After a failure of the upper DU (or if the upper DU brightness is turned off), the E/WD is displayed on the lower DU. How can a pilot display an SD page under this condition?

After a failure of the upper DU (or if the upper DU brightness is turned off), the E/WD is displayed on the lower DU. How can a pilot display an SD page under this condition?

• A. Press and hold the desired SD page button on the ECAM control panel, or press the ND XFR pushbutton.
• B. Use the MCDU radio nav page
• C. Turn the upper DU brightness to zero
• D. No action is required

Answer: (A)

When one display unit has failed or its brightness is off, you still access the system information by actively selecting the System Display (SD) pages on the remaining lower DU. The ECAM control panel provides two ways to do this. You can press and hold the SD page selector button that corresponds to the SD page you want to view, which will display that page on the active lower DU. Alternatively, you can press the ND XFR pushbutton to transfer the navigation display to the other DU; this transfer routes the ND content to the available screen and allows the SD page information to be shown there as well. Turning the upper DU off or brightness to zero won’t automatically bring up SD pages on the lower DU, and doing nothing won’t display them.

When one display unit has failed or its brightness is off, you still access the system information by actively selecting the System Display (SD) pages on the remaining lower DU. The ECAM control panel provides two ways to do this. You can press and hold the SD page selector button that corresponds to the SD page you want to view, which will display that page on the active lower DU. Alternatively, you can press the ND XFR pushbutton to transfer the navigation display to the other DU; this transfer routes the ND content to the available screen and allows the SD page information to be shown there as well. Turning the upper DU off or brightness to zero won’t automatically bring up SD pages on the lower DU, and doing nothing won’t display them.