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Time To Repair An A/c When Depressurization

Sun Feb 20, 2005 10:19 pm

How long does it take to repair an aircraft that suffers from a Depressurization event, that is to reset the O2 masks, covers, and the system over the time required physical repairs that must be done to an a/c to fix the original cause of the Depressurization?
Also, what is the most common cause of Depressurization?
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RE: Time To Repair An A/c When Depressurization

Sun Feb 20, 2005 11:33 pm

This is a very rare occurance that typically would result from pretty major failures.

Furthermore any airplane whose sevice ceiling is above 42,000 feet (41,000 feet in Canada for some reason) must comply with a "special condition" for high altitude flight.

This special condition requires analysis that shows that the chances of a decompression is in the order of one occurance in one billion flight hours. So its really not likely.

I've seen the masks come down several times for testing or inadvertantly by maintenance. It really sucks on large airplanes can can take several hours to restow the masks.

As for physical damage, unless you are talking a bomb, again its unlikely. And damage from a bomb typically doesn't need to be repaired. If you know what I mean...

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RE: Time To Repair An A/c When Depressurization

Tue Feb 22, 2005 2:47 am

Resetting the O2 masks can be time consuming.
Although to test the deployment of O2 masks does not need the O2 mask panel to open fully if placed in test mode,by use of the panel latch.
This helps in testing.
what is the most common cause of Depressurization
Blown window,very rare though.
Leaking seal.
Faulty OFV.
to name a few.
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