In rolling stock fault procedures, what is the second action to take?

• A. Report to TC @ Metrol
• B. Must complete a TMM (Train Malfunction Message)
• C. TC advises fault category as per FMP
• D. Relay to TC @ Metrol

Answer: (B)

When a fault occurs in rolling stock, the steps are done in a specific order to keep everyone safe and get the train back on track. After you alert Traffic Control, the next essential action is to complete a Train Malfunction Message. This formal document captures all the key details of the fault—train identity, location, time, the symptoms observed, and any actions already taken. Having a standardized record ensures the control center and maintenance teams have accurate information to assess severity, coordinate a response, and track the issue.

The fault category, defined per the fault management plan, is then determined using the information in that record, so it relies on the TMM data. Other options—reporting to Traffic Control or routing the fault category—are part of the process but depend on the initial documentation provided by the Train Malfunction Message.