Another on the airbus is the ice detector light, which fails quite a lot. Apparently the whole screen has to be practically removed so an engineer told me the other week - a real long and arduous task I'm sure. Obvious answer is leave it after it's broke, and fall back on the good old torch to check for ice at night........
He was exaggerating ever so slightly. If it's the lamp it takes about 2 minutes , if the whole assembly needs doing it takes about an hour max.
Simple and easy job unlike some others on the mini 'bus I could mention.
As for failures - we seem to have a whole load of RTL failures for some reason.