BREAKING: Problematic LRT train parts still pose 'risk to safety,' TSB says ottnews
A window is broken and the wheels of a segment of an OC Transpo O-Train is seen west of Tremblay LRT Station in Ottawa on Monday, Sept. 20, 2021 after it derailed on Sunday.
On Wednesday, OC Transpo released the Rail Safety Advisory sent by the Transportation Safety Board on Feb. 3 regarding the vehicle axle bearing assemblies on O-Train vehicles. The TSB looked into the two derailments in August and September 2021, and the issue discovered with the wheel axle hub on a train last July.
The Aug. 8, 2021 derailment at Tunney's Pasture Station was due to an "undetected catastrophic roller bearing failure" in the axle bearing assembly, the TSB said. The Transportation Safety Board examined three cartridge assemblies from the failed axle wheel hub on the train that reported the issues last July.
"Since OLRT LRVs have no on-board automated cartridge assembly heat detection system, the free play inspections continue to be necessary," the TSB said. "However, this additional maintenance task is labour intensive and time consuming for a component that should last over 1.2 million km."
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