The MBTA is returning to older model trains after pulling new Orange Line and Red Line trains Thursday.
According to a statement, " at Wellington Station, a new Orange Line train experienced a problem in one of the train's multiple braking units, and it went disabled. The issue never presented a hazard for riders nor employees, but the train was removed from service for an inspection. While the MBTA works to determine the exact cause of the failure, a proactive decision has been made to keep all of the new trains out of service while the vehicle engineering and technical teams troubleshoot the problem."
Before they were pulled, there were 64 new Orange Line cars and six new Red Line cars being used for service.
Many of the cars were assembled at the CCRC plant in Springfield.
(Photo by Maddie Meyer/Getty Images)