The National Transportation Safety Board (NTSB) is providing the following information to urge the Southeastern Pennsylvania Transit Authority (SEPTA) to take immediate action on the safety recommendations in this report concerning electrical fires aboard Silverliner IV railcars in passenger service. We identified this issue during our investigation into a February 6, 2025, fire in Ridley Park, Pennsylvania, and four additional fires involving Silverliner IV railcars over the following months.