Contact with the aircraft was lost over the city of Wuzhou.[11] At 14:22 (06:22 UTC), while approaching its top of descent into Guangzhou, the aircraft entered a sudden steep descent from 29,100 feet (8,900 m). It briefly leveled off and climbed from 7,400 ft (2,300 m) to 9,225 ft (2,812 m), but then plunged downwards again, reaching a final recorded altitude of 3,225 ft (983 m) at 376 kn (696 km/h) less than two minutes after the beginning of the descent, with a maximum descent rate of above 32,000 feet (9,800 m) per minute.[12]
At 14:23 (06:23 UTC),[2] the aircraft lost signal and crashed in the mountainous regions of Teng County causing a fire in nearby vegetation.[7][13][14] According to an astronautics and aeronautics professor at Massachusetts Institute of Technology, preliminary data indicated the aircraft traveled close to the speed of sound when it crashed. Data from Flightradar24 suggest it was traveling at speeds of 640 km/h (400 mph) and may have exceeded 1,126 km/h (700 mph) at the time of impact.[15] The aircraft's impact into the ground created a crater 100 ft (30 m) wide and 66 ft (20 m) deep, where most of the wreckage was discovered.[16]
Residents of the villages surrounding the crash site heard a loud explosion.[17] The final descent and crash was recorded by a security camera at the premises of a local mining company.[18] The video showed the plane in a near vertical dive seconds before it struck the ground. Footage from the crash site showed wreckage and a fire. Many smaller pieces of wreckage were scattered in the surrounding area.[19] All of the plane's occupants died.[20] It was the first fatal crash involving China Eastern Airlines since November 2004's Flight 5210.[21][22]
Some information channels such as at Kunming Changshui International Airport and Umetrip temporarily showed the flight had arrived due to not registering the flight's loss of contact. Others showed "loss of contact", "unknown", or a blanked-out status.[23][24][25]
The Civil Aviation Administration of China (CAAC) and the airline reported 123 passengers and 9 crew members to be on the flight, for a total of 132 people.[29][30] All were Chinese.[31] The occupants involved 74 families across 17 provinces of China.[32]
The flight crew consisted of three pilots, five flight attendants and an in-flight security guard. The pilots are:
32-year-old Captain Yang Hongda (Chinese, Traditional: 楊洪達, Chinese, Simplified: 杨洪达) had been employed as a Boeing 737 pilot since January 2018, with a total of 6,709 flight hours.
59-year-old First officer Zhang Zhengping (Chinese, Traditional: 張正平, Chinese, Simplified: 张正平) was amongst China's most experienced commercial pilots, with 31,769 flight hours, and was a flight instructor for China Eastern, having trained more than 100 captains. He had been awarded the honorary title of "Meritorious Pilot" of civil aviation in 2011.
27-year-old Second officer (as observer) Ni Gongtao (Chinese, Traditional: 倪公濤, Chinese, Simplified: 倪公涛), with a total of 556 flight hours, was aboard to fulfill training duties.[33][34][35]
Local authorities dispatched 450 firefighters to the scene of the accident.[36] Firefighters were dispatched by the Wuzhou Fire and Rescue Department at 15:05. At 15:56, firefighters from nearby Tangbu arrived, and at 16:40, firefighters from outside Wuzhou were dispatched from Guilin, Beihai, Hezhou, Laibin and Hechi.[37]
Rescue crews initially had difficulty accessing the site because of the forest fire which was extinguished by 17:25.[38] By evening, 117 out of 650 dispatched rescuers were nearby and headed to the site from three directions.[39] Aircraft wreckage and victims' belongings were found, but no signs of human remains were detected.[40][41] Workers used hand equipment, detection dogs and UAVs to search for the flight recorders and human remains, finding one flight recorder on 23 March.[33][42] The crash site was concentrated within a 30-metre (100 ft) radius where most of the wreck was found.[43] Major components such as the horizontal stabilizers, vertical tails, rudders, left and right engines, left and right wings, fuselage parts, landing gear and cockpit were recovered from the area.[1] Rescue workers found a 1.3-metre-long (4 ft 3 in) fragment of a wing trailing edge about 12 kilometres (7 mi) from the main site.[1][44]
Wet weather and the challenging accessibility of the crash site hampered the recovery process. Heavy rain partially filled the impact crater with water which had to be pumped away.[45] Recovery activities were suspended on the morning of 23 March because of the threat of landslides.[42] The remains of all 132 aircraft occupants were positively identified by 29 March.[46][47] As of 31 March 2022, at least 49,117 pieces of airplane wreckage had been recovered.[48]
The CAAC enabled an emergency task force and dispatched a team to the crash site.[29]Liu Ning, secretary of the Chinese Communist Party in Guangxi, visited the crash site and ordered an "all-out" search and rescue operation. He was accompanied by the director of Standing Committee of the People's Congress of Guangxi and other officials.[49]
American agencies responded as representatives of the country where the aircraft was manufactured. The Federal Aviation Administration (FAA) said it was ready to assist in investigation efforts if requested.[50]Boeing said that it was informed by initial reports and was gathering details.[50] The National Transportation Safety Board (NTSB) said a senior official had been appointed as its representative to the inquiry.[51] Representatives from CFM International, Boeing, and the FAA were assigned as technical advisers in the probe.[51] United States Transportation secretary Pete Buttigieg said on 23 March 2022 that Chinese authorities had invited the NTSB to take part in the investigation.[52] COVID-19 quarantine regulations may have hampered access of U.S. investigators to mainland China.[52][33] On 29 March 2022, the NTSB announced that China had granted visas to the agency and the technical advisors from Boeing, engine manufacturer CFM and the FAA.[53]
The cockpit voice recorder (CVR) was found on 23 March 2022, severely damaged externally, but the internal storage unit appeared to be relatively intact.[33][34] It was sent to Beijing for data extraction.[54][55] The emergency locator transmitter (ELT) was retrieved on 26 March,[56] and on 27 March, the flight data recorder (FDR) was recovered. It had been buried 1.5 metres (5 ft) deep in the soil and appeared slightly dented but was intact.[57] The two flight recorders were sent to a facility in Washington, D.C. for analysis.[58] Concurrently, on 1 April 2022, a team of NTSB investigators left the United States for China.[59]
Mao Yanfeng, head of aircraft investigation at the CAAC, stated the flight had not encountered dangerous weather conditions.[60] No components of common explosives were detected.[46] Chinese leadership called for open, timely and transparent publication of information about the crash. The CAAC published a preliminary report on 20 April 2022, 30 days after the accident.[61][62] Soon after the accident, it was suggested that catastrophic failure of the tailplane (for example, a stabilizer problem) and sabotage (such as a pilot intentionally crashing) were two of the possibilities regarding the cause of the crash.[60] On 24 March 2022, a piece of the jet was discovered about 10 km (6 mi) from the crash site, initially giving weight to the theory of a mid-air breakup.[63] However, Chinese authorities later confirmed that it was a winglet, whose loss should not severely impair airworthiness, and which is lightweight enough to either have flown to the ground in the wind or broke-up during the descent.[64]
On 20 April 2022, CAAC released a preliminary report regarding the accident, stating that "there was no abnormality in the radio communication and control command between the crew and the air traffic control department before deviating from the cruise altitude." It was reported that the plane was airworthy, up to date on inspections, that all personnel met requirements, that weather was fine, and that no dangerous goods were found. Both aircraft recorders were severely damaged and were sent to Washington for further investigation.[62]
On the eve of the first anniversary in March 2023, the CAAC released an unusually short[65] interim statement that the investigation is ongoing due to the "very complicated and very rare" nature of the accident.[66] As of March 2024[update], no final report has been released. The CAAC released a statement in March 2024 reiterating preliminary findings from the previous year that there were no issues with the aircraft and crew.[67]
Early reports of the aircraft's flight data recorder pointed towards a deliberate crash from the cockpit. Flight controls were pushed to put the plane into a dive. This led the investigation toward the pilot or the possibility of a cockpit breach. China Eastern noted the unlikeliness of anyone breaching the cockpit, as an emergency code was not broadcast. Chinese authorities are not pointing to issues regarding mechanical or flight control problems.[4][5][6]
On 17 May 2022, The Wall Street Journal reported a source from the US government, from officials involved in the investigation, as saying that the plane had been intentionally crashed, based on an analysis of data from the aircraft recorders.[68][6] News reports published by ABC News on the same day concurred with the Wall Street Journal's report of the investigating officials in the US government declaring that the aircraft had been deliberately put into a vertical dive by a person on the flight deck, also citing flight recorder data showing that the landing gear and flaps had evidently not been engaged or deployed during the aircraft's descent which would indicate the pilots attempting an emergency descent or landing.[69]
Multiple reports also mentioned that in the moments just before and during the descent, there were no distress or mayday calls from the cockpit to air traffic control nor any answers to the attempts from air traffic control and nearby aircraft to make contact with the aircraft. A video was released to the public on the day of the accident, showing the aircraft entering a steep dive before slamming into a hilly area.[70][71]
On 20 March 2024, the Civil Aviation Administration of China published an interim update, according to which "no anomalies" had been found, all activities and procedures adhered to the prescribed protocols, ground crew including the air traffic control personnel were found competent, and navigation equipment were working as expected.[72] Officials further stated they would update the report as more information becomes available. The report was published one day before the two-year anniversary of the crash.[73]
Chinese premier Li Keqiang called for comprehensive efforts to search for survivors and treat the injured, emphasizing the need to reassure and serve the families of the victims. Chinese leader Xi Jinping called for investigators to determine the cause as soon as possible and to ensure "absolute" aviation safety.[74] Over 1,000 psychology staff were dispatched to provide aid and emotional support to the families of the victims.[47]
China Eastern established a hotline for family members[75] and announced that its Boeing 737-800 fleet would be grounded for inspection until the investigation was completed.[30] Most of the airline's 737-800s eventually returned to service in April 2022.[76]
VariFlight reported that nearly 74 percent of the 11,800 flights scheduled in China on 22 March were cancelled as a result of the crash. A majority of flight services between Beijing and Shanghai were cancelled. Cancellation rates in China were the highest of 2022.[77] Nearly 89 percent of all China Eastern flights were cancelled on 22 March.[78]
News concerning the crash was heavily censored in China. State-run media focused on the emergency crews' response, including detailed lists of their equipment and provisions, and orders from Xi Jinping that officials do everything possible to find survivors. After officials initially failed to answer basic questions about the plane and its pilots, they were accused by online commentators of "rainbow farts," an idiom for excessive praise. Articles and social media posts that asked more detailed questions were deleted by censors. Faced with mounting pressure, officials eventually provided information on the maintenance history of the plane, the pilots' flight experience, and weather conditions at the time of the crash.[79]
Within two hours of the crash, twenty people claimed to have "survived" by not boarding the flight. Local media found only two of these claims to be genuine.[80]
A number of world leaders expressed condolences for the loss of life incurred.[81]
In India, the Directorate General of Civil Aviation (DGCA) placed all Boeing 737 aircraft flown by Indian carriers under "enhanced surveillance." SpiceJet, Vistara and Air India Express have the aircraft in their fleets. An official from the regulatory body said that "safety is serious business" and that the situation was being closely monitored.[82]
On U.S. stock markets, Boeing shares initially fell by 7.8 percent and China Eastern shares by 8.2 percent after the incident.[83][30] On the Hong Kong Stock Exchange, China Eastern shares dropped by 6.5 percent.[83]
Boeing offered its condolences to the families of the victims and said that it was in contact with China Eastern and the NTSB.[84]
^The aircraft's base model is the Boeing 737–800. "9P" is the Boeing customer code for China Eastern, used to identify detailed variations or options requested by particular customers.
^Yun, Wang, ed. (22 March 2022). "MU5735今早临时取消保山飞昆明航段" [MU5735 temporarily canceled the Baoshan to Kunming segment this morning]. Spring City Evening News (in Chinese). Archived from the original on 22 March 2022. Retrieved 22 March 2022.
^"广西消防:发现客机残骸碎片,尚未发现遇难者遗体" [Guangxi Fire Department: Fragments of passenger plane wreckage were found, but the remains of the victims have not yet been found]. j.eastday.com (in Chinese). Archived from the original on 21 March 2022. Retrieved 21 March 2022.
^"MU5735空难7小时后 尚未找到遇难者遗体" [7 hours after the MU5735 air crash, the remains of the victims have not been found]. Southern Weekly (in Chinese). Phoenix New Media. 22 March 2022. Archived from the original on 21 March 2022. Retrieved 22 March 2022.
^Pengwei, Guan (21 March 2022). "网传昆明飞广州航班MU5735出现骤降?航旅纵横显示航班已到达,飞常准、携程显示该航班失联,橙柿正在进一步了解" [According to the Internet, flight MU5735 from Kunming to Guangzhou experienced a sudden drop? Hanglv Zongheng shows that the flight has arrived, Feichang Zhun and Ctrip show that the flight has lost contact, and Orange Persimmon is looking into it further] (in Chinese). Hangzhou Net. Archived from the original on 21 March 2022. Retrieved 27 March 2022.
^Mingliang, He (21 March 2022). "MU5735搭载133人广西藤县发生事故,昆明长水机场不知情:2点57分已到达" [MU5735 carrying 133 people had an accident in Teng County, Guangxi, and Kunming Changshui Airport did not know: it arrived at 2:57]. Times Finance (in Chinese). Archived from the original on 21 March 2022. Retrieved 21 March 2022.
^Xinran, Ye (21 March 2022). "未抵达的MU5735 东航空难时间线" [Unarrived MU5735 China Eastern Airlines crash timeline]. The Economic Observer (in Chinese). Archived from the original on 31 March 2022. Retrieved 3 April 2022. 目前航旅纵横APP上显示的该航班状态显示为:失事。 [At present, the status of the flight displayed on the Hanglv Zongheng APP is displayed as: Crash.]
^ ab"东航一架波音737飞机坠毁民航局已启动应急机制" [A Boeing 737 of China Eastern Airlines crashed, the Civil Aviation Administration has activated the emergency mechanism] (in Chinese). Civil Aviation Administration of China. Archived from the original on 21 March 2022. Retrieved 21 March 2022. 机上人员共132人,其中旅客123人、机组9人 [There were 132 people on board, including 123 passengers and 9 crew members.]
^Chen, Zhenglu (22 March 2022). "央視:東航失事航班沒有外籍乘客" [CCTV: There are no foreign passengers on the crashed China Eastern flight]. United Daily News (in Chinese). Archived from the original on 21 March 2022. Retrieved 22 March 2022. Regarding whether there were any Taiwanese on board, the Taiwan branch of China Eastern Airlines told this newspaper earlier, "It is not convenient for me to answer your question, but I have already forwarded it to the headquarters."
^"滚动丨最新!发现客机残骸碎片,尚未发现遇难者遗体" [Scroll丨Latest! Debris of airliner wreckage found, no remains of victims]. resource.cloudgx.cn (in Chinese). Archived from the original on 21 March 2022. Retrieved 21 March 2022.
^"东航客机坠毁引发的森林火灾已扑灭" [Forest fire caused by China Eastern Airlines plane crash has been extinguished] (in Chinese). Archived from the original on 21 March 2022. Retrieved 21 March 2022.
^"广西自治区党委书记刘宁已赶赴现场,要求全力搜救" [Liu Ning, Secretary of the Party Committee of Guangxi Autonomous Region, has rushed to the scene and asked for all-out search and rescue]. Hangzhou News (in Chinese). 21 March 2022. Archived from the original on 21 March 2022. Retrieved 21 March 2022.
^黑匣子初判为舱音记录器 已被连夜送京译码 [It has been found that the black box is initially determined to be a cockpit voice recorder] (in Chinese). CAAC News. 23 March 2022. Archived from the original on 23 March 2022. Retrieved 23 March 2022 – via Sina News. The black box was sent overnight to a professional civil aviation agency in Beijing for decoding. The download and decoding of the recorder data takes time, and may take longer if the internal storage unit is damaged.
^Shangyou News (21 March 2022). "没登机的"幸运儿"有20多位?东航MU5735坠机后,这些消息都是假的!" [Are there more than 20 "lucky ones" who didn't board the plane? After the crash of China Eastern Airlines MU5735, these news are all fake!]. Sina Finance (in Chinese). Archived from the original on 26 March 2022. Retrieved 26 March 2022.