Which specific track equipment did the defective axle box damage?

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Defective Axle Box Damaged Specific Track Equipment on East-West Line

A defective train axle box caused significant damage to specific track equipment on Singapore's East-West Line, leading to widespread service disruptions. The incident involved a first-generation train returning to the Ulu Pandan depot when its defective axle box caused a bogie's wheels to derail. This derailment resulted in the wheels striking crucial track components, including the third rail and point machines, which subsequently caused a power trip.
Damage to the Third Rail

The derailed wheels directly impacted the third rail, a critical component responsible for supplying power to the trains. This contact caused substantial damage, necessitating extensive repairs and contributing to the prolonged service suspension between Jurong East and Buona Vista stations. The damage to the third rail is a primary reason for the inability to restore power to the affected segment of the MRT network.
Impact on Point Machines

In addition to the third rail, the runaway bogie also collided with point machines. Point machines are electromechanical devices that control the setting of railway switches, enabling trains to change tracks. Damage to these machines compromises the safe operation of the railway system, as they are essential for directing train movements at junctions and crossings.
Cause of Derailment

The root cause identified for the derailment was a defective train axle box on one of the older, first-generation trains. This component failure led to the bogie's wheels losing contact with the running rail. The train was in the process of being withdrawn and was en route to the Ulu Pandan depot when the axle box defect manifested, triggering the chain of events that damaged the essential track infrastructure.

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Which specific track equipment did the defective axle box damage?

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