What must be done to ensure air pressure is charged in the train?

Ensuring that air pressure is charged in the train is a critical step for the safe and effective operation of the train systems. This process is facilitated by turning the Master Controller (MC) key to the RUN position while also ensuring that the Reverser switch is set to Forward. This combination of actions activates the necessary systems that contribute to building and maintaining appropriate air pressure levels within the train, which is essential for operating the brakes and other pneumatic systems effectively.

When the MC key is turned to the RUN position, it indicates that the train is ready to operate, enabling the compressors to begin functioning and charging the air reservoirs. The Reverser switch being set to Forward allows the train to engage its propulsion systems once ready, which further aids in ensuring that all components are aligned to build air pressure for operation. Without following these steps, the train may not achieve the adequate air pressure necessary for safe movement and control.