What should be done if a brake pipe breaks during operation?

When a brake pipe breaks during operation, the immediate priority is to ensure the safety of the train and its passengers. Notifying the crew and initiating emergency stopping procedures is essential because a brake pipe failure can lead to a rapid loss of braking force. This situation creates a risk of loss of control over the train, potentially resulting in an accident.

Emergency stopping procedures are designed to bring the train to a halt safely and swiftly in critical situations like a brake pipe break. These procedures are pre-established protocols that focus on managing the situation effectively, reducing speed, and ensuring that the train stops without further incident.

Attempting to repair the brake pipe while the train is moving poses significant risks, as it could lead to additional hazards and complications. Continuing at a reduced speed does not address the underlying issue of brake failure and could compromise safety. Switching to an alternate air system might not be feasible or effective, depending on the circumstances of the failure and the type of train system in use. Thus, the most responsible and effective action in the event of a brake pipe break is to notify the crew and follow emergency protocols.