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Emirates Plane Loses Cabin Pressure Mid-flight  
User currently offlinedghiggins From Israel, joined Dec 2003, 23 posts, RR: 0
Posted (2 years 11 months 1 week 2 days 4 hours ago) and read 23306 times:

What might have caused this .....?


http://nz.totaltravel.yahoo.com/a/-/...e-loses-cabin-pressure-mid-flight/

An Emirates plane carrying 184 people lost cabin pressure yesterday and had to turn back to Dubai.

The incident occurred on Monday afternoon during the flight from Dubai to Kolkata, India.

An Emirates spokesperson told the Associated Press the airline is investigating the incident and "taking all steps to minimise any inconvenience to its passengers".

No one was hurt and passengers were put on a replacement flight on a different aircraft later in the day.

24 replies: All unread, jump to last
 
User currently offlineKDTWflyer From United States of America, joined Jun 2004, 829 posts, RR: 1
Reply 1, posted (2 years 11 months 1 week 2 days 4 hours ago) and read 23147 times:

A multitude of causes can lead to an in-flight depressurization from the very remote (in-flight meteor strikes) to the more common (metal-fatigue failures etc. ) so who knows at this point.


NW B744 B742 B753 B752 A333 A332 A320 A319 DC10 DC9 ARJ CRJ S340
User currently offlineAuchmithie From UK - England, joined Sep 2010, 142 posts, RR: 0
Reply 2, posted (2 years 11 months 1 week 2 days 4 hours ago) and read 23088 times:

Aircraft was A330-200 A6-EKQ operating EK572 DXB-CCU.

User currently offlineHiJazzey From Saudi Arabia, joined Sep 2005, 869 posts, RR: 1
Reply 3, posted (2 years 11 months 1 week 2 days 4 hours ago) and read 23064 times:

Quoting KDTWflyer (Reply 1):
in-flight meteor strikes

I'm intrigued by this. When did it happen? Any links?


User currently offlineABpositive From Australia, joined Nov 2005, 226 posts, RR: 0
Reply 4, posted (2 years 11 months 1 week 2 days 3 hours ago) and read 22821 times:

Or even more common worn out seals on doors.

[Edited 2011-10-17 23:43:36]

User currently offlineTravellerPlus From New Zealand, joined Nov 2008, 347 posts, RR: 0
Reply 5, posted (2 years 11 months 1 week 2 days 3 hours ago) and read 22639 times:

LAN flight coming into Auckland had a close encounter with a meteor. Needless to say, a meteor would cause more than a loss of cabin pressure...

http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10431624



What goes around comes around....unless your luggage is not on the carousel...
User currently offlineTomescu From United States of America, joined Jul 2011, 2 posts, RR: 0
Reply 6, posted (2 years 11 months 1 week 1 day 23 hours ago) and read 21812 times:

Quoting HiJazzey (Reply 3):

I highly doubt it that anything falling from the orbit, like satellite debris, would ever hit an aircraft in mid-air.


User currently offlineSAAFNAV From South Africa, joined Mar 2010, 276 posts, RR: 1
Reply 7, posted (2 years 11 months 1 week 1 day 22 hours ago) and read 20638 times:

Quoting KDTWflyer (Reply 1):


A multitude of causes can lead to an in-flight depressurization from the very remote (in-flight meteor strikes) to the more common (metal-fatigue failures etc. ) so who knows at this point.

We had the flight deck Air-Con turbine pack up the other day... Not good hearing something that spins at 80 000rpm start making metallic noises.

Erich



On-board Direction Consultant
User currently offlineASA From Bangladesh, joined Dec 2010, 732 posts, RR: 1
Reply 8, posted (2 years 11 months 1 week 1 day 20 hours ago) and read 18182 times:

Quoting Tomescu (Reply 6):
I highly doubt it that anything falling from the orbit, like satellite debris, would ever hit an aircraft in mid-air.

But theoretically, it's possible right? Or if you put it the other way, you CAN'T say that it's IMPOSSIBLE (theoretically) 

Now, that would be a cool bonehead Hollywood movie!   


User currently offlineStabilator From United States of America, joined Nov 2010, 712 posts, RR: 0
Reply 9, posted (2 years 11 months 1 week 1 day 19 hours ago) and read 17065 times:

Quoting Tomescu (Reply 6):

When that piece of space junk was forecast to fall out of the sky, there was a special NOTAM warning of falling space debris. Heard it every time I called for my weather briefing until it came down."Pilots are urged to report any falling space debris and remain well clear" or something like that haha.



So we beat on against the current, borne back ceaselessly into the past.
User currently offlinesw733 From United States of America, joined Feb 2004, 6324 posts, RR: 9
Reply 10, posted (2 years 11 months 1 week 1 day 19 hours ago) and read 16961 times:

Quoting Stabilator (Reply 9):
When that piece of space junk was forecast to fall out of the sky, there was a special NOTAM warning of falling space debris. Heard it every time I called for my weather briefing until it came down."Pilots are urged to report any falling space debris and remain well clear" or something like that haha.

Big difference, though. Natural space materials fall on to the earth many times each day.


User currently offlineredflyer From United States of America, joined Feb 2005, 4329 posts, RR: 28
Reply 11, posted (2 years 11 months 1 week 1 day 19 hours ago) and read 16896 times:

Quoting ABpositive (Reply 4):
Or even more common worn out seals on doors.

Or even more common: a rupture or leak in the plumbing associated with the pressurization system.



My other home is a Piper Cherokee 180C
User currently offlinevgnatl747 From United States of America, joined Apr 2001, 1513 posts, RR: 2
Reply 12, posted (2 years 11 months 1 week 1 day 19 hours ago) and read 16546 times:

Quoting Stabilator (Reply 9):
"Pilots are urged to report any falling space debris and remain well clear" or something like that haha.

Like that's something to easily avoid when you're traveling along at 500mph and something is falling from space at terminal velocity.



Work Hard. Fly Right. Continental Airlines
User currently offlineYYZYYT From Canada, joined Apr 2005, 955 posts, RR: 0
Reply 13, posted (2 years 11 months 1 week 1 day 19 hours ago) and read 16255 times:

Quoting Tomescu (Reply 6):

I highly doubt it that anything falling from the orbit, like satellite debris, would ever hit an aircraft in mid-air.

Hey, didn't you hear - there's a 5% chance of that happenning... at least according to this article.

I especially love the part about "reports" that a meteor actually brought down AF447!   

http://blogs.discovermagazine.com/co...-meteor-bring-down-air-france-447/


User currently offlineRoseFlyer From United States of America, joined Feb 2004, 9643 posts, RR: 52
Reply 14, posted (2 years 11 months 1 week 1 day 18 hours ago) and read 15897 times:

I can't open the article, but the majority of cases involving the airplane not being able to maintain pressurization are caused by failed PACs (DXB-CCU is not ETOPS, so they can dispatch with an INOP PAC), failed seals, or a form of cabin breach (most common is damage due to ground loading causing a small rupture or dent and as the airplane pressurizes it opens further and not a meteor!).

Not sure what happened, but I'd be curious if it was a rapid decompression or a slow decompression. Most airplanes will maintain adequate cabin pressure for 4-5 minutes after a failure of the pressurization system, so that masks are not needed.



If you have never designed an airplane part before, let the real designers do the work!
User currently offlineSEA From United States of America, joined Jul 2011, 236 posts, RR: 0
Reply 15, posted (2 years 11 months 1 week 1 day 18 hours ago) and read 15751 times:

AV Herald article doesn't shed much light on what happened, but at only 100 miles out, I wonder if it's a mechanical issue: http://avherald.com/h?article=444b03fb&opt=0

User currently offlineYULWinterSkies From United States of America, joined Jun 2005, 2179 posts, RR: 5
Reply 16, posted (2 years 11 months 1 week 1 day 17 hours ago) and read 14498 times:

Quoting Tomescu (Reply 6):
I highly doubt it that anything falling from the orbit, like satellite debris, would ever hit an aircraft in mid-air.

It is extremely unlikely, but if they cross paths, impact will happen, like for any two objects in movement.

Quoting TravellerPlus (Reply 5):
Needless to say, a meteor would cause more than a loss of cabin pressure...

It could be a big one able to basically perforate either a wing or the fuselage, but most meteors are going to be smaller pieces, either because the initial meteor impacting the Earth has already fragmented in multiple pieces in the upper atmosphere or has largely disintegrated by the time it reaches jet flight altitude. (most will have in fact completely disintegrated by then)
Most of these objects falling on Earth are very small and are generally unnoticed, and these probably would not fatally damage a flying airplane, perhaps gradual loss of pressure could happen it the fuselage is impacted but not perforated in full, but I'm not expert.
Antarctica is the place of choice to study meteorites, because they remain preserved in ice basically forever and are easy to find when entrapped in ice, and yes, most of them are really small (gravel size)

However, as previously stated, sealing and metal fatigue are by far most likely.



When I doubt... go running!
User currently offlineyyzame From Canada, joined Jan 2011, 21 posts, RR: 0
Reply 17, posted (2 years 11 months 1 week 1 day 15 hours ago) and read 11048 times:

This isn't that big of a deal .. happen's a lot more than you think it would!

User currently offlinemotorhussy From New Zealand, joined Mar 2000, 3205 posts, RR: 9
Reply 18, posted (2 years 11 months 1 week 1 day 13 hours ago) and read 9531 times:

What does a sudden cabin depressurisation feel like? Would you notice it if it weren't for the popping ears and the oxy masks dropping from the ceiling?

Regards
MH



come visit the south pacific
User currently offlineskysurfer From United Kingdom, joined Sep 2004, 1136 posts, RR: 12
Reply 19, posted (2 years 11 months 1 week 1 day 13 hours ago) and read 8805 times:

Could it be that the outflow valve simply failed?


In the dark you can't see ugly, but you can feel fat
User currently offlinevirginson937 From United Kingdom, joined Jan 2009, 71 posts, RR: 0
Reply 20, posted (2 years 11 months 1 week 1 day 12 hours ago) and read 7802 times:
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Quoting RoseFlyer (Reply 14):
Most airplanes will maintain adequate cabin pressure for 4-5 minutes after a failure of the pressurization system, so that masks are not needed.

I believe depending on the height of the aircraft, the masks drop down at an approx. cabin pressure of 14,000ft. And the time of useful conciousness is decreased as the aircraft altitude increases. What height was the aircraft at when the depressurisation occurred?

Will


User currently offline737tdi From United States of America, joined Sep 2007, 843 posts, RR: 1
Reply 21, posted (2 years 11 months 1 week 1 day 10 hours ago) and read 6361 times:
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Quoting motorhussy (Reply 18):
What does a sudden cabin depressurisation feel like? Would you notice it if it weren't for the popping ears and the oxy masks dropping from the ceiling?

Regards
MH
Quoting motorhussy (Reply 18):
What does a sudden cabin depressurisation feel like? Would you notice it if it weren't for the popping ears and the oxy masks dropping from the ceiling?

Regards
MH

MH: I have never experienced one in flight but have done them multiple times on the ground. Yes your ears go nuts and you can even feel it in your eyes, plus it gets pretty cold.

As a mech. a few years back we used to pressurize DC-8 freighters to about 8psi differential pressure and then manually dump the pressure (it has a "lollipop" that can be lifted to manually open the outflow valve to full open). The cabin would fog up like the worst night in London. Don't worry it doesn't hurt anything! except your ears and it is loud if you are outside the aircraft.


User currently offlineeta unknown From Comoros, joined Jun 2001, 2077 posts, RR: 0
Reply 22, posted (2 years 11 months 1 week 1 day 10 hours ago) and read 6200 times:

Quoting motorhussy (Reply 18):
What does a sudden cabin depressurisation feel like? Would you notice it if it weren't for the popping ears and the oxy masks dropping from the ceiling?

When it happened to me 10+ years ago on an EK 772 (told it was an issue with the air con system freezing up) I don't recall feeling any loss of ear pressure- but I do remember an awfully high pitched whistling noise in the cabin- just when it was becoming unbearable the oxygen masks dropped ("emergency! emergency! emergency!") and we dived to 10,000 feet.


User currently offlinewn700driver From , joined Dec 1969, posts, RR:
Reply 23, posted (2 years 11 months 1 week 1 day 9 hours ago) and read 6103 times:

Quoting motorhussy (Reply 18):

What does a sudden cabin depressurisation feel like? Would you notice it if it weren't for the popping ears and the oxy masks dropping from the ceiling?

It would become very hard to hear, and the cabin would likely fog to the point that you'd have a hard time seeing the person next to as well. I imagine it would be a little disconcerting, but not outright terrifying or anything...


User currently offlineBE77 From Canada, joined Nov 2007, 455 posts, RR: 0
Reply 24, posted (2 years 11 months 1 week 1 day 9 hours ago) and read 5685 times:

Quoting YULWinterSkies (Reply 16):
It is extremely unlikely, but if they cross paths, impact will happen, like for any two objects in movement.

And of course, if the sucker that caused this one hit within say 1000 nm of where you were flying it would ruin your day...
http://en.wikipedia.org/wiki/Manicouagan_crater



Tower, Affirmitive, gear is down and welded
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