The Toronto Star reported yesterday that TTC crews are replacing two parts on all 126 H6 subway cars after a car derailed last week on the Bloor-Danforth subway near Kennedy Station.

The TTC has redesigned a safety pin and a heavy metal link, both of which failed on the derailed car. They will replace these parts in all H6 cars during the next four months. H6s are less than one-third of the TTC’s subway car fleet.

A link on one car failed last week, allowing the car’s torque arm to push down on the safety pin and loosen it. The arm fell and dragged along the track bed, derailing the train, just as it left Kennedy Station around 1 a.m. on February 1.

Councillor Adam Giambrone, the chair of the Toronto Transit Commission, said that replacing the parts is precautionary and doesn’t indicate any systemic concern or any threat to public safety on the subway.