OC Transpo officials have announced that a comprehensive strategy to restore full service on O-Train Line 1 remains unfinalized, as they continue to await the repair of all train cars. The transit authority has not provided a specific timeline for when this plan will be completed, leaving commuters in uncertainty.
Technical Details and Fleet Management
In a memo dated March 20, interim general manager Troy Charter revealed that OC Transpo staff are collaborating with Rideau Transit Group (RTG) to finalize the technical aspects of a containment plan. This plan aims to eliminate the 100,000-kilometre threshold that currently requires trains to be removed from service for inspection. A technical briefing is promised once this plan is finalized.
Charter emphasized that efforts are ongoing to increase the train fleet to sufficient numbers, which is crucial for proceeding with the trial running phase of the East Extension project. "Our first priority remains the safe restoration of Line 1 capacity," the memo stated, highlighting the focus on safety and reliability.
Root Cause of Service Disruptions
The service issues stem from a spalling problem discovered within the cartridge bearing assemblies in January. Spalling, which involves the flaking of surface material, was identified during inspections related to a separate fretting issue that caused a derailment in 2021. This discovery led OC Transpo to pull 41 train cars for inspection and repairs, leaving only 18 in service initially.
To manage service demand with limited resources, OC Transpo operated single-car trains every three to four minutes during peak periods. Since then, three additional cars have rejoined the fleet, bringing the total available to 21. However, this number has remained unchanged since mid-January, indicating slow progress in repairs.
Challenges in Repair Timelines
Originally, maintenance crews estimated they could repair one train car every five days. This timeline has been extended due to the discovery of additional maintenance requirements. Charter explained during a transit committee meeting on March 12 that managing both the kilometres on vehicles and the supply of cartridge bearing assemblies has complicated efforts to increase the fleet size.
"We’re maintaining the number of trains that we have available for service at 21 because we’re trying to manage both the kilometres on the vehicles as well as the supply of the cartridge bearing assemblies," Charter said, underscoring the logistical hurdles.
Impact on Other Lines and Bus Services
It is important to note that Line 2 and Line 4 of the LRT system are not affected by the spalling inspections and repairs, and they continue to operate on normal schedules. Meanwhile, bus services have faced their own challenges, with a freezing rain event on March 11 increasing the weekly average of undelivered bus trips to 4.4 percent for the second week of the month, according to OC Transpo data.
As OC Transpo shifts its focus from incremental increases in available train cars to a strategy aimed at restoring the entire fleet, commuters await further updates on when full service on Line 1 will be reinstated.
