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Update regarding Orange Line Trains

Posted on May 23, 2022

Following nearly four days of investigations and inspections, new six-car Orange Line trains were returned to passenger service this morning.  

Last week, a new Orange Line train experienced a problem in one of the train’s forty-eight (48) braking units, and it went disabled. Out of an abundance of caution, the MBTA removed all new cars from service while engineers and technicians worked to determine what caused the problem.

Preliminary findings indicate that one bolt in one of the car's eight (8) braking units had not been properly installed at the manufacturing plant. With safety as the number one priority, MBTA vehicle maintenance personnel started a fleet-wide process to verify that each bolt (24 per car, 144 per train) was properly installed. As each bolt on a six-car train passes inspection, the train is being returned to passenger service. To this point in the inspection process, the issue has not been found in any other braking units.
 
The MBTA is grateful to its customers for their patience while the vehicle engineering team worked to ensure that the new cars are performing in a safe and reliable manner. 

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