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[HazelNuts39]

cabin v/s advisory

takata;

thank you for your explanations. So, as I understand it now, either the CPC starts sending erratic commands to the outflow valves 4 minutes 16 seconds after the freezing of the pitots, or it is not in control at that point because the negative relief valve is open?

HN39

P.S. The words 'starts' and 'erratic' are, of course, intentionally provocative. Perhaps you should ignore these words.