I believe we may be getting somewhere lads and lasses. Hop, will you promise me to look up that Boeing flight Bulletin number 1, OCT 99, on the Canadian web page that has just been mentioned, that ADOBE thing. Then please return here and tell the world Boeing is wrong. If my computer know-how was better I could have ended this thread two weeks ago by downloading that very bulletin to PPRUNE. Unfortunately, like you, my computer knowledge is basic.
Your 744 corrects temp error and my 707 doesn't. If you admit there is an error in barometric altimeters what is keeping these two machines apart, LUCK?
PLEASE read the ADOBE file and tell us we are wrong. No more long winded explanations of your theories please. Read the facts and return. I am happy to wait.