Originally Posted by
AerocatS2A
The problem here is that they’re not separate failures in terms of performance. If you have slats and flaps at 0 you don’t take the worst of a slats OR a flaps failure, you have to combine them. Flysmart will consider combinations of slats/flaps failures and will give the correct delta Vref, eg +45 for slats<1 and flaps<1, but doesn’t apply the same logic to a G+Y LO
PR and a slats failure.
This is identical to what the QRH does. It has performance for combined slats/flaps failures but does not have performance for other combinations. Presumably this is because the various flap/slat combinations are normally just different products of the one failure.
When the OP checks the QRH table for slats and flaps < 1 they are doing exactly what they should do in Flysmart. Put the complete wing surface position in as a separate failure, not just the slats, so that Flysmart can give the appropriate Vapp corrections and the appropriate performance penalties for stopping on the runway.
Sorry, re-read the OPs original point.
Flysmart leads you up the garden path a bit here, multiple failures like this are deemed so rare that Airbus considers it negative training.
However, if it were to happen, you would have to consider it a Flaps Slats locked scenario and act accordingly.