It is noisy due to an incident in which a passenger opened an emergency exit during a flight from Jeju to Daegu, but I have also learned something new about this, so I shared it
Why did the door open easily
It’s because the emergency exit of the A321 model is designed to open easily in the first place, so that anyone of all ages can open it
It’s an automatic door with a gas lift, so just raise the lever and open it automatically without having to push the door. Boeing doesn’t open this easily
httpswwwyoutubecomembeduDqPpXZI5q4start=5playsinline=1
During the flight, there will be some resistance to opening the door because of the wind, but the automatic door beat the force of the wind
At cruise altitude, the door would not open due to the difference in air pressure, but the Asiana accident occurred at an altitude of 200m just before landing, so there was little difference in air pressure
But why did the door open during the flight
That’s.
This is because the emergency exit of the A321 model does not have a flight lock function to lock the emergency exit during flight
In the case of Boeing models, unlike Airbus, it has a flight lock function, and the fact that there is no flight lock in the Airbus emergency exit is what I first learned
The emergency exit of the B Boeing 737 model, which is a little smaller than the A321, has this flight lock
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While the emergency exit is powered on, the emergency exit cannot be opened, but after the landing touchdown, the lock is released, and the emergency exit can be opened even if the power is disconnected due to an emergency such as a real collision
Accidents like this Asiana flight are unlikely on Boeing models
Of course, Airbus emergency exits without locks are less likely to fail. There are only Boeing flight-locked emergency exits, but if the power is not cut off due to a malfunction in an emergency, the emergency exit cannot be opened, so there are pros and cons
Why the flight attendant couldn’t stop it
This is because there are no crew seats at the third exit on the left of the L3 of the A321 model
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(1)a flight attendant’s seat
(2)the newly opened door
(3)It has a long interior like an A321
스크린샷 출처 : https://youtu.be/KoSmJnDVvLk
The third emergency exit of the plane is that the crew seats are only on the right and not on the left
The accident was caused by a passenger sitting at the left exit
It’s an automatic door that opens just by pulling the lever, but the door is already open when the flight attendant on the right hurriedly takes off the seat belt and runs to the left be unstoppable in the first place
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If you try to close this open door again during the flight, a person can crash, so it’s better to leave it until you land
Asiana only has this arrangement, or never, almost all emergency exits of the A321 around the world are like this. And under aviation law, only one crew per 50 passengers needs to be deployed, so this aircraft with less than 200 passengers has a total of four emergency exits It’s not just Korean law, but it’s a common law around the world
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When the exit door opened, the escape slide was opened, and the wind ripped it off. The yellow one under the exit is the slide
I’m glad this is the back of the engine, the L3 door. If this had happened to the L2 or R2 in front of the engine, the slide would have been sucked into the engine and caused a bigger accident
Summary
The emergency exit of the 1A321 model is an automatic door and there is no flight lock to lock the emergency exit during flight, so at low altitude, anyone of all ages can open it very easily during flight by simply pulling the lever
The 2A321 model has a total of 8 emergency exits, but if it is deployed with less than 200 passengers, only 4 crew members ride, so at least 4 emergency exits do not have crew members It’s common all over the world
This can happen again at any time unless flight locks are mandatory for all emergency exits or one crew member is required for each emergency exit Is it necessary to change the design of the aircraft itself? It is not easy