Final answer:
With the ADC switch in NORM, the pilot and copilot displays receive data from their respective primary Air Data Computers (ADCs), which provide essential flight information such as airspeed and altitude.
Step-by-step explanation:
With the ADC switch in NORM (normal), the pilot and copilot displays receive data from the primary Air Data Computer (ADC). The ADC is responsible for providing critical flight data such as airspeed, altitude, vertical speed, and outside air temperature, which are essential for flight operation and navigation. In a typical dual ADC aircraft system, each pilot has a dedicated ADC. When the switch is set to NORM, it ensures that each pilot's display is receiving information from their respective primary ADC unless a failure prompts a switch to the alternate system.