Originally Posted by
OPEN DES
RWU is spot on. Your descent path is still assuming 280 knots.
Once I pull speed, the SPD value on MCDU changes from managed to the selected one. I always assumed, that this indicates the profile have been re-calculated. Also, 15 NM after T/D, I select SPD 220 kt, all of a sudden FMGS indicates 4500 ft too high on PROG page ? True or false? Honeywell pegasus 2+ softeware?
K340: It is very likely that you would get a "SPD ERROR AT xxxx" message. At higher altitudes THR IDLE descent is
not based on idle thrust :ugh, so you can always drop below with OP DES, and deccelerate to match the constraint with no airbrakes. OTOH, I find that below approx FL200 THR IDLE descent is based on true idle thrust, so a speedbrake (or better descent planning) is unavoidable.