Hi Heggo, Thanks for the response
Ok, no issues about Q.2. It was to confirm that FL420 is not used and climbing 1000 feet at FL 410 gives the best margin.
However the only issue which I still cannot figure out is the Jeppesen's wording.
Lets focus on Jeppesen's wording regarding climbing, if at FL410. I am deleting the "descend" and "below 410" part since that's not an issue.
According to Jeppesen:
"climb to select a flight level which differs from those normally used by 500ft, if at FL410"
If we climb to FL420 then it differs by the one normally used (i.e. FL 410 in this case) by 1000 feet and not 500 feet.
So according to Jeppesen it should be FL 415, which differs by 500 feet from the one normally used (i.e FL 410 in this case).
I still cant see how you look at it. Am I interpreting "
the one normally used" wrongly?
Regards