I have heard the term "firewall power" used before but I had a few questions about it. What I understood is that it basically meant pushing the throttles as far as they would go. I assume that this was reserved for emergency situations (beyond normal go around power) like microburst or something.
My question is, what is firewall technically, and underwhat circumstances, if ever, would it be used? Also, would this be something that would have a command to override an Auto Pilot that prevents such power from being used, or does it simply, in Airbus, Boeing whatever, mean advancing the throttle levers as far as they will go?
Thank you for your time,