Originally Posted by
compressor stall
1. Never seen it across 319s of moderate age and different engine types.
Your tech pilots should be able to answer if it's peculiar to your fleet/FMGC logic or some other thing, or at least email Airbus for tech request for one.
Well, I can say that it used to be an everyday occurrence on older 319s at our US airline; if you used speedbrakes with flaps 2 or greater, the speed would never come back to Vapp. It would settle about 3-5 knots faster. You could disconnect and reconnect Autothrust, and then the speed would be correct.
Speedbrakes with Flaps 1 would not show this discrepancy.
Some recent (within the past two years or so) change got rid of this glitch.