China's aviation regulator Civil Aviation Administration Of China (CAAC) has released the latest report to disclose the progress on the China Eastern MU5735 crash investigation, two years after the fatal accident took place.
On March 21, 2022, China Eastern Airlines Yunnan Co., Ltd. Boeing 737-800 passenger aircraft (registration number B-1791) performed scheduled passenger flight MU5735 from Kunming Changshui Airport to Guangzhou Baiyun Airport.
The plane took off from Kunming Changshui Airport at 13:16. 64 minutes later, it deviated from the cruising altitude of 8,900 meters and rapidly descended, crashing near Mochuo Village, Teng County, Teng County, Wuzhou City, Guangxi Zhuang Autonomous Region. All 123 passengers and 9 crew members on board were killed.
The release highlighted that a technical investigation team has carried out a great deal of work on the case including onsite inspection, personnel interviews and experimental analysis, but since the case is "very complicated and extremely rare," the investigation is still ongoing.
On the findings so far, the CAAC highlighted that the flight crew passed the health examination and had all the required qualifications before the flight , the release said ,
"After investigation, it was found that the flight crew and cabin crew of the incident flight held valid licenses and certificates, their flight, duty, and rest hours met the regulations, they passed the health examination before the flight that day, and the crew qualifications and configuration met the requirements."
There were no anomalies in the aircraft systems or structure , and the operations and maintenance personnel were adequately qualified for their scope of work,
"The aircraft's airworthiness certificate was valid and the relevant maintenance The personnel qualifications meet the requirements; no faults or abnormalities in the aircraft system, fuselage structure, engine, etc. were found before takeoff, and no faults are retained; the qualifications of the relevant operation support personnel at the departure airport on the day of departure meet the requirements."
As per the regulatory body, facilities and equipments to support the flight did not show any malfunction on that day, and the air traffic control personnel met proper functional requirements,
"The facilities and equipment are working normally, and the operations and operations are in line with the work procedures; the qualifications of relevant air traffic control personnel met the requirements, the communication, navigation and monitoring equipment was working normally, there were no abnormalities in radio communications and control commands before the incident."
The report added further that the weather on that day and in the airspace was not hazardous, also no dangerous goods were loaded in the cargo compartments,
"There were no hazardous weather reports in the airspace and route flight level where the aircraft was located at the time of the incident; the flight where the incident occurred was loaded Comply with the requirements, there is no cargo declared as dangerous goods, and there is no evidence that there are dangerous goods in the cargo and luggage."
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To reach to the latest progress results, the Civil Aviation Administration of China, in accordance with the relevant provisions of the "Technical Investigation Regulations for Civil Aircraft Incidents" (CCAR-395) of the Civil Aviation Regulations of China and the "Investigation of Aircraft Accidents and Incidents" in Annex 13 of the Convention on International Civil Aviation, worked with relevant departments to conduct technical investigations on this accident.
Civil Aviation Administration of China said in its release that the main progress of the investigation work had different domains , namely , Wreck search, identification and analysis , Flight operations and aircraft airworthiness and Flight guarantee situation , details of work are as below.
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.
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.
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.
Final statement in their release was about the assurance of continuation of investigation,
"In the future, the technical investigation team will continue to carry out experimental verification and cause analysis, and release relevant information in a timely manner based on the progress of the investigation."
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