The MBTA reports it pulled all the Springfield-assembled bingbingbing Orange Line trains today after one of them "experienced a problem" in one of its braking units and it pulled up lame at Wellington, where new Orange Line trains go to die.
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. With safety being the top priority, the MBTA took this action out of an abundance of caution.
Fortunately, the T has yet to actually scrap all the rec-room models and so put some of those into service - with the caveat that "wait times at station platforms will be slightly longer, with trains arriving approximately every 8 ½ minutes this afternoon."