The Same question was raised during my last sim session at Airbus Miami, After Engine Failure At V1 , ( Working out of JFK 31L Canarsie Climb) My sim partner was alarmed to see the Sim Banked over @ 30 degrees during a EFTO, AP engaged, The instructor promptly said u engaged the AP at a speed higher than V2+10 hence it respected the SID Nav constraint and since u had a speed higher than V2+10 did away with the 15 degree limit. Ah AIRBOOS LOGIQUE. after 5 yrs still have to ask is it doing what i want it to?
We had an incident where the SID calls for left turn and climb to 4000 to get away from the terrain, had light A320@ 115Klbs on a ferry to MTC base, used TOGA as per the MEL , rocketed off like a bat out of hell and once the AP engaged does it follow the FMS/SID no it promptly turns into the terrain, disconnect and hand fly the DP, on landing call Flight Ops/Training who then call the Airbus Rep, his reply was the FMS Calculated that due to the high Rate of climb that the terrain restriction would be met and so went for the shortest distance to the next waypoint hence a right turn instead of the left turn In the SID. Ah joy!