If the ADG deploys will ACMP 3B be powered if the switch is off?

If the ADG deploys will ACMP 3B be powered if the switch is off?

• A. Yes, automatic and independent of switch position
• B. No, it requires the switch to be ON
• C. Only when bus power is available
• D. Only when hydraulic pressure exists

Answer: (A)

When a backup power source is active, systems can run independently of their normal controls. The Alternate Drive Generator (ADG) provides emergency power to essential loads automatically, without needing the civilian-style cockpit or system switches to be ON. ACMP 3B is wired to that emergency power path, so once the ADG deploys, ACMP 3B receives power from the emergency system even if its switch is OFF. This ensures critical environmental control can operate during power loss. The hydraulic pressure or the normal bus power state isn’t required for this emergency feed—the ADG’s connection to the essential power path handles it.

When a backup power source is active, systems can run independently of their normal controls. The Alternate Drive Generator (ADG) provides emergency power to essential loads automatically, without needing the civilian-style cockpit or system switches to be ON. ACMP 3B is wired to that emergency power path, so once the ADG deploys, ACMP 3B receives power from the emergency system even if its switch is OFF. This ensures critical environmental control can operate during power loss. The hydraulic pressure or the normal bus power state isn’t required for this emergency feed—the ADG’s connection to the essential power path handles it.