What actions should be taken if a train encounters a mechanical failure?

When a train encounters a mechanical failure, the first priority is safety and proper communication. Notifying the engineer is crucial, as they have the training and authority to assess the situation effectively. Once notified, the next step is to assess the nature of the mechanical failure to determine the appropriate response. Following established emergency protocols ensures that all actions taken are in line with safety regulations and best practices for handling such situations.

This option emphasizes a systematic response that prioritizes safety, coordination, and adherence to protocol, which are essential in emergency management. Other choices do not align with these safety practices; attempting to fix the issue independently could lead to further complications or safety risks, evacuating passengers immediately without assessment could cause panic and disorganization, and continuing operations without addressing the mechanical failure could pose significant risks to passenger safety and operations.