This past weekend, Metro's railcar maintenance and engineering staff completed inspections of door operations and components on all 100 4000-series cars. The inspections revealed no evidence of a systemic or emergent safety hazard. However, some of the door components were found to be at a low level of acceptable tolerance in terms of meeting Metro standards, and mechanics will need to make adjustments to the door equipment to keep all components in good working order. This work will help enhance safety, ensure the reliability of door operations and reduce offloads.

The door maintenance work will require more time with the cars than is available during overnight hours and includes adjusting tension on the doors, switches, and checking all screw mechanisms, as well as a more robust inspection of all components. 

Over the next month, Metro will gradually return 4000-series cars to passenger service as the maintenance work is completed. This means that mostly 6-car trains will continue to operate in the coming days but will gradually be expanded as more 4000-series cars return to service. 

Metro greatly appreciates our riders' patience and understanding as this necessary work is undertaken to ensure safe and reliable train operations.