Oxygen system ATR72
I wonder if any kind engineer could help out?
I have just started training on the ATR72 and I was reading before the course that the fixed oxygen supply in an emergency is 15 mins for the flight deck and 30 mins for the cabin. Could anyone explain how this is supplied and is the difference due to the the cabin supply being mixed with ambient?
I know this will be in the manuals but we don't have them as yet.
Cheers