Transport Canada has issued airworthiness directive CF-2021-52, a blanket alternative means of compliance with the Transport Canada airworthiness directive prohibiting operations requiring radio altimeter in the presence of 5G C-Band wireless broadband interference, for all transport and commuter aircraft equipped with a radio altimeter made by Airbus, Bombardier, Embraer, Pilatus, Fokker, Saab, De Havilland Aircraft of Canada, Airbus Canada, ATR, Yaborã Indústria Aeronáutica, MHI RJ Aviation, BAE Systems and Viking Air.