KLIA AEROTRAIN AND OPERATIONAL SERVICE AVAILABILITY

SEPANG -- Malaysia Airports acknowledges the public’s concerns regarding the KLIA Aerotrain service and the technical issues that have affected its operations. We take these matters seriously and remain fully committed to delivering safe, reliable, and efficient services to all our passengers.

Managing Director, Dato’ Mohd Izani Ghani said, “We are equally disappointed, considering that the Aerotrain had just undergone a scheduled 2-week maintenance involving all contractors. I have been made to understand by the Aerotrain’s Project Coordination Lead, Alstom, that the cause of yesterday's incident was a dislodged Current Collector Device (CCD) that triggered a loss of power to the train.”

“In our ongoing discussions, Alstom has agreed to provide a more detailed explanation regarding the dislodged CCD. I have also requested for Alstom to thoroughly investigate and vigilantly work with our own engineering teams during the daily train maintenance hours to identify potential risks.”

The KLIA Aerotrain’s performance is continuously measured according to several indicators, including: 

 ● Operational Service Availability (time in service over planned time in service): 
    On a cumulative monthly basis, in its first month of service (July 2025), the Aerotrain recorded an overall OSA of 97.27%. The OSA for August improved significantly to 99.93%. 

 ● Ridership Growth: 
    Passenger numbers transferred between the main and satellite terminals via the Aerotrain have shown an upward trend, with 1.4 million passengers in July, and 1.7 million passengers in August. 

 ● Train Mileage Performance: 
    Cumulatively, the three Aerotrains have logged an average of 10,586 km in July and 10,723km in August. Two trains have     demonstrated increased mileage in the last week of August. For example, (during period 21 August – 27 August), Train logged 2,530 km (up from 1,765 km in previous week), and Train 2 logged 2,373 km (up from 2,035 km), indicating improved reliability and utilisation.

“These achievements underscore our continuous efforts to enhance system performance and passenger experience. However, as the airport operator, we expect better. We will continue to work with Alstom to implement comprehensive measures, including ongoing software updates and system enhancements, to ensure that such disruptions are minimised moving forward,” added Dato’ Mohd Izani.

“I have also requested for an exhaustive remediation plan to minimise future occurrences. While there were no disruptions to airport operations and passenger transfers between the terminals during the incident, our aim is to get ahead of operational issues.”

“We deeply appreciate the patience and understanding of our passengers and stakeholders as we work diligently to deliver on our commitment to world-class service standards in all aspects of airport operations,” he concluded.

“Alstom acknowledges the recent service interruption involving one of the KLIA Aerotrain units on 3rd Sept 2025. We are working closely with our supplier to support a thorough investigation into the root cause of the incident, which has been preliminarily attributed to a Current Collector Device (CCD),” said Mr. Sim Ooi Kok, Country Managing Director, Malaysia, Alstom.

“This incident is not reflective of the overall performance of the newly relaunched Aerotrain system. As a precautionary and corrective measure to reinforce system reliability, all CCDs will be inspected daily to detect any signs of abnormality.”

“Alstom is dedicated to providing safe, reliable APM systems and continues to support the Malaysia Airports’ team to ensure uninterrupted service,” he added.