Eng 1or2 thrust lever disagree
if failure occurs during T/O fadec maintains tOGA orFLEXthrust untill thrust reduction altitude after which the max thrust available is MCT. only on ground does the Fadec select idle.
In flight
Max power available is MCT
A/THR keep on[ A/THR if not engaged select on]
with auto thrust enaged thrust is maintained automatticaly between idle and higher TLA position.
APP PROC
Once established on loc affected T/L idle and shut.
[it is shut down because when T/L are retarted during flare A/THR would remain in speed mode and during flare the thrust of affected engine would increase to maintain A/THRtarget speed.
so you see it has nothing to with gear being up or down and for G/A MAX THRUST available is MCT.