What must be done after correcting air leakage on a train?

After correcting air leakage on a train, it is essential to conduct a re-inspection. This step ensures that the repairs were effective and that no additional issues have arisen. A re-inspection allows for a thorough examination of the air brake system to confirm that it is functioning properly and that there are no further leaks. This practice is critical for maintaining safety standards and operational reliability.

While resetting the air charge is related to air brake operations, it typically follows the confirmation that the system is leak-free; therefore, it is part of the process but not the primary action taken immediately after addressing leakage. Other suggestions, such as wiping the train clean or demoting it, do not directly pertain to the immediate safety and operational checks required after a leak repair. Thus, re-inspection is the most appropriate and safety-critical action following the correction of air leakage.