In every airline there is a calculation for losing crews per year.. Generally it is about 10%;
RAT 5, 10%?? That's unsustainable. I remember a senior in EK say they were running at 4% and he said that was worrying. 400 is 13% and the rumour is they are working their notice so could extrapolate to 400 every 3 months, yikes. It's either wrong or very worrying