What should crew members do if a flat spot on a wheel exceeds certain dimensions?

When a flat spot on a wheel exceeds specified dimensions, it is crucial for crew members to ensure the safety of the train and its operation. Reporting the condition to the Dispatcher is critical because it initiates a review of the situation, allowing for proper assessment and action to be taken regarding the train's operation. The Dispatcher can then provide guidance, coordinate necessary maintenance, potentially arrange for inspection of the train, and determine if further action is needed to mitigate safety risks.

This is not only a matter of regulatory compliance but also an essential safety measure to prevent further damage to the train and the track, as well as to avoid hazardous situations that could arise from operating a train with compromised wheel integrity. The Dispatcher plays a vital role in managing these situations for the safety of all involved.