I have also heard X4A (nicknamed Broccoli Dreaming) needs an engine change due to metal in the oil. Other rumours I've heard is that it was delivered with a wiring fault that triggers the anti skid warning and that X4B was delivered with 7 open MELs and has minor tech faults most days it flies. Dispatch reliability within 15 mins of STD is 96% though. Flights being cancelled due to crew shortages is confirmed. The ability to recruit up to 10 A220 experienced pilots using permanent residency has resulted in ONE successful application, who was so unrecent on the A220 they are required to do a complete type rating again. Now they are trying to recruit experienced (doesn't have to be A220) training captains using those visas.