Quick question for the Airbus drivers..
If you select a rapid decent on the Auto-pilot (3300pm) for a emergency (decompression) would the A320 recognise over speed and deploy the spoilers accordingly to slow the aircraft down
SOP AP Mode for Decompression Descent is OP DES (FL CH for Boeing types), which is idle, and Pitch v IAS/M. By manually selecting speedbrakes, you can increase the RoD in that mode.
In case of overspeed, the protections will control the speed via pitch. I would have to remind myself what will happen if you OP DES at, say 0.8M, when IAS becomes limiting. Not sure if it switches to IAS automatically - I tried to get someone else to look at that earlier
