I have searched and found a way to use FSAcars with A320FBW. This is done by adding an offset Lua to FSUIPC. I have tried it and works perfectly. These are the steps to make this work.
1. Get Lua file from the sim flight network forum here.
https://forum.simflight.com/topic/92667 ... ing-brake/ (you will need to register for the forums to be allowed to download)
2. Install Lua (A320ParkBrake) into your FSUIPC folder.
3. Edit your FSUIPC.ini file to add these lines.
[Auto]
1=Lua A320ParkBrake
If you are using profiles then use [Auto.XXXX] where XXXX is the name of your profile.