Before leaving a train stopped due to an emergency brake application, what must the operator do?

Before leaving a train that has been stopped due to an emergency brake application, applying enough handbrakes to prevent rolling is essential for safety. This action ensures that the train remains secure and does not inadvertently move, which could pose a risk to both the crew and any passengers on board.

The operator must take responsibility for ensuring that the train is stable before taking any further actions or leaving the train. The application of handbrakes acts as a precautionary measure to prevent the train from rolling away, especially if the brakes have been released or if there's a risk of the train being on an incline. This practice is crucial in maintaining control and ensuring the safety of personnel and passengers.

While other actions such as notifying the Control Center, checking for passengers, or securing doors are also important aspects of post-emergency procedures, the immediate priority must be to stabilize the train to avoid any potential accidents. This foundational step allows the operator to then address other important procedures safely.