My question is about derated thrust from 26k down to 24k for example, i have provided two links, first link is a picture of TO 26k
https://www.dropbox.com/s/66d0fm3dfk...%2059.jpg?dl=0
Second picture is 24k rated thrust TO1, selected in the FMC N1 limit page
https://www.dropbox.com/s/gzggfkjymp...%2034.jpg?dl=0
You can see on the picture you have an amber marker at the 26k N1 reference bug Green marker.
If i select 24k, is my engine only able to produce 24k of thrust i believe this is true so why does the amber marker stay at same position for 26k? Wouldn't the amber not change and reflect the new derate rating of 24k as this is more limiting and thrust levers shouldn't be advanced beyond the N1 reference green bug.
Also in the FCOM VOL 2; Engines, APU - you have an option without double derate and with double derate. If the operator chooses without double derate the amber band no longer is displayed why is this?