assumed and derated takeoffs

[A340AM]

Hi guys

Could someone please explain the difference between assumed temp t/o and the derated t/o in terms of when it can be used and when one could overlap the other etc

nd how it works particularly for the 737

i also read that a derated t/o allows for a higher mtow
could someone phrase it out nicely
thanks

[KBPsen]

Use the search function. The topic has been done to death already.

[de facto]

Yes subject is the most talked about here with who is a troll and who isnt along with the pros and cons of PTF.