How can you isolate all engine bleed air in the Falcon 7X?

To isolate all engine bleed air in the Falcon 7X, the correct action is to turn the bleed switch to the OFF position for the specific engine. This action directly stops the flow of bleed air from the engine, effectively isolating it from the aircraft's pneumatic systems.

When the bleed switch is turned OFF, the aircraft's systems will no longer draw any bleed air from that engine, which is crucial for maintaining control of pressurization and environmental systems. This procedure is particularly important during specific phases of flight or in the event of a malfunction, where precise management of air supply is necessary.

Other potential methods, such as shutting down the engine, could stop the bleed air supply but would also result in the loss of thrust and more significant operational impacts. Activating the bleed air indicator simply provides information about the bleed air system rather than managing it, and setting the environmental control system to manual only alters how the crew manages cabin temperature and airflow, without necessarily isolating bleed air.