WARNING: Images below may disturb some readers
No survivors have been found as the search continued of the scattered wreckage of a China Eastern Airlines plane carrying 132 people that crashed a day earlier in a forested mountainous area in China's worst air disaster in a decade.
A state broadcaster reported the dire information on Tuesday morning.
"Wreckage of the plane was found at the scene, but up until now, none of those aboard the plane with whom contact was lost have been found," state broadcaster CCTV said more than 18 hours after the crash.
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Video captured the China Eastern Boeing 737-800 in a near-vertical nose-dive before it crashed near the city of Wuzhou in the Guangxi region.
The crash created a deep pit in the mountainside, Xinhua news agency reported, citing rescuers.
The report said drones and a manual search would be used to try to find the black boxes, which hold the flight data and cockpit voice recorders essential to crash investigations.
The flight was travelling from Kunming in the southwestern province of Yunnan to the industrial centre of Guangzhou along the east coast, the Civil Aviation Administration of China said.
China Eastern flight 5735 had been travelling 842kp/h at around 9144 metres when it entered a steep dive around 2:20 pm local time, according to data from flight-tracking website FlightRadar24.com.
The plane stopped transmitting data 96 seconds later.
Dr Hassan Shahidi, the President and CEO of the Flight Safety Foundation said the flight pattern was "unusual".
"It was cruising at about 29,000ft before it began to descend rapidly. It lost 21,000ft in about 70 seconds," he told Today.
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"It stopped descent at about 7400ft and briefly climbed to about 8600ft before it began to descend again.
"From the time of the descent to the crash, it took under two minutes. This is very unusual and this is known as loss of control in flight."
More than seven hours after communication was lost with the plane, there was still no word of survivors.
Local villagers were first to arrive at the forested area where the plane went down and sparked a blaze big enough to be seen on NASA satellite images.
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Hundreds of rescue workers were swiftly dispatched from Guangxi and neighbouring Guangdong province.
The plane was carrying 123 passengers and nine crew members, the CAAC said, correcting earlier reports that 133 people had been on board.
Chinese President Xi Jinping called for an "all-out effort" by the rescue operation, as well as for an investigation into the crash and to ensure complete civil aviation safety.
State media reported all 737-800s in China Eastern's fleet were ordered grounded. Aviation experts said it is unusual to ground an entire fleet of planes unless there is evidence of a problem with the model.
Boeing 737-800s have been flying since 1998, and Boeing has sold more than 5,100 of them. They have been involved in 22 accidents that totalled the planes and killed 612 people, according to data compiled by the Aviation Safety Network, an arm of the Flight Safety Foundation.
"There are thousands of them around the world. It's certainly had an excellent safety record," the foundation's president, Hassan Shahidi, said of the 737-800.
China's air-safety record has improved since the 1990s as air travel has grown dramatically with the rise of a burgeoning middle class. Before Monday, the last fatal crash of a Chinese airliner occurred in August 2010, when an Embraer ERJ 190-100 operated by Henan Airlines hit the ground short of the runway in the northeastern city of Yichun and caught fire. All 44 people on board were killed. Investigators blamed pilot error.
Aviation experts said they expect that China will ask the US National Transportation Safety Board for help, although a safety board spokesman said on Monday that had not happened yet. The US Federal Aviation Administration, which certified the 737-800 in the 1990s, said it was ready to help in the investigation if asked.
Crash investigations are usually led by officials in the country where the crash occurred, but they typically include the airplane's manufacturer and the investigator or regulator in the manufacturer's home country.
Mr Shahidi said he expects investigators to comb through the maintenance history of the plane and its engines, the training and records of the pilots, air traffic control discussions and other topics.
Chicago-based Boeing Co. said it was aware of reports of the crash and was trying to gather more information. Boeing shares fell more than four per cent in afternoon trading in New York.
Boeing 737-800 'workhorse' of China Eastern Airlines
Headquartered in Shanghai, China Eastern is one of the country's top three airlines, operating scores of domestic and international routes serving 248 destinations.
The aircraft was delivered to the airliner from Boeing in June 2015 and had been flying for more than six years. China Eastern Airlines uses the Boeing 737-800 as a workhorse of its fleet — the airline has more than 600 planes, and 109 are Boeing 737-800s.
Chinese broadcaster CCTV said China Eastern set up nine teams to deal with aircraft disposal, accident investigation, family assistance and other pressing matters.
The CAAC and China Eastern both said they had sent officials to the crash site in accordance with emergency measures.
China Eastern online made its website have a black-and-white homepage after the crash.
The accident quickly became a leading topic on China's Twitter-like Weibo platform, with 1.34 billion views and 690,000 discussions. Many posts expressed condolences to the families of victims, while others questioned the planes' safety.
The twin-engine, single-aisle Boeing 737 in various versions has been flying for more than 50 years and is one of the world's most popular planes for short and medium-haul flights.
The 737 Max, a later version, was grounded worldwide for nearly two years after two crashes in 2018 and 2019 killed 346 people. China's aviation regulator cleared the Max to return to service late last year, making the country the last major market to do so.
The deadliest crash involving a Boeing 737-800 came in January 2020, when Iran's paramilitary Revolutionary Guard accidentally shot down a Ukraine International Airlines flight, killing all 176 people on board.
