What action is required for the brake rigging during air brake tests?

For air brake tests, verifying that the brake rigging is properly secured and not binding is essential for ensuring safe and effective brake performance. This ensures that all components of the air brake system can function correctly without obstruction. If the brake rigging is loose, it could lead to malfunction during operation, compromising the train's ability to stop effectively. Additionally, any binding could hinder the system's ability to respond as intended, leading to longer stopping distances or other safety hazards.

In maintenance and operational safety protocols, securing the brake rigging is a critical step that directly impacts the reliability of the braking system. By confirming that the rigging is not only secured but also free from any binding issues, you ensure that the air brakes will respond correctly in emergencies, promoting overall safety for the train and its cargo.