What does the ADG power?

• A. ADG Bus, AC BUS, Slats/Flaps (Half/Speed), ACMP 3B Pump and Stab Trim Channel 2
• B. ADG Bus only
• C. The hydraulic system
• D. The cabin air system

Answer: (A)

The thing being tested is what the Air Driven Generator (ADG) can power in an electrical emergency. When main power is lost, the ADG supplies energy to the ADG bus and the essential AC bus, keeping critical functions alive. It isn’t limited to just one bus; it extends to components that must remain operable for safe continued flight. Specifically, it powers the Slats/Flaps in the alternate mode (Half/Speed), the hydraulic pump for system 3B (ACMP 3B), and Stabilizer Trim Channel 2. This set of systems is chosen because maintaining wing configuration, some hydraulic actuation, and stabilizer trim is crucial when primary electrical power is unavailable.

The other options don’t fit because the ADG isn’t limited to a single bus, nor does it power the entire hydraulic system or the cabin air system.