How many times, in what circumstances, and for what reasons, would turning off a FAC by done in the sim ?
Is it implicit in those sim exercises that the the flight envelope functions remain engaged, always, or not ?
Actually, this (FAC1+2 Fault) was one of the main topics in my last sim session - the sim was setup with one 1 FAC Inop (according to MEL) and then the instructor failed us the second one after departure - it's a pretty straightforward procedure, just follow the ECAM, the only 'challenge' is that you loose both Autopilots, both Autothrust Channels and normal law, so you have to fly manually all the time. And while its true that you don't switch off the flight envelope function of the FAC by switching of the pushbutton, the aircraft should drop you to alternate law, if you turn both FACs off, so you loose protections (except loadfactor protection) - even if their computation is faulty it should not be affecting the flight too much...