Originally Posted by
CanadianAirbusPilot
Some times the FMGC is not to be trusted (wrong des speed in the box or a very early Decel pt showing you at green dot over your restriction vs 250 as an example).
Good point. A quick calculation can verify proper (or improper) FMGC entries in descent or fix crossing speed. It can indicate whether an idle path or geometric path is being used by the FMGC for planning or if FMGC descent winds need updating, etc.
We’re paid to think.