What action is required after troubleshooting brake problems?

After troubleshooting brake problems, conducting a running brake test is essential to ensure that the repairs or adjustments have been effective. This test simulates actual operating conditions and allows for the verification of the brake system's functionality. The running brake test allows the engineer to confirm that the brakes respond correctly and safely in real-time scenarios, ensuring reliability before the train resumes operation.

This step is critical because it directly assesses the performance of the brakes on the move and helps to identify any lingering issues that may not have been evident during the troubleshooting phase. Safety is paramount in rail operations, and confirming that the braking system is fully operational minimizes risks to the crew, passengers, and cargo.

Though recording the issues, notifying the crew, and adjusting air pressure are important aspects of managing brake systems, they do not replace the necessity of validating the system's operational integrity with a running brake test after any troubleshooting has been completed.