Using 'Arma 3' Preset Controls
Trying to bind 'A' or 'D' keys to:
1) Left/Right Pedal
2) Left/Right Turn
3) Auto-hover On/Off
will show that the keys are red, currently bounded to 'Bank Left/Right', which are missing.
Trying to bind 'A' or 'D' to the Cyclic or Collective variants however will not return you with the red notification.