Now what is the difference between overspeed protection and max N1/EPR?
I seem to reacll
Two different levels above a set speed, The overspeed is a higherlevel protection that assumes the engine has likely damaged itself or about to do something really bad. It shuts down the engine to idle and locks it out from going above idle.
The later limit is a controlling limit that it tries to control below some safe demonstrated RPM
happy to hear from others