Metro Trains Melbourne investigating pantograph defects in High-Capacity Metro Trains (HCMT) causing disruptions
Consensus Summary
Metro Trains Melbourne is investigating a potential defect in the pantographs of its High-Capacity Metro Trains (HCMT), which operate through the $15 billion Metro Tunnel. The issue was highlighted after a February 3 incident near Armadale, where a pantograph fault caused an overhead wire to be pulled down, stranding 600 passengers for up to two hours without air-conditioning. Metro has since issued alerts to drivers warning of abnormal pantograph behavior, including excessive movement or arching, which could contribute to further entanglements. The HCMT fleet, built as part of a $2.3 billion public-private partnership with Downer, lacks driver cabin-side mirrors, making it impossible for operators to visually monitor pantographs, unlike older train models. Despite the upgrades, the Cranbourne/Pakenham and Sunbury linesāwhere HCMTs operateārecorded the highest cancellation rates (0.9%) in February and March, with Cranbourne at 0.7%. Metro confirmed only one pantograph-related incident this year but did not address a recent Clayton wire failure, which disrupted services for over 24 hours, though it was not attributed to a train fault.
ā Verified by 2+ sources
Key details reported by multiple sources:
- Metro Trains is investigating a potential defect in pantographs on its High-Capacity Metro Trains (HCMT) fleet, which operates exclusively through the $15 billion Metro Tunnel.
- On February 3, an HCMT pulled down an overhead wire near Armadale, leaving around 600 passengers stranded on two trains for up to two hours without air-conditioning on a 30-degree day.
- Metro identified the Armadale incident was caused by a pantograph fault, and a February 11 alert to drivers warned of 'abnormal pantograph behaviour,' including pantographs 'bobbing up and down' and 'excessively arching.'
- HCMTs lack driver cabin-side mirrors (unlike older models), relying instead on rear-facing CCTV cameras that do not capture the pantograph area, making it impossible for drivers to monitor overhead issues visually.
- The HCMT fleet operates on the Cranbourne/Pakenham and Sunbury lines, which form a single cross-city line connected via the Metro Tunnel, and were built starting in 2017 at a cost of $2.3 billion through a public-private partnership with Downer responsible for maintenance.
- Pakenham and Sunbury lines recorded the highest number of cancellations (0.9%) on Metroās electrified network in February and March, with Cranbourne at 0.7%.
- Metro Trains spokesperson stated: 'There has been one incident this year when a faulty pantograph on a HCMT has caused disruptions on our network.'
Points of Difference
Details reported by only one source:
- A major incident occurred last week (April 2026) when an overhead wire was brought down near Clayton, suspending Cranbourne and Pakenham line trains until around 4:30pm the following day, though Metro said this was not caused by a train fault.
Contradictions
Conflicting information between sources:
- No contradictions found between the two sources.
Source Articles
Metro, we have a problem: Tunnel trains being investigated over possible defect
Melbourneās newest train fleet ā which operates through the $15 billion Metro Tunnel ā is being investigated after an incident left hundreds of commuters stranded in carriages for hours.
Metro, we have a problem: Tunnel trains being investigated over possible defect
Melbourneās newest train fleet ā which operate through the $15 billion Metro Tunnel ā are being investigated after an incident left hundreds of commuters stranded in carriages for hours.