The Land Transport Authority (LTA) and SBS Transit (SBST) carried out an investigation into the faulty platform screen door at Sixth Avenue Station on the Downtown Line (DTL).
Investigations found that the bolt on the fastener, which secures the affected platform screen door to the guide rail, had loosened over time, causing the door to be misaligned and coming into contact with the side of an approaching train. No commuters were hurt in the incident.
The platform screen doors at Sixth Avenue station were last checked by SBST in August 2016 as part of theroutine maintenance, and none were found to be faulty. However, following the incident, all DTL platform screen doors, including bolts and securing mechanisms underwent further extensive inspections. All the platform screen doors were found to be functioning normally. Platform screen doors on the other rail lines were also inspected, and found to be secure and in good working condition.
LTA and SBST have also approached the original equipment manufacturers of the DTL doors to enhance the design of the platform screen door fasteners. A self-locking nut and a retaining pin will be added as an additional measure to for securing the fastener to the guiding rail. The enhancement works to the doors are expected to be completed in the next two weeks. All platform screen doors for the upcoming DTL3 will also use this enhanced fastener design.
Going forward, more specific checks on all DTL platform screen doors will be done as part of routine maintenance.
The platform screen door design on the other existing rail lines will be retained as they are of a different design from the doors on DTL, and have been operating well for some years without any report of loosened mechanical parts, said a statement from LTA and SBST.