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Airbus 320 Cargo Doors Come Flying Out!  
User currently offlineFlyboy80 From United States of America, joined Jul 2001, 1881 posts, RR: 3
Posted (11 years 2 months 1 week 5 hours ago) and read 11907 times:

Hi, I've noticed on a few occasions that when the main cargo doors are opened on airbus 320 series aircraft, that the door budges out immediately! Why does this occur? Isn't it kind of a safety hazard, I wouldn't want to be standing in the way when it happened. When airlines train ground personal for this aircraft, do they warn them about this??? Also, I've never noticed it on any other aircraft such as the 757, but maybe it occurs on other aircraft as well? Thanks for any information on this subject!!

19 replies: All unread, jump to last
 
User currently offlineAWA22 From , joined Dec 1969, posts, RR:
Reply 1, posted (11 years 2 months 1 week 2 hours ago) and read 11812 times:

Its caused from residual airpressure and I am sure all airlines warn the ramp people about it. At HP they sure do and when you open it you want to stand to the side.

User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 34
Reply 2, posted (11 years 2 months 6 days 20 hours ago) and read 11724 times:

Cargo doors on Airbus's are opened hydraulically versus electically on Boeing or MDD aircraft. The exception being the main deck cargo doors on freighters which open hydraulically.

With a door connected to an electrical actuation system it usually doesn't move much when it is unlocked.

With a door connected to a hydraulic actuator with the pressure bled down, the door quickly creeps down when it is unlocked. Yes, you most certainly should be aware of this.

If the aircraft has residual air pressure onboard, the door will violently swing open. Fedex has warning devices on each door to warn of this condition while Dc10hound advised AA has deactivated thiers.



You're only as good as your last departure.
User currently offlineFlyboy80 From United States of America, joined Jul 2001, 1881 posts, RR: 3
Reply 3, posted (11 years 2 months 6 days 18 hours ago) and read 11654 times:

So this is like air escaping rapidly pushes the door out?

User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 34
Reply 4, posted (11 years 2 months 6 days 17 hours ago) and read 11642 times:

>>>So this is like air escaping rapidly pushes the door out?<<<

No, this is the door quickly drooping under its own weight due to the hydraulic actuator being depressurized therefore unable to keep the door closed.







You're only as good as your last departure.
User currently offlineMD11Engineer From Germany, joined Oct 2003, 14139 posts, RR: 62
Reply 5, posted (11 years 2 months 1 day 17 hours ago) and read 11360 times:

Having changed and ajusted plenty of A320 family cargo doors I have to confirm that they are hydraulicaly operated. Due to their center of gravity they hang a little bit to the outboard when the actuators are not pressurized (about 12 inches). They are closed during hose last 12 inches by hydraulic pressure and then kept in position by hooks which capture big bolts at the door sill, as well as two side lock bolts, which extend into holes in the door frame. Once you release the close/open valve handle there is no pressure supply to the actuator anymore and residual pressure bleeds off to the yellow reservoir. So if you unlatch the door after a certain time it will swing ut a bit under its own weight. The latching and unlatching is being done by rotating the door lever. When you push the lever in, you´ll lock the latches so that they are positively unable to unlatch, and at the same time close a small pressure relief door in the cargo door. When you pull out the handle the relief door opens and bleeds of residual air pressure in the cargo hold, so that the the cargo door will not come out by force. BTW, after installation of a cargodoor you will have to check that there is no closing pressure on the door actuators after 5 minutes, simply by unltching the door an seing it drop.

Rgds,

Jan


User currently offlineFelinemech From United States of America, joined Sep 2009, 1 posts, RR: 0
Reply 6, posted (5 years 3 months 2 weeks 2 days 12 hours ago) and read 9803 times:

Can you guys answer this question....are the 320's cargo floor boards made out of composite material? If so, what type? Are they frequently damaged? Is there some type of scheduled inspection to comply with specifically for the cargo floor boards?

User currently offlineMD11Engineer From Germany, joined Oct 2003, 14139 posts, RR: 62
Reply 7, posted (5 years 3 months 2 weeks 2 days 10 hours ago) and read 9743 times:



Quoting Felinemech (Reply 6):
Can you guys answer this question....are the 320's cargo floor boards made out of composite material? If so, what type?

Yes. Fiber glass honeycomb composite.

Quoting Felinemech (Reply 6):
Are they frequently damaged?

Not too often (at least on aircraft with container loading system, I don´t know about those for loose cargo.

Quoting Felinemech (Reply 6):
Is there some type of scheduled inspection to comply with specifically for the cargo floor boards?

Not that I know of, we checked them during C- and D-checks for condition and repaired them accordingly. I assume that at least the weekly checks contain a visual inspection of the cargo holds,

Jan


User currently offlineBrandi747 From United States of America, joined Aug 2009, 15 posts, RR: 1
Reply 8, posted (5 years 3 months 2 weeks 2 days 4 hours ago) and read 9630 times:

As a ramper this does come as a suprise the first couple of times but then you get used to dodging.... Smile


Come fly with me.
User currently offlineWn676 From Djibouti, joined Jun 2005, 1077 posts, RR: 4
Reply 9, posted (5 years 3 months 2 weeks 1 day 18 hours ago) and read 9418 times:

There's an A321 recently delivered to us that has become a bit famous for the way the cargo doors open, apparently knocking a few to their feet. It seems they open a bit more violently than the rest for some reason.


Tiny, unreadable text leaves ample room for interpretation.
User currently offlineWirelock From Spain, joined Sep 2007, 126 posts, RR: 0
Reply 10, posted (5 years 3 months 1 week 5 days 7 hours ago) and read 8851 times:



Quoting Felinemech (Reply 6):



Quoting Felinemech (Reply 6):
Can you guys answer this question....are the 320's cargo floor boards made out of composite material? If so, what type? Are they frequently damaged? Is there some type of scheduled inspection to comply with specifically for the cargo floor boards?

yes the floor boards are composite.
sometimes they come with a layer of aluminum on top to protect against damage.
aircraft with CLS are less prone to damage floors in the cargo. cargos with manual loading get regular damage to floor boards.
slopes and floor boards are considered aircraft structure and the damage limits and repair can be found in the SRM.
the sidewalls and ceilings can be found in ATA 25


User currently offlineMaverick623 From United States of America, joined Nov 2006, 5740 posts, RR: 6
Reply 11, posted (5 years 3 months 1 week 3 days 12 hours ago) and read 8621 times:



Quoting Wn676 (Reply 9):
apparently knocking a few to their feet.

That thing almost knocked me out cold... less than an inch from hitting my head. As it is I leaned back so much I tweaked my back. Scared the bejeezus out of the guy pulling up the belt loader.

That one is because for some reason the doors loose all their hydraulic pressure.



"PHX is Phoenix, PDX is the other city" -777Way
User currently offlineTWAL1011727 From United States of America, joined Mar 2006, 638 posts, RR: 0
Reply 12, posted (5 years 3 months 1 week 2 days 20 hours ago) and read 8507 times:



Quoting Flyboy80 (Thread starter):
the main cargo doors are opened on airbus 320 series aircraft,

I'd much rather deal with the A320 doors than the B727-200 cargo doors.
They were such a pain in the ass.
Same droop...but you would have to extend the hold open rod till it
clicked extended then use brute force to open the door and lock the rod in its holder.
After a while it was pretty easy except when the spring assist didn't work.

It was fun to see newbys try to open them...

KD


User currently offlineSancho99504 From United States of America, joined Dec 2005, 576 posts, RR: 0
Reply 13, posted (5 years 3 months 1 week 21 hours ago) and read 8339 times:



Quoting Maverick623 (Reply 11):

Was training a guy in SEA on a CI A340 and told him stand to the side when you pull the handle. Needless to say he didn't listen and had to get 14 stitches.

Quoting Wn676 (Reply 9):

Doors on the A330 and A340 seem to drop harder than on the A320 and A300......and Is the door weight on the A321 heavier than the smaller busses?



kill 'em all and let God sort 'em out-USMC
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 14, posted (5 years 3 months 1 week 21 hours ago) and read 8335 times:



Quoting AWA22 (Reply 1):
Its caused from residual air pressure

AAah No... By the time the plane pulls up to the gate cabin pressure is the same as the field. Also, when you push open the vent flap the cargo air is directly open to the outside air.



"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineStratosphere From United States of America, joined Sep 2007, 1656 posts, RR: 5
Reply 15, posted (5 years 3 months 1 week 16 hours ago) and read 8272 times:



Quoting TWAL1011727 (Reply 12):
I'd much rather deal with the A320 doors than the B727-200 cargo doors.
They were such a pain in the ass.
Same droop...but you would have to extend the hold open rod till it
clicked extended then use brute force to open the door and lock the rod in its holder.
After a while it was pretty easy except when the spring assist didn't work.

It was fun to see newbys try to open them...

You got that right..When the wind was blowing it was even worse..I seen many a ramper hurt on the 727 doors.



NWA THE TRUE EVIL EMPIRE
User currently offlineSancho99504 From United States of America, joined Dec 2005, 576 posts, RR: 0
Reply 16, posted (5 years 3 months 1 week 1 hour ago) and read 8183 times:



Quoting FDXmech (Reply 2):
The exception being the main deck cargo doors on freighters which open hydraulically.

Aren't the main deck doors on the 747F and DC10/MD11 electric? I know for a fact that both the nose door and side door on the 747f have a limits on operation such as in wind above 35 knots for nose door and 45 knots for side door, door operation is prohibited, atleast on CV and PO due to the possibility of burning out the electric motor.



kill 'em all and let God sort 'em out-USMC
User currently offlineCCA From Hong Kong, joined Oct 2002, 846 posts, RR: 14
Reply 17, posted (5 years 3 months 5 days 17 hours ago) and read 8009 times:



Quoting Sancho99504 (Reply 16):
Aren't the main deck doors on the 747F and DC10/MD11 electric? I know for a fact that both the nose door and side door on the 747f have a limits on operation such as in wind above 35 knots for nose door and 45 knots for side door, door operation is prohibited, atleast on CV and PO due to the possibility of burning out the electric motor.

Yes as you say 747 main deck cargo door are electric, same as the lower ones (ex the bulk door).

I don't know about the MD11/DC10.



C152 G115 TB10 CAP10 SR-22 Be76 PA-34 NDN-1T C500 A330-300 A340-300 -600 B747-200F -200SF -400 -400F -400BCF -400ERF -8F
User currently offlineWn676 From Djibouti, joined Jun 2005, 1077 posts, RR: 4
Reply 18, posted (5 years 3 months 5 days 13 hours ago) and read 7971 times:



Quoting Sancho99504 (Reply 13):
Doors on the A330 and A340 seem to drop harder than on the A320 and A300......and Is the door weight on the A321 heavier than the smaller busses?


Not at all, they all share the same size door as far as I know.

If there's one thing I like about our ex-Braniff A320s, it's the older style door handles. It makes it much easier to stand to the side and turn the handle towards you instead of having to stand directly in front of the door to push the handle up.



Tiny, unreadable text leaves ample room for interpretation.
User currently offlineSancho99504 From United States of America, joined Dec 2005, 576 posts, RR: 0
Reply 19, posted (5 years 3 months 5 days 4 hours ago) and read 7927 times:



Quoting Wn676 (Reply 18):
If there's one thing I like about our ex-Braniff A320s

I take it you work for HP?
I personally like the new style handle as it seems the locks hold longer on those doors than the older ones so you don't have to run to the door the get the handle locked.



kill 'em all and let God sort 'em out-USMC
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