What action should be taken in the event of an air system failure while in operation?

In the event of an air system failure while in operation, the appropriate action is to implement emergency procedures and activate the emergency brakes. This is critical because an air system failure can lead to a loss of control over the train's braking capabilities, which poses a serious safety risk. Activating the emergency brakes ensures that the train can slow down and come to a stop safely, thereby protecting both passengers and crew.

Emergency procedures provide a systematic approach to handle such situations, prioritizing safety above all. By following these protocols, the operator can minimize the potential for accidents and ensure that the train remains as safe as possible during a critical failure. Promptly activating the emergency brakes is a necessary measure to reduce speed rapidly and prevent further complications that could arise from an unrecoverable situation.