Metro Trains Melbourne standards and procedures did not specifically address requirements associated with fuse removal and securement in safety critical scenarios.
The safety actions taken by Metro Trains Melbourne should reduce the risk associated with this safety issue. The safety issue is categorised as partially addressed due to MTM’s ongoing participation in the further development of signalling standards, competency frameworks and training.
Metro Trains Melbourne (MTM) advised that it will publish an Engineering Advice Note (EAN) that draws attention to the findings of this ATSB report, and the requirements of MTM’s specifications and how they should be applied to mitigate against a similar occurrence. This advice will specifically draw attention to the requirements to comply with design notes, including evidence by way of check marks on test copies, and practical examples of how fuse holders should be secured.
MTM is also an active participant and funding contributor to the state‑led Signalling Strategy Taskforce (SST). MTM advised that the SST was established to, amongst other things, reform the signalling standards for use across Victoria; modernise the competency management system and align it to the National competency management framework; and, develop and deliver a suite of design and testing training material as the basis for delivering consistent practice within Victoria along with providing a defined basis for performing competency assessment, including for the periodic revalidation of competency.
MTM advised that it would ensure that the requirements associated with fuse removal and securement in safety critical applications are appropriately incorporated into applicable standards, procedures and training. Rollout of training courses to industry is scheduled to commence in 2025.