Originally Posted by
Pander216
Are you talking about the Airbus? The name of the knotch says it allready: ''Max continious thrust'', so any powersetting at or below ''Max cont thrust'' can be selected for an undefined ammount of time

I am sure that you do not understand the labels on the detent and the meaning of thrust lever being placed in it. The procedure how to select MCT from takeoff power is to move the levers from the FLEX/MCT detent into the FLEX/MCT detent and you have a different powersetting.
Gearpins: I think yes, for all you know the actual tkof setting may be still above MCT so you need to observe the engine limitations. If your actual flex puts you below MCT then as you set it nothing happens, or even better (?) you get a thrust increase. But that is just my speculation as I do not know if any reduced thrust (regulatory max 25%) would be less than MCT and what would be the A/THR reaction to it. What would a pilot do manually is well clear, there are options.
Either way around, after 10 minutes you cannot go wrong.
FD,
(the un-real)