The City of Ottawa, Rideau Transit Group (RTG) and Alstom believe they've figured out the root cause of one of the Confederation Lines biggest remaining issues.
Maintenance done by RTG in the summer found cracks on four wheels of three separate trains. An investigation was then launched by the Transportation Safety Board of Canada (TSB) in July.
At Wednesday's Transit Commission meeting, Ottawa's director of transit operations identified the cause of the cracks.
"An improperly aligned screw," explained Troy Charter, adding that it created "undue stress on a part of the wheel, which then ultimately leads to this small crack that was observed,"
The city, RTG and Alstom conducted an investgation independent of the TSB, and found the issue.
Alstom suggested to the City of Ottawa that it would be best to completely replace the affected wheels and the city concurred.
Charter says that work will be completed in the first quarter of 2021.