If instructed to turn off the air ventilation system due to smoke odor, what should the train operator do afterward?

In the event of being instructed to turn off the air ventilation system due to a smoke odor, the most appropriate course of action involves waiting until it is confirmed safe to turn the system back on. This ensures that any potential hazards, such as lingering smoke, can be adequately addressed before reintroducing air circulation, which could exacerbate the situation by distributing smoke or harmful particles throughout the train.

It's critical for the train operator to prioritize the safety of all individuals on board rather than prematurely restoring the airflow. Before transitioning back to air circulation, the operator should confirm via proper communication channels or upon receiving an all-clear message that it is safe to resume normal operation of the ventilation. This diligent approach helps maintain a safe environment for passengers and staff during an emergency situation.