What technical fault caused the Aerotrain tunnel drainage pump to fail?

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Technical Fault in Aerotrain Tunnel Drainage Pump Remains Unspecified

The specific technical fault that caused the Kuala Lumpur International Airport (KLIA) Aerotrain tunnel drainage pump to fail has not been detailed. The incident occurred on July 4th around 11 am following heavy rainfall, leading to water accumulation in the tunnel.
Drainage Pump Failure During Heavy Rainfall

The KLIA Aerotrain service experienced a temporary suspension on July 4th due to water buildup in its tunnel. This occurred after a period of heavy rainfall, which overwhelmed the drainage system's capacity. Malaysia Airports Holdings Bhd (MAHB) confirmed the event, stating that one of the tunnel's drainage pumps failed to activate automatically.
Safety Precautions and Service Resumption

As a safety precaution, Aerotrain operations were halted to allow technical teams to address the situation. Water was manually cleared from the tracks, and the service was able to resume at 12:15 pm once the route was confirmed to be safe for operations. Throughout the suspension, shuttle bus services to the satellite terminal continued without interruption, ensuring passenger movement was not significantly affected.
Ongoing Rectification Work

MAHB has indicated that work is underway to rectify the faulty pump. The aim of this ongoing maintenance is to prevent similar occurrences in the future, particularly during periods of adverse weather. The Aerotrain, which underwent a RM456 million upgrade and resumed service recently, connects the main terminal to the satellite terminal at KLIA.

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What technical fault caused the Aerotrain tunnel drainage pump to fail?

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