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14th November 2002 | 01:58

#1 (permalink)

wingtip777

Joined: Apr 2002

Posts: 89

Likes: 0

From: w

crew oxygen?

could anyone tell me this: how long can the crew oxygen be used in case of depresurisation on the boeings(eg. B777)?

another question:at 20000feet, how long does it take a person to be unconscious?