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Thread: Emergency Descent
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Old 28th July 2007 | 00:22
  #8 (permalink)  
411A
 
Joined: Mar 2000
Posts: 8,571
Likes: 3
From: Arizona USA
all modern QD masks will increase the O2 mix up to 100% with cabin alt and provide pressure breathing at higher cabin alts @320 and above.
Yep, been this way since the B707 days...
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