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Old 20th May 2014, 22:56
  #84 (permalink)  
cosmo kramer
 
Join Date: Jul 2001
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LNIDA:
It just don't get your point here, my margin is not a random personal all I was saying is that if forecast shear and large/rapid temp changes then i feel a little caution is safer than pushing all the way up for often no benefit
Yes caution is in order if in actual turbulence or if it's forecasted ahead.

But, NO, that was not what you were saying before:
LNIDA:
i ALWAYS aim to be at least 1000' below the FMC generated MAX flight level.
But, I am happy if the discussion changed your mind a bit.

LNIDA: FMC MAX ALT 384 you happy with 390 to CRZ after all what the FMC says is just a computers best "guess" based on all of the parameter YOU have entered plus the inputs from the AD
I play with the computer instead of letting it play with me:
http://www.pprune.org/tech-log/52429...ml#post8096769 (post 108 if the direct link doesn't work).
If you don't care to read it, let me ask you: What factors determines the MAX ALT? Which one can we be certain of? And which ones are uncertain? Which ones are factual? And how do they individually affect your max alt?
I can think of one example where I would have no problem climbing to FL390 with max FL384 (or lower) show... It's in the post that I linked to.

Last edited by cosmo kramer; 20th May 2014 at 23:23.
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