Originally Posted by
SonicFlyer
You realize this is the federal government that you're dealing with, right?
Actually... as far as the Fed is concerned only an ACM in the cockpit is actually an ACM. If you're in the back (and stay there), you're a nonrev per the fed (host airline, and your airline may have different ideas).
Could be awkward if they ask you to come up, that's why I would only ever do it if INVITED to by the CA (I would never ask or presume).
If I was in a nonrev status, had a drink or two, and the fit hit the shan, the CA's emergency authority would suffice to allow me in the cockpit if urgently required.