Checkboard: I must make an embarassing admission. For all the numerous... years I've flown fanjets, nobody has been able to explain to me just what sort of engine stress is caused by exceeding EPR limits, unless it is some connection between N1 and N2 limits, maybe a combination?
Although this is purely academic and is not required knowledge at this airline, or in Navy Reserve squadrons, from a realistic cockpit perspective (knowing that we do our best to constantly adjust the EPR for the limits, but don't pull it back at our company during takeoff even if EGT is in the yellow arc), it would be interesting to finally understand it.