Originally Posted by
172_driver
Individual drills?
Even if individual drills are used, these are based on the manufacturer's checklists and/or recommendations. And I am pretty much convinced (or more precisely: 100 percent certain) that there is no manufacturer of pressurised aircraft and no training provider who does not put "don oxygen masks" on top of every checklist related to pressurisation problems.
By the way: I just looked up the loss-of-pressurisation followed by emergency descent checklist of the plane I fly today - also a 500 series Cessna but different model from the accident aircraft: Cessna lists "communicate with ATC" as item number 10 on the list.
And regarding "turning away from the airways" before starting the emergency descent: This is not done in Europe since a long time. And makes little sense because one after the other the countries in Europe are getting rid of their airway systems altogether. With all planes flying between waypoints on individual tracks.