1-SWITCHING

Question 1

What computers feed data to the six display units?

Answer 1

• Three Display Management Computers (DMC)

Question 2

If there are any automatic functions of the DMCs in the event of a failure, explain the automatic logic.

Answer 2

• If DMC 1 fails (or DMC3 if “CAPT 3” was selected), DMC 2 automatically drives the ECAM.

Question 3

What are the indications on the DUs if a DMC has failed?

Answer 3

• “INVALID DATA” will be displayed in the respective EFIS/ECAM display unit.

Question 4

What happens when the upper DU fails?

Answer 4

• The E/WD automatically replaces the SD on the lower DU display.

Question 5

If both the E/WD and SD display units fail, how can the E/WD information be
displayed?

Answer 5

• By selecting the ECAM/ND XFR switch to CAPT or F/O