Originally Posted by
mutt
To begin with, Airbus dont combine fixed derates and flex, therefore they are permitted to use flex of 40%, not 25%.
Always assumed (now here's the Boeing term!
) that AST/FLEX is limited to 25% of applicable TOGA, but with derates (no personal experience) you could go lower ... to 40%
Obviously you say otherwise, I promise to do the homework myself but mutt, can you point me in the right direction?
FD.