sho69607 Posted November 26, 2018 Report Share Posted November 26, 2018 Is the oxygen switch supposed to be on the entire flight or only activated in the event of loss of cabin pressure? 1 Quote Link to comment Share on other sites More sharing options...
Goran_M Posted November 26, 2018 Report Share Posted November 26, 2018 The switch pressurizes the system. If you don't pressurize the system, you won't get oxygen through the masks when putting them on, and a blackout will occur. Quote Link to comment Share on other sites More sharing options...
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