Thank you for the replies. I had thought that with 1800 psi in the tank and regulated down to 80 or so psi on our guages that no matter what the pressure was outside, as long as you had the mask sealed to your face especially with emergency flow, you could suck in plenty of oxygen. Perhaps someone on a cargo plane could be tempted to continue after a depressurization to their destination.
>- Approach used in Concorde, very small windows, very powerful >cabin compressors, and the ability to maintain a survivable cabin >pressure (that is below FL250 equivalent) despite a given >number of failed windows.
According to the article that started my first question...a transport category cabin must be pressurized so that it maintains an altitude of no more than 8,000 feet. For certification for operation above 25,000 feet, any probable failure can not allow the cabin equivelant altitude to exceed 15,000 feet For any other failure that leads to decompression that is not shown that is not shown to be extremely improbable, cabin altitude must not exceed 25,000 feet for two minutes and cannot exceed 40,000 feet at any time.
Last edited by thx1138; 5th Oct 2002 at 02:23.