PHILADELPHIA — Southeastern Pennsylvania Transportation Authority (SEPTA) officials pulled its repaired railcars from service after inspectors found a design problem over the weekend that resulted in occasional contact between the piece that connects the new beam and the existing equipment, resulting in 18 railcars that had been either returned to service or were ready for service to be brought back into the shop, AP reports.

The problem was not a safety issue, but a design change is being made to preserve long-term equipment quality, SEPTA officials said. Those cars are expected to be available later in the week. Earlier this summer, SEPTA pulled 120 railcars to fix beams in their suspension systems and began returning some of them to service this month. For the full story, click here.