Concerning the optional data display pushbuttons, how many can be pushed at a time?

Concerning the optional data display pushbuttons, how many can be pushed at a time?

• A. Four
• B. Two
• C. Three
• D. One

Answer: (D)

The data display pushbuttons are page selectors for what the ECAM shows. The display system uses a single active selection for the data page, so only one button can be active at any moment. Pressing another button replaces the current selection, rather than allowing multiple pages to be shown at the same time. This keeps the information on the display unambiguous. If you consider both displays, each side operates independently, so you could have one page shown on the left and a different page on the right, but each side still has only one active selection.

The data display pushbuttons are page selectors for what the ECAM shows. The display system uses a single active selection for the data page, so only one button can be active at any moment. Pressing another button replaces the current selection, rather than allowing multiple pages to be shown at the same time. This keeps the information on the display unambiguous. If you consider both displays, each side operates independently, so you could have one page shown on the left and a different page on the right, but each side still has only one active selection.