Obie, I am cruising at 2000' above my FMC optimum altitude. Enter cloud and the SAT increases by +20C...By how much would the optimum altitude change in your aircraft?...It happens...unless of course..Sir Richard is correct!
Experts..definitive answer on this one please..real temp rise or indicated due temporary icing effect!
Last edited by Yaw String; 10th June 2009 at 17:10.