If the engine whistle fails en route, what is the first action taken?

When the engine whistle fails while the train is en route, the appropriate first action is to continue movement and ring the engine bell continuously. This response is grounded in safety protocols, as the bell serves as an auditory warning signal to alert pedestrians and other rail personnel to the train's presence.

Continuously ringing the bell is crucial because it helps maintain caution and signals to others that the train is approaching, thereby mitigating the risk of accidents that could arise from the absence of the whistle. Stopping the train immediately could pose a safety hazard, especially in situations where the train could obstruct other tracks or create danger on the line. Calling for maintenance crew assistance or reporting to the dispatcher are important actions, but they would typically follow the immediate safety measures taken while the train is still in motion. Therefore, utilizing the bell provides a practical and effective way to communicate the train's presence until further actions can be coordinated.