A320 Master Caution attention-getter
When the master caution button lights up in yellow, but on one side displaying only CAUT (lower part of the button) and on the other side only MASTER (upper part of the button), without any sound or ECAM warning, what does that mean??
As I remebmer from few years back, it meant something like FWC doesn't function normaly or has some misbehaviour but I cannot find the reference anymore.