What does the ADG Power supply?

• A. AC ESS BUS, Slats/Flaps 1/2 Speed, ACMP 3B (All Of The Above)
• B. AC ESS BUS Only
• C. Slats/Flaps 1/2 Speed Only
• D. ACMP 3B Only

Answer: (A)

ADG stands for Air Driven Generator, an emergency power source that automatically engages when the aircraft loses its engine-driven generators. Its role is to keep the most critical systems powered so you can continue to fly and land safely. In this setup, the ADG provides power to the AC Essential Bus, which feeds the essential avionics and flight controls; it also powers the Slats/Flaps at 1/2 speed, ensuring those wing devices can operate in an emergency mode; and it supplies ACMP 3B, one of the air conditioning compressors needed for environmental control and cooling. Since all of these systems need to remain powered during an electrical emergency, the ADG is designed to support them all, making “All of the Above” the best answer.