How would you select the other auto pressure controller in flight? How would you select the Manual controller?

• A. Press the PRESS CONT switchlight once to change active controllers; Press it twice to select the manual controller.
• B. Press the PRESS CONT switchlight twice to change active controllers; Press it once to select the manual controller.
• C. Press the PRESS CONT switchlight twice to change active controllers. Press it once to select the manual controller.
• D. Press the PRESS CONT switchlight three times to cycle through options.

Answer: (C)

The switch that says PRESS CONT is used to choose how the system is driven: you can cycle between the available auto pressure controllers, or you can hand over control to the manual controller. To switch to the other auto pressure controller, press the PRESS CONT switchlight twice. This cycles to the other automatic controller that can drive the system. To take manual control, press it once to select the manual controller. This sequence lets you first choose the desired automatic source, then hand control when needed. The other pressing patterns don’t follow this operational method, which is why they’re not correct.