Mike,
if the engines produce more than a given amount of thrust (I can't remember how much but it might be 1.15 epr) there is a master warning alert
Probably not operative in flight though? Part of the takeoff warning system? Any warning in flight that you know of?
For any and all: since the Boeing system uses the normal brakes, would locked wheel protection be available while landing with the PB ON? The Airbus most assuredly bypasses that protection.
GreenArc