New Orange Line Trains Temporarily Pulled From Service

BOSTON, MA — The new Orange Line trains have been temporarily taken out of service, the MBTA said Tuesday. Inspectors identified a fault with the bolsters, which allow the wheels and their frames to rotate and maneuver turns in the tracks, according to the agency.

The MBTA expects to return the trains to service later this week.

"Fault detection with new trains is expected during early stages of production and service," the MBTA wrote on Twitter. "During this phase, we employ a high level of scrutiny to proactively address any potential issues and optimize performance for a more efficient release of future Red and Orange Line trains."

This isn't the first time the trains have been temporarily pulled from service since hitting the tracks last August. In September, the MBTA fixed a problem with a door component.

The agency plans to completely replace the Orange Line fleet with 152 new trains by the end of 2022. The trains have more space inside, wider doors, LCD screens and more handrails.