html On the 7th, a netizen posted a video on the Internet saying that he discovered that the screws on the aircraft wing were loose on the Air China flight CA1921 from Beijing to Hengyang, which caused concern.
I believe that there are many people in society who fly, but not many people know how to fly. I watched the video twice, but I still couldn't figure out whether the exposed screws on the outside of the plane were holding the wings. But it does look like it's protruding a little, like it's loose. Moreover, it seems that a screw has fallen out.
This immediately reminded me of the Challenger space shuttle that fell off shortly after takeoff. The direct cause of the accident was the failure of a sealing ring .
The space shuttle Challenger was launched into the sky over Florida at 11:39 am Eastern Time on January 28, 1986. After the space shuttle took off, the O-ring seal of the solid rocket booster (SRB) on its right side failed. The adjacent external fuel tank suffered structural failure under the high temperature of the leaking flames, causing the high-speed space shuttle to disintegrate under the action of air resistance 73 seconds after launch, killing all seven astronauts on board. The wreckage of the Challenger was scattered in the sea and was later salvaged by a remote search and rescue team.
There is another case. On February 24, 1999, M-type Boeing aircraft B-2622 flew flight SZ4509 from Chengdu to Wenzhou . There were 50 passengers at the time. The plane crashed while landing only 27 kilometers away from Wenzhou Airport. All 61 people on board were killed. The direct cause of the accident was that the mechanic installed an incorrect nut.
There are at least tens of thousands of screws or rivets on an airplane, and they all play different roles. Once a screw in a critical location fails, it will have an unimaginable impact on the aircraft.
That night, @ Air China responded: Today, in response to reports on the Internet that there are loose screws in the ship-shaped fairing on the inner left wing of Air China flight CA1921, Air China attaches great importance to it and immediately inspects the relevant parts of the aircraft. The loose screws were repaired and the relevant fleet was investigated. Air China will adhere to "safety first" to ensure aviation safety. Thank you to all passengers for your interest in Air China.
However, Air China did not disclose the impact of loose screws on aircraft flight safety.
Some people in the industry said that the loosening of the fairing screws will not affect the main body of the aircraft. At most, it will only increase fuel consumption. Even if all the screws fall off, it will not affect the safety of the aircraft. Whether there is any basis for this statement still needs official clarification.
Fortunately, flight CA1921 from Beijing to Hengyang arrived safely at 3:30 pm on July 7, giving everyone a false alarm.
