AirxLiban From Lebanon, joined Oct 2003, 4520 posts, RR: 53
Reply 4, posted (10 years 10 months 2 weeks 5 days 13 hours ago) and read 6041 times:
Its just you,
Aircraft doors are of the plug type, such that the pressure difference between the cabin and the outside air basically pushes the door against the fuselage. In order to open it, you'd need for it first to be unlocked (controllable from the cockpit) and secondly, the strength of a hell of a lot of people. You'd probably be fighting over 0.5atms of pressure.
CaptainGomes From Canada, joined Feb 2001, 6413 posts, RR: 55
Reply 9, posted (10 years 10 months 2 weeks 5 days 8 hours ago) and read 5656 times:
You bring up a good point AirxLiban, and theoretically it should be possible to open up a door at low altitude. I still stand by my comment that this would not pose a threat to the safety of the passengers, unless the woman started throwing the passengers out the door.
The reason this would theoretically not be a threat is because all it would do is create a lot of wind and noise inside the cabin, but because there would not be a difference in pressure between the aircraft and the outside atmosphere, then nobody would be sucked out. Keep in mind that even in a rapid decompression, the threat of being sucked out only exists in the short time it takes for the pressure to equalize between the cabin and outside.
To illustrate why opening a door at low altitude would not be a threat, and perhaps somebody else can provide more details, there have been cases in the past where the crew have opened doors or windows in-flight, such as in the case of smoke. It was either a 767 or a 777 recently flying across the Atlantic where the pilots opened one or more cockpit windows at low altitude to get rid of the smoke inside. Also, and I'm not sure if this feature has ever been used in any case, in the 747, you can crack open one of the rear doors at low altitude, again for the purpose of allowing smoke to escape from the cabin.
I hope that not only helps, but also leads to further discussion.
"it's kind of like an Airbus, it's an engineering marvel, but there's no sense of passion" -- J. Clarkson re: Coxster
Nz1 From New Zealand, joined May 2004, 2287 posts, RR: 25
Reply 10, posted (10 years 10 months 2 weeks 5 days 8 hours ago) and read 5635 times:
AIRLINERS.NET CREW FORUM MODERATOR
You can indeed crack open the door of a 747 at low altitude to aid the dispersion of smoke. There is even a strap which fits on the door handle and is affixed to the aircraft to allow such an action without the door fully opening.
Also, there is no way in hell the doors are locked/controlled from the flight deck. Utter rubbish.
With say a 2psi differential over the entire door, you would be trying to fight a couple of ton force just to crack it at high altitude.
Squirrel83 From , joined Dec 1969, posts, RR:
Reply 11, posted (10 years 10 months 2 weeks 5 days 8 hours ago) and read 5610 times:
LOL, This lady must have wanted a breath of fresh air, maybe she was sitting next to the lav??? LOL I can only imagin being on that flight; sitting there thinking uhh lady do you know what you are doing? I can only imagin . . SCARY . .
CKT523 From United Kingdom, joined May 2004, 161 posts, RR: 0
Reply 12, posted (10 years 10 months 2 weeks 4 days 23 hours ago) and read 5427 times:
indeed nobody could "open" a door above about 10,000ft but all the same, it doesnt look all that pretty for passengers who dont know this! I remember reading in a 747 manual about cracking doors to disperse smoke. great idea.
UA777222 From United States of America, joined Dec 2003, 3348 posts, RR: 11
Reply 13, posted (10 years 10 months 2 weeks 4 days 21 hours ago) and read 4817 times:
There have been many different posts about this. First off there are the 'cork' doors and there are the other doors. The fact of the matter is that the door opens out and when going 300-600mph this would be almost/if not humanly impossible. And yes the lady does need help in the head.
Starlionblue From Greenland, joined Feb 2004, 17300 posts, RR: 67
Reply 14, posted (10 years 10 months 2 weeks 4 days 21 hours ago) and read 4727 times:
Somewhat related, Mythbusters was on Discovery last night (in the US). They were pressurising an old DC-9 and shooting holes in it. 9mm holes with a remote controlled pistol, even in a window, only resulted in a easily controllable leaks. Even blasting an entire window away with detcord still had their dummy sitting strapped into the seat next to the window, although he may have broken his arm (it was hanging out through the window). Other pax would probably have a brown trouser moment but they would not be sucked out. Finally, they used a shaped charge to blow away several meters of fuselage. That did have the desired effect, but they still concluded that this would probably only be hazardous to those sitting near the hole. Others would not be sucked out, even if unrestrained.
So much for that urban legend.
"There are no stupid questions, but there are a lot of inquisitive idiots."
C130HERCULES From Trinidad and Tobago, joined Jun 2004, 77 posts, RR: 0
Reply 15, posted (10 years 10 months 2 weeks 4 days 19 hours ago) and read 4265 times:
As practically impossible as it is for that woman to open the door, it still is qutie SCARY for other pax to see her do that . ON the topic of 'cabin doors' does anyone recall the incident that made headlines involving the South African Airways flight destined for LHR. I may be wrong but one of the f/a dashed to get the handle in the locked position and was highly praised for her actions.
Ar385 From Mexico, joined Nov 2003, 7097 posts, RR: 34
Reply 18, posted (10 years 10 months 2 weeks 4 days 9 hours ago) and read 3792 times:
Altitude has no bearing on wether the door opens or not. It´s pressurization. The plane can be idle on the ground, but if it´s pressurized you won´t be able to open any door. I do recall, however, that an AA flight attendant was killed when he/she opened a door on the ground while the plane was still pressurized and was sucked out and smashed against the tarmac. Maybe the plane was depressurizing and at that point the pressure was such that a person could open a door but still suffer the consequences.
WhiteHatter From , joined Dec 1969, posts, RR:
Reply 19, posted (10 years 10 months 2 weeks 4 days 9 hours ago) and read 3777 times:
Let me see, Im pretty sure it was a South African Airways flight but you maybe right. I will look into it.
BA flight to Nairobi, although this might well have been another one!
The passenger was carted off to the local funny farm after the passengers and crew tied him up. Someone caught it on camera, plus it happened in the first class cabin. The rock star Bryan Ferry was involved in subduing him which is why it made the papers
Bwaflyer From United Kingdom, joined Jun 2004, 696 posts, RR: 0
Reply 21, posted (10 years 10 months 2 weeks 2 days 16 hours ago) and read 3626 times:
I fly on the 73G, and in common with the rest of the 737NG range, there is a speed lock on the cantilever over wing exits, primarily because no crew are stationed there. I seem to remember studying on a CRM course (and I am quite prepared to be proved wrong!) that a Saudia L1011 had a cabin fire and returned to Saudi, amid much confusion. The (unqualified)flight engineer didn't depressurise the cabin, meaning the cabin crew couldn't open the exits, and there were no survivors. Examining the wreckage, investigators found piles of bodies around each door.
Type-rated From , joined Dec 1969, posts, RR:
Reply 22, posted (10 years 10 months 2 weeks 2 days 13 hours ago) and read 3524 times:
Usually as soon as the a/c pushed back for it's taxi on the way to the runway, we start the cabin pressurization. This is done for the comfort of the pax so cabin gradually increases rather than rather abruptly during a 3,000 fpm climbout.
I thought commercial planes had "dump valves" on their pressure systems so when they land, any excess pressure is relieved automatically. That's why a lot of times you'll find that your ears pop upon touchdown.
CKT523 From United Kingdom, joined May 2004, 161 posts, RR: 0
Reply 24, posted (10 years 10 months 1 week 6 days 12 hours ago) and read 3330 times:
you are quite right BWAflyer. I had the same training as you with AEU and we were given the same example of the SV Tristar at Riyadh, pilot returned to airport with smoke in cabin and refused to evacuate on the runway and taxied to stand.When fire crews tried to open the cabin doors, they couldnt as one engine was still running, therefore the cabin was still presurised and the doors were locked to the cabin wall.Also when they did manage to gain access, the doors would not open due to people being next to them and they couldnt open inwards before they could ride up into the fuselage.Indeed they did find a pile of bodies round the doors and also in the flight deck where they had breeched the door,trying to escape the smoke and fire.Very nasty, and lessons hopefully were learned. off topic but i did enjoy first aid training with AEU, with good old Jasmine and a her "5 breaths to achive 2".hehe, it worked though cause i havent forgotten any of it!Bless her.
: The BA flight with the rocker on board was NOT the door opening scare. In the BA incident, a thug burst into the flight deck and forced the control co
: I wonder whether the question about the door locks being controlled from the cockpit relates more to the fact that many commercial aircraft have cont