Which two systems use collared circuit breakers to make them easier to locate?

• A. The stick pusher and the EEC (electric engine controller).
• B. The Pusher System and the Main Bus.
• C. The Avionics and the Flight Deck Console.
• D. The Hydraulics and the Environmental Control System.

Answer: (A)

Collared circuit breakers are used to quickly identify breakers that control very important systems, giving pilots and maintainers an easy visual and tactile cue to the correct handle in stressful situations. In the PC-12 NGX, the stick pusher and the electric engine controller are the two systems designated with collared breakers because they are safety‑critical and require fast, unambiguous access for resets or isolation. The stick pusher is tied to stall protection, and the engine controller governs engine operation; misidentification of their breakers could lead to delays or errors in an emergency. Having a collar on these breakers makes them stand out on the panel, enabling rapid location even in low light or while wearing gloves. The other groupings don’t feature collared breakers as a standard identification method, so they don’t provide the same quick-locator benefit.