A320 Electronic Instrument System (EIS)

Question 1

Which screens are part of the EFIS (Electronic Flight Instrument System)?

Answer 1

Both PFD’s and both ND’s

Question 2

Which screens are the ECAM displays?

Answer 2

The two large center screens.

Upper screen: The E/WD or Engine/Warning display
Lower Screen: The SD or System display

Question 3

If the PFDU fails in flight, what would happen to the NDU?

Answer 3

All of the PFD information would automatically switch to the NDU as the PFD information has priority

Question 4

What would happen if you intentionally shut off the PFDU?

Answer 4

The PFD information would automatically switch to the NDU as PFD information has priority

Question 5

What would happen to the PFDU if the NDU fails?

Answer 5

Nothing would happen automatically. PFD information has priority. If you wanted to display the ND information on the PFDU you would need to push the PFD/ND XFR button to manually switch.

Question 6

How many DMC’s (Data management computers) are there?

Answer 6

3

Question 7

What screens can each DMC send data to?

Answer 7

Each DMC can simultaneously supply a PFD, ND, and both ECAM displays (E/WD and SD)

Question 8

Which screens does DMC 1 normally supply?

Answer 8

The captains PFD, ND, and both ECAM screens

Question 9

Which screens does DMC 2 normally provide?

Answer 9

It normally provides the first officers PFD and ND

Question 10

What screens does DMC 3 normally supply?

Answer 10

None. Normally DMC 3 serves only as a backup in case of failure.

Question 11

In the event of a failure of DMC 1 or 2, how can screens be recovered?

Answer 11

By using the EIS DMC NORM selector on the switching panel, and setting it to either captain or first officer side, whichever had failed.

Question 12

What would the PFD and ND say if a DMC failed?

Answer 12

“INVALID DATA” against a black background

Question 13

Which ECAM information always has priority, the E/WD or the SD?

Answer 13

The E/WD or Engine/Warning display

Question 14

What would happen to the SD or system display, if the E/WD display unit failed?

Answer 14

The E/WD information would automatically be transferred from the upper ECAM display or E/WD unit, to the lower ECAM display, as the E/WD information has priority. To display the SD information that was lost you could move the ECAM/ND XFR button on the switching panel panel to either captain or first officer. This would display the SD information on the respective persons NDU.

Question 15

What could you do to display the system display information on a temporary basis, if the upper ECAM screen had failed, and you didn’t use the ECAM/ND XFR switch?

Answer 15

You can press and hold the desired system page button, and that would temporarily display the particular system over the E/WD information

Question 16

What can be done to get ECAM information if both ECAM screens fail?

Answer 16

You can put the E/WD information on either the captain or first officers ND by using the ECAM/ND XFR switch and selecting to the side you wish it to be displayed. You can then get the system information by pressing the desired systems page, which would show up on the opposite side ND.