc., to analyze the flight status of the aircraft in the final stage; repair the damaged recorder and analyze the acquired data.

3. Flight guarantee situation. Conduct an investigation into the qualifications of support personnel and the working conditions of facilities and equipment at the departure airport; conduct an investigation into the daily inspection and maintenance of runways, taxiways, taxi routes, and apron surfaces used by the flight where the incident occurred; conduct an investigation into the qualifications and communications of air traffic control personnel Conduct investigations on navigation monitoring equipment and air traffic control automation systems, air traffic control command processes, and route weather conditions; conduct investigations on basic information about passengers, baggage, cargo, and mail, security inspection conditions, and loading conditions; verify the dangerous goods carrying information and crew of the flight where the incident occurred and the dangerous goods training status of relevant security personnel.

After investigation, the flight crew and cabin crew of the incident flight held valid licenses and certificates, their flight, duty and rest times met the regulations, they passed the health examination before the flight on the day, and the crew qualifications and configuration met the requirements; the airworthiness certificate of the aircraft involved was valid , the qualifications of the relevant maintenance personnel meet the requirements; no faults or abnormalities were found in the aircraft system, fuselage structure, engine, etc. before takeoff, and no faults are retained; the qualifications of the relevant operation support personnel at the departure airport meet the requirements, the facilities and equipment are working normally, and the operations are The operation complied with working procedures; the qualifications of relevant air traffic control personnel met the requirements, the communication, navigation and monitoring equipment worked normally, there were no abnormalities in radio communications and control commands before the incident, and there were no dangerous weather reports in the airspace and route flight level where the aircraft was located at the time of the incident; The cargo on the outbound flight complied with the requirements, there was no cargo or mail declared as dangerous goods, and there was no evidence that there were dangerous goods in the cargo or luggage.

The technical investigation team will continue to conduct experimental verification and cause analysis, and release relevant information in a timely manner based on the progress of the investigation.

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