What is the first action to restore normal power after an ADG deployment if a generator returns?

What is the first action to restore normal power after an ADG deployment if a generator returns?

• A. Stow ADG handle
• B. Reset the cockpit circuit breakers
• C. Turn off the battery switch
• D. Engage the standby generator

Answer: (A)

When the ADG has deployed to keep essential systems powered, the first step once a generator returns is to stow the ADG handle. Stowing it disconnects the ADG from the electrical system, allowing power to flow back through the normal sources and restoring normal electrical configuration. Leaving the ADG deployed would keep the backup source active and can prevent the systems from fully re-seating on the main generators. The other actions aren’t the immediate first step after a generator returns: turning off the battery switch would remove power from essential systems, which isn’t desirable; resetting cockpit circuit breakers may be needed later if a specific bus fault remains, but not as the initial move; engaging the standby generator is used when the main sources have failed, not when a returned generator is available.

When the ADG has deployed to keep essential systems powered, the first step once a generator returns is to stow the ADG handle. Stowing it disconnects the ADG from the electrical system, allowing power to flow back through the normal sources and restoring normal electrical configuration. Leaving the ADG deployed would keep the backup source active and can prevent the systems from fully re-seating on the main generators.

The other actions aren’t the immediate first step after a generator returns: turning off the battery switch would remove power from essential systems, which isn’t desirable; resetting cockpit circuit breakers may be needed later if a specific bus fault remains, but not as the initial move; engaging the standby generator is used when the main sources have failed, not when a returned generator is available.