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A lot of crash in recent years

29 october 2018: Crash of a B737 Max 8 at Jakarta

10 march 2019: Crash of a B737 Max 8 in Etchopia

8 January 2020: A Boeing 737-800 crashes shortly after taking off from Tehran after accidentally being fired by a surface-to-air missile.

Crash of a b737-800 in China

A 737 crashed in China. What we know about the plane

New York (CNN Business)A Boeing 737 carrying 132 people crashed early Monday in China. Although Boeing's 737 has faced extraordinarily high-profile safety concerns over the past three years, the plane that crashed Monday was a different version of the aircraft than the embattled 737 Max that shook Boeing to its core.
The cause of Monday's crash has yet to be determined. The plane had been in service since 2015. The flight, operated by China Eastern Airlines, was flying from the southwestern Chinese city of Kunming to Guangzhou when it crashed.
Here's what we know about the aircraft.
The 737-800
The crashed China Eastern Airlines plane was a Boeing 737-800. It's the most common version of Boeing's jets now in service, and it is the workhorse of many airlines' fleets.

There are 4,502 of the 737-800s now in service worldwide, according to aviation analytics firm Cirium, making it by far the most common Boeing aircraft in use today. It is the most common plane model in the United States, where there are 795 in service, as well as in China, which has 1,177 in service. And it's the second-most-common plane in use worldwide, behind only the A320 made by Boeing (BA) rival Airbus (EADSF).

Boeing started deliveries of the 737-800 in 1998 but has not delivered a civilian version of the plane since two went to China Eastern in January 2020.
The Boeing 737-800 is part of a class of Boeing jets known as 737-NG. The "Next Generation" planes have had safety issues cited by US regulators, although none of those rose to the level of requiring the planes to be grounded.
In 2018 a single passenger was killed on a Boeing 737-700, the other plane in the Next Generation family. In that accident, an engine fan blade on a Southwest Airlines flight broke and caused part of the engine covering to hit the side of the plane. It smashed one of the windows, and the cabin rapidly depressurized. The crew was able to land the plane safely, but a woman sitting next to that window was killed.
In 2019 the National Transportation Safety Board recommended that Boeing redesign part of the jet's engine covers to prevent them from flying into the plane in the event of a similar malfunction. Boeing agreed to make the change.
In some older planes, a part used to keep the wings in place was found to have cracks. Those cracks temporarily grounded a handful of the 737 NGs.
Other fatal accidents involving the 737-800 have occurred when planes were landing in bad weather and missed or skidded off runways. Another one was shot out of the sky by a missile in Iran in 2020.
There has not been a fatal accident with a Chinese airline since 2010, according to the Aviation Safety Network. Boeing issued a statement Monday saying it is working with both US and Chinese safety authorities.
"Our thoughts are with the passengers and crew of China Eastern Airlines Flight 5735," the plane maker said. "We are working with our airline customer and are ready to support them. Boeing is in contact with the US National Transportation Safety Board and our technical experts are prepared to assist with the investigation led by the Civil Aviation Administration of China."
The 737 Max
Boeing's 737 Max suffered two fatal crashes, in 2018 and 2019, that were shown to be caused by a design flaw and led to a global grounding of the aircraft.
Those crashes resulted in the 20-month grounding of the 737 Max, costing Boeing tens of billions of dollars.

CNN,22/03/22

US Investigators Head to China to Assist in 737 Crash Probe

The U.S. National Transportation Safety Board is helping Chinese officials download a cockpit voice recorder that was damaged in the mysterious crash of a Boeing Co. 737 jetliner on March 21.
The work to decipher the final sounds caught by cockpit microphones on the doomed airplane is being carried out in the NTSB’s lab in Washington, D.C., spokesman Peter Knudson said via email. He declined to discuss how or when the so-called black box was transported to the U.S. lab, which is routinely used by investigators around the world after accidents.
The work is being assisted by technicians from Honeywell International Inc., which made the cockpit recorder, said a person familiar with the effort who asked not to be named discussing the sensitive investigation. The device was damaged in the high-impact crash, Chinese investigators have said.
Separately Friday, teams of NTSB investigators and Boeing technical experts from the U.S. departed for China, underscoring the cooperation between the two nations as they probe the accident, which killed all 132 people aboard.
The investigators will follow similar safety protocols to those used by participants in the Beijing Olympics earlier this year, limiting interactions with those not involved in the probe, NTSB said in a tweet. The measures will allow them to begin working immediately without quarantining. The NTSB didn’t specify the number of people on the team bound for China.
The NTSB, along with technical experts from Boeing and the U.S. Federal Aviation Administration, is assisting the Civil Aviation Administration of China under a United Nations treaty that allows participation from the country where an aircraft was built. The FAA team isn’t traveling at this time, the NTSB said.
China notified the NTSB about the accident involving a China Eastern Airlines Corp. 737-800 the day it occurred, triggering U.S. participation. But restrictions due to COVID-19 delayed travel arrangements, according to earlier NTSB tweets.
The CAAC is leading the investigation. Traditionally in such cases, the NTSB can help search the wreckage for clues about what happened to the plane and assist in obtaining data from the jet’s two black boxes. Both recording devices have been recovered.
China Eastern Flight 5735 from Kunming to Guangzhou was flying at about 29,000 feet when it suddenly dove at high speeds. It slammed into a forested hillside about 100 miles from its destination, according to the CAAC.