Originally Posted by
gringo
This is not true; even tough you're sitting in the back, you're still considered an ACM, and "on duty". Yes, even if you're not rated for the airplane you're sitting in. Yes, even if you don't work for the company.
What does this mean? In a nutshell, you can't drink. That's pretty much it.
As an actual "non-rev" you can kick back and enjoy your IFE with a nice glass of wine or a beer. As a "cabin seat jumpseater", you're not supposed to.
Do people do it? Yes. Will they get in trouble if they get "caught" by the flight crew? Maybe. Is it worth the risk to your jumpseat agreements for that drink? No.
True. I just meant that even if there is an open cockpit jumpseat, if there are no open seats in the back you aren't going. It's not that uncommon on some of the US - Europe and Europe - US flights ..