Thanks for this update, and recent posts with sharing more info on the TAS calculations.
I have not checked, but it is probably the case, that you've calculated with an unchanged TAS at FL375 of 390knots....
Originally Posted by
henra
Thanks mm43 !
That would give us a TAS of 489kts at M0,80 and 500kts at M,82.
Looking at the setting of the RTLU at the time of the beginning of UAS a Mach speed of roughly M0,80 seems likely. So we would be back somewhere around the 490kts and ~4000ft.