NTSB Issues Urgent Recommendations on Fire Risk for SEPTA Railcar Fleet

​​​Safety agency urges immediate action to address unacceptable safety risk

WASHINGTON (Oct. 1, 2025) - The National Transportation Safety Board Wednesday urged the Southeastern Pennsylvania Transportation Authority to act immediately to eliminate fire risks in its fleet of Silverliner IV railcars.

The NTSB concluded that the outdated design of the Silverliner IV railcars, in combination with SEPTA's maintenance and operating practices, represents an immediate and unacceptable safety risk because of the incidence and severity of electrical fires that can spread to occupied compartments. Additionally, the NTSB found that the risks posed by the design cannot be fully addressed without an extensive fleet retrofit or replacement.
The NTSB also found that SEPTA's current operating practices have failed to protect passengers and crews because defective railcars have been kept in passenger service.

The NTSB issues urgent recommendations to address immediate, critical issues that threaten lives or property. The NTSB does not need to wait until the end of investigations to issue recommendations. Recipients have 30 days to respond.

The recommendations stem from the NTSB's investigation of a Feb. 6 fire in Ridley Park, Pennsylvania ​, as well as four other Silverliner IV fires: Levittown, Pennsylvania, June 3; Paoli, Pennsylvania, July 22; Fort Washington, Pennsylvania, Sept. 23 and Philadelphia, Sept. 25.

Investigators said the recurrence of fires -- despite SEPTA's attempted fixes -- shows organizational lapses that block effective risk mitigation. The NTSB said SEPTA's proposed changes to its operations, maintenance and engineering activities require ongoing monitoring to ensure they protect passengers and crews.

​Damage to a SEPTA Silverliner IV railcar involved in the Ridley Park, Pennsylvania, fire on Feb. 6. Photo credits: SEPTA (left) and NTSB (right)​​

The urgent recommendations call on SEPTA to:

• Suspend operation of the Silverliner IV fleet until the transit agency determines the root causes of fires, develops and implements a plan to address these causes and identifies and corrects the organizational factors that have prevented effective risk mitigations.
• Implement a plan to monitor the success of its risk-mitigation approach to the Silverliner IV fleet, including provisions for immediately removing the fleet from service again if its mitigations fail to prevent fires.
• Create an expedited procurement or retrofit schedule and seek funding from appropriate sources as soon as possible to accelerate the replacement of the Silverliner IV fleet or its retrofit to include modern feedback systems and meet federal fire safety standards for new railcars.​

​The full urgent safety recommendations report is available online at ntsb.gov.​​​

This media release was updated to correctly identify Levittown, Pennsylvania, as the location of the June 3 event.