Blue Bird Body Company (Blue Bird) is recalling certain 2017-2023 Blue Bird Vision school buses equipped with Roush fuel return lines included in GEN 4 and GEN 5 LPG Conversion Systems that were installed on vehicles sold or registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, Washington D.C., West Virginia, and Wisconsin. The zinc-plating on the fuel return line may break away when contacted by road debris, causing two dissimilar metals on the fuel line to contact each other and corrode.