McDonald's Faces Lawsuit Over McRib Availability, US Judge Rules

• A US judge has ruled that McDonald's must face a lawsuit over the McRib sandwich.
• McDonald's has sold the McRib periodically since 1981.
• The lawsuit pertains to the intermittent availability of the McRib sandwich.
• The decision allows the lawsuit to proceed without dismissing it.
• No further details on the lawsuit's specifics are provided in the source material.