Summary
We propose to adopt a new airworthiness directive (AD) for Viking Air Limited Models DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300, and DHC-6-400 airplanes. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as aileron cable wear or fouling at the wing root rib, fuselage skin, and wing root rib fairlead, or fraying of the cable from the root rib fairlead. We are issuing this proposed AD to require actions to address the unsafe condition on these products.