Which action ensures the ECAM SD information can be moved to the ND in the event of a DU failure?

Which action ensures the ECAM SD information can be moved to the ND in the event of a DU failure?

• A. Movement of the ECAM/ND XFR switch
• B. Pressing the ECAM E/WD button
• C. Rebooting the ECAM system
• D. Power cycling the ND

Answer: (A)

Routing ECAM SD data to the Navigation Display is done by moving the ECAM/ND transfer switch. This switch re-routes the ECAM system information so it can be shown on the ND even if one of the Display Units has failed, allowing continuous access to warnings and system status from the remaining display. Other actions wouldn’t move ECAM data to the ND in a DU failure: the ECAM E/WD button only affects what's shown on the ECAM unit itself, rebooting the ECAM system restarts it without re-routing the display, and power cycling the ND doesn’t establish the necessary ECAM→ND link.

Routing ECAM SD data to the Navigation Display is done by moving the ECAM/ND transfer switch. This switch re-routes the ECAM system information so it can be shown on the ND even if one of the Display Units has failed, allowing continuous access to warnings and system status from the remaining display. Other actions wouldn’t move ECAM data to the ND in a DU failure: the ECAM E/WD button only affects what's shown on the ECAM unit itself, rebooting the ECAM system restarts it without re-routing the display, and power cycling the ND doesn’t establish the necessary ECAM→ND link.