Transport Canada has issued airworthiness directive CF-2022-41 for Viking Air DHC-3s, requiring detailed visual inspections of the lower engine mount pickup fittings part numbers C3FS46-7 and C3FS46-8, and of the upper engine mount pickup fittings part numbers C3FS42-5 and C3FS42-6, to detect cracking, deformation, corrosion, fretting or wear, paint or surface coating damage and loose, missing or broken fasteners, plus other actions, effective Aug. 18, 2022.