Which statement best describes the standby position on the Display/Avionics fan control panel?

• A. It enables standby conditioning to cockpit displays
• B. It disables all display cooling
• C. It activates the main pack cooling
• D. It selects external air

Answer: (A)

Standby conditioning to cockpit displays means the cooling air path is directed to keep the cockpit displays within their safe operating temperature when normal cooling paths aren’t active. This ensures the displays stay readable and protected during startup or in fault conditions, rather than leaving them uncooled or relying on other cooling routes.

This setting does not shut off display cooling, move cooling to the main packs, or switch to external air—the standby position specifically provides conditioned air to the cockpit displays so they remain properly cooled and functional.