Originally Posted by
Three Green
Dude, with the type of flying we do, it will never be an issue. You are in the 121 world now.
?
Airplanes operated under 121 certainly aren't exempt from losing cabin pressure. As was stated above, if the grid MORA is green, you are good to descend to 14,000 ft in an emergency. If it is magenta, you had better level off higher.