When must oxygen masks be removed after decompression?

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When must oxygen masks be removed after decompression?

During a decompression, oxygen masks provide breathable oxygen to prevent hypoxia. They stay on until the flight deck announces that the cabin altitude is safe. That specific declaration means the cabin has returned to a breathable pressure and it’s safe to discontinue oxygen use. The exact moment isn’t tied to a fixed altitude or to everyone being seated; it’s the crew’s announced clearance that signals it’s appropriate to remove the masks.

During a decompression, oxygen masks provide breathable oxygen to prevent hypoxia. They stay on until the flight deck announces that the cabin altitude is safe. That specific declaration means the cabin has returned to a breathable pressure and it’s safe to discontinue oxygen use. The exact moment isn’t tied to a fixed altitude or to everyone being seated; it’s the crew’s announced clearance that signals it’s appropriate to remove the masks.

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