New Massachusetts Bay Transportation Authority trains which were built in Springfield are being put back in service after they were inspected.
The Orange Line trains were taken out last week because of problems with the brakes.
A bolt was not properly installed at the CRRC manufacturing plant.
MBTA officials say fleet-wide inspections are ongoing, but so far they have found no other issues.
(Photo by Darren McCollester/Getty Images)
Photo: Getty Images