Metro said an initial investigation into Tuesday evening’s fire on the Red Line showed that a power cable under a train was struck by a loose part, touching off a fire that filled the Silver Spring station with smoke and delayed riders for hours.
Officials said Wednesday that the “root cause of the incident remains under investigation” and that there has been “no final determination.”
The Tri-State Oversight Committee, which monitors the safety of Metro operations, said it is tracking the investigation. “We are going to make sure they’ve done a thorough job looking into this so they can get to the bottom and stop these types of incidents from happening in the future,” said Jim Benton, the committee’s chairman.
Benton said initial reports appear to indicate damage to the equipment that carries power from the electrified third rail to the train. The damage to the train’s “collector shoe” may have allowed the power cable, carrying 750 volts, to come into contact with the metal-lined hose, sparking the fire, according to Benton.