Machinbird, If one goes "by the book", the PF orders "ECAM Actions" or "Stop ECAM Actions" as necessary. In other words, the PF should be in command of the situation. I would not expect the PM to proceed with ECAM actions outside of my command. At the very least, the PM should query the PF for guidance before beginning ECAM actions.
In reality, I suspect that some PM's might begin the actions if they perceive the PF to be overloaded and they believe the ECAM actions beneficial to resolving the issue. If I believed the PF, in my case that would be the First Officer, to be in difficulty flying the airplane, I would take over. I believe that my First Officers would likely do the same if they believed I was having the same difficulties. They would likely wait slightly longer before taking over from the Captain, but they would take over.
Last edited by TTex600; 23rd Nov 2011 at 20:06.