increasing thrust passing accel alt wouldn't make sense.
so the more you had reduced during T/O the less you get for climb.
you can see it on the N1-page when you enter the ass Temp and the derate. on the right side the " <act> " jumps down.....
reminds me of my supervision: checker says "see that R-TO indication there? why is it there?"
me goes: "i dunno, i didn't touch it"
