When will the ADG deploy?

When will the ADG deploy?

• A. Weight off wheels and loss of all AC power
• B. Only when commanded by the crew
• C. After engine start
• D. When the APU is running

Answer: (A)

The main idea is that the Air Driven Generator provides emergency electrical power when the aircraft loses all primary AC power. It is designed to come online automatically under a specific emergency condition so essential systems stay powered. It will deploy when there is a loss of all AC power and the airplane is not resting on its landing gear (weight off wheels). This means if you’re in flight or otherwise not on the ground and the main power sources fail, the ADG automatically engages to keep critical avionics, control systems, and essential lights powered. It isn’t activated just because the APU is running or simply after engine start, and it isn’t something you typically deploy manually during normal operations.

The main idea is that the Air Driven Generator provides emergency electrical power when the aircraft loses all primary AC power. It is designed to come online automatically under a specific emergency condition so essential systems stay powered. It will deploy when there is a loss of all AC power and the airplane is not resting on its landing gear (weight off wheels). This means if you’re in flight or otherwise not on the ground and the main power sources fail, the ADG automatically engages to keep critical avionics, control systems, and essential lights powered. It isn’t activated just because the APU is running or simply after engine start, and it isn’t something you typically deploy manually during normal operations.