Bolt blamed for disabling of new Orange Line train
T says part was installed improperly during manufacturing process
THE MBTA said a four-day investigation revealed that an improperly installed bolt in a braking unit disabled one of the new Orange Line trains last week, prompting the transit authority to remove all the new trains from service.
In a statement issued Monday morning, the T said each of the 24 bolts per car and 144 per six-car-train set will be checked on the new vehicles cand they will be returned to service as they pass inspection.
The decision to remove all of the new train sets from service came as officials from the Federal Transit Administration are on site at the MBTA investigating the agency’s safety practices.