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Old 16th Dec 2022, 14:07
  #80 (permalink)  
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Originally Posted by Eclan
I don't think anyone said the cabin altitude alerting system failed. It defaulted, according to this theory, to a higher trigger value but did not fail.
There would be Cabin Altitude EICAS messages alerting them of the problem. If it gets the the stage where hypoxia becomes a possibly (FL150 or above) then the Cabin Altitude warning would wake the dead.

If you can understand the above factors you can see how a gradual decompression fits the theory neatly.
Not neatly at all. So according to this “theory” there was a gradual leak, that went unnoticed by the crew, even though EICAS should alert them if cabin altitude is rising, even gradually. It got to just below 15,000 ft, in which TUC should be well more than 30 minutes, so as to not set off the very audible Cabin Altitude Warning, significantly decreasing their mental capacity to the point within 10 minutes they couldn’t make a decision to descend. But then, for some reason, they regained some level of mental capacity 20 minutes later to turn right, exactly overhead Penang. Then kept that mental capacity for another 30 minutes to turn out over the ocean?

I know how Hypoxia works. But the facts of the case don’t match up with a hypoxic scenario.

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