Does the derated departure only focus on the actual take off....my understanding is that it is right up through to the TOPC(index/cruise climb?????).
If this is the case then I certainly have something to comment on from an ATC and safety point of view (the Airbus 340 will be my first slamdunk if this is the case !!). If not, then I will keep my gobby gob shut.
Fox3snappy
