Metro

Orange Line delayed after train’s air bag explodes

The MBTA’s Orange Line is delayed this morning, after an undercarriage airbag, part of the train’s suspension, exploded and forced a train out of service, the MBTA said.

The Orange Line train’s airbag malfunctioned, causing a “loud bang,” MBTA Spokesman Joe Pesaturo said.

Passengers were asked to exit the train and board a train behind it. The disabled train was moved out of the station, Pesaturo said.

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The train’s airbags “are similar to the shock absorbers you find on motor vehicles,” Pesaturo said.

Jacqueline Tempera can be reached at jacqueline.tempera@globe.com. Follow her on twitter @jacktemp