To get full thrust on take off you manually move the thrust levers to the red line on the N1 display after they are in THR HOLD. On approach 1st push of TO/GA FMA thrust indication is GA and auto trust advances to reduced go around N1 to produce 1000-2000 fpm rate of climb. Second push of TO/GA after A/T reaches reduced go around thrust A/T advances to full go around thrust N1 limit and auto throttle FMA is N1.
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