On the 2nd of last month, when a train entered the Causeway Bay Station, the door fell off, and the service was suspended for nearly 3 hours during the rush hour, causing traffic congestion on Hong Kong Island.
The MTR released an investigation report today (27th), alleging that the cause of the incident was a billboard next to the track, and its shutter panel was not locked. It was noticed that the air suction generated when the train passed by caused the panel to sway downward and tilt outward. When the accident train entered the platform, the first pair of doors collided with the billboard panel and fell off.
The MTR pointed out that there are 8 billboards with the same design and 300 billboards with shutters on the whole line. Although they are different from the shutter panels in the accident, they will be equipped with equipment to ensure that they are locked.
The investigation report pointed out that the billboards involved were installed in 2005, and only 8 of them belonged to this design.
This billboard panel features two latches and two stops to prevent it from tipping out.
The investigation committee believes that before the accident, the deadbolt of one of the latches has slipped, while the other latch is defective. It is suspected that the contractor's personnel did not fully lock the panel, and the latch was defective and undetected. .
Therefore, when the train passes the track, the generated air suction will make the dough sway and the lock tongue will slide down.
The report pointed out that when both latches fail, the two stops of the panel should prevent the panel from tilting out, however, one of the stops of the panel involved is missing, and the other is missing a set screw, so there is no Prevents the panel from leaning out after frequent shaking.
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The investigation indicated that the contractor did not check for problems with latches and blocks, and did not carry out preventive maintenance. The contractor's procedures for replacing advertisements and personnel training need to be strengthened, and the MTR should also strengthen the maintenance system for trackside billboards. .
The report stated that 8 billboards of the same type have been permanently removed, and the replacement and locking procedures of the billboards have been strengthened. It is also expected that by the end of 2022, 300 billboards that use pull panels but not the same type of shutters will be installed. Remote monitoring sensor device.
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Engineer: Try not to rely on the number involved in the accident due to the MTR slamming the door │ Flying off the door and leaving the trackside Railway fans: Suspected that a foreign object collided when the train entered the station and the MTR slammed the door │ Passengers were late to announce no details. Dare to face the train door MTR slams the door│Wan Chai to Quarry Bay Station suspends the bus stop and forces workers to crowd Hong Kong Island, the MTR slams the door｜The train door at Causeway Bay Station falls off, suspected billboard collision service for 3 hours