Sunday, February 26, 2012

Why does a plane crash if it loses pressurization?

I saw in a movie/tv show where someone had a gun in a plane an someone said if you shoot it and it pierces the cabin, it will lose pressurization and then crash. Sometimes I see the plan go into a steep dive or something. What is the reason that a plane would crash if there is a sudden loss of pressure?Why does a plane crash if it loses pressurization?If it is explosive/catastrophic decompression, bulkheads in the aircraft can be deformed causing to controls to be jammed and rendered inoperative. If the rear pressure bulkhead fails it can actually blow parts of the tail off the aircraft. This happened to a JAL 747.Why does a plane crash if it loses pressurization?
Pray for forgiveness, because death is near. In high altitudes, you will pass out in 15 seconds or less because of oxygen deprivation, lack of awareness, lightheadedness, euphoria, and then you black out...

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Why does a plane crash if it loses pressurization?depressurization doesnt usually cause crashes.



if the aircraft suffers sudden depressurization, the pilots will initiate an emergency decent to 10,000ft. this decent is very steep and can be very violent - but it is necessary for the survival of the passengers and crew.



depressurization at altitudes above 10,000ft means that the atmosphere is thinner and oxygen content of the air is very low, too low to sustain life. this is why (and the only reason) oxygen masks deploy. Also to note, when sudden loss of cabin pressure occurs, a fog-like mist will form, making it hard to see.



sudden depressurization can be violent in itself, but definitely doesnt cause an aircraft to crash. other factors are usually involved, like the largest loss of passengers lives in aviation history: the JAL123 crash. the aircraft, a 747, suffered sudden depressurisation due to a weak rear cabin bulkhead which resulted in the entire vertical stabiliser seperating from the aircraft tail and disabling the flight controls to the elevators.



all pressurised aircraft have small pressure leaks (probably in total the size of a bullet hole), but they are compensated via the environmental control system bleeding more air from the engine into the air conditioning.Why does a plane crash if it loses pressurization?
Losing pressure in an airplane does not cause it to crash. Bullet holes will cause a small leak but usually if an airplane loses pressure it is due to a malfunctioning pressurization valve or a leaking door seal. All that happens is the pilot will get a warning light and will begin to descend to a lower altitude. In the meantime the oxygen masks will deploy so the passengers can breath until the airplane reaches 10,000 ft.



Steep dives, people getting sucked out the windows, magazines flying all over the cabin are all Hollywood nonsense. If you're interested in an actual number the difference between the pressure in an airplane at 35,000 feet and outside is about 7psi. If your car had 7 psi in a tire you'd think it was flat. 7 psi is not going to make the airplane explode.Why does a plane crash if it loses pressurization?A loss of pressurization will NOT cause a crash.



If a pressurized airplane is depressurized, oxygen masks will automatically deploy in the cabin so that passengers can breathe easily despite the high altitude of the airplane. At the same time, pilots will quickly descend the airplane to a lower altitude at which oxygen masks won't be necessary. The pilots will then plan a landing at the first opportunity. However, there will be no crash.



Depressurization doesn't hurt the airplane, it just makes it necessary for everyone inside to breathe oxygen from a mask, unless the airplane is already quite low in altitude, in which case people can breathe easily even if the cabin is depressurized.



In a famous accident, a 737 depressurized violently when the entire roof of the cabin tore away in mid-flight. The airplane was not otherwise harmed, and the pilots brought it in for a landing with no trouble. Everyone survived, except for a flight attendant who was standing in the aisle when the roof tore away鈥攕he was sucked out of the airplane and was never found. For the full story, see:



http://en.wikipedia.org/wiki/Aloha_Airli鈥?/a>



In the early days of jets, one British jet airliner had a problem that caused it to explode in mid-flight, killing everyone on board, and several aircraft were lost that way. But that was half a century ago, and it doesn't happen now.



Finally, if you shoot a hole in the wall of an airplane, it will only depressurize slowly, if at all, and there will be no crash. A large explosion might blow away enough of cabin to produce explosive decompression, but even that would not necessarily cause a crash. The airplane doesn't have to be pressurized in order to fly.
Nope... airplanes have about thirty gun sized holes, not visible on it. That is so that they can have air constantly moving in and out. The pilot can agjust the oppening of those. "Those are what cause aircraft to sink in water". Now a gun shot would cause a rush of air... but not significant. Your ears would be a little eirritated, but not really. You would dive because the pilot wants to get you from 30,000ft to a breathable 8,000 feet. They crash sometimes because debris hits engines and the fire occurs.Why does a plane crash if it loses pressurization?
The decompression (fast and powerful) will tear the plane apart destroying vital instruments causing the plan to crash.



Put a bullet hole in the cabin won't do a thing, the plane will still fly normally, its only if there is a hole which ripes through the whole plane the aircraft crashes.
Steep dives are not nonsense.

In the event of depressurisation for any reason the pilot had to get down to below 10000 feet so there is enough oxygen in the air to breath. the supply for the overhead drop down masks does not last very long.Why does a plane crash if it loses pressurization?
The rapid depressurization will cause the structure to fail and the passengers will experience hypoxia which is basically lack of oxygen. The fuselage is not Designed to handle extreme pressure differential. A difference of 10 psi is even dangerous
Don't believe everything you see in the movies or on TV. In real life, if the plane lost pressurization, the pilots would land at the nearest suitable airport.
FUN FACT: All Boeing aircraft are designed to have a minimum of 8 windows blown out before losing any amount of pressure. Now you know!
coz it can't fly

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