Movement of cover of detrainment switch could have led to Downtown Line disruption: SBS Transit
Downtown Line operator SBS Transit yesterday gave more details of how a child passenger could have activated a detrainment switch that triggered a power cut which disrupted the newly opened line on Friday.
A spokesman said preliminary findings showed that "the internal laminate of the metal cover which holds the detrainment door switch had debonded".
This, she said, caused the cover to be loosened.
"When the cover was moved, the detrainment switch was triggered," she said. As a safety precaution, power is cut off when the switch - which lowers a ramp for emergency evacuation - is activated.