AIRBUS A320 (AVIONIC LEVEL 1)

31.INDICATING/RECORDING SYSTEM PRESENTATION (1)

ELECTRONIC INSTRUMENT SYSTEM

The Single Aisle aircraft cockpit instrument information is displayed on six display unit. These display unit are part of the Electronic Instrument System (EIS).

The EIS is sparated into two subsystem:

• Electronic Flight Instrument System (EFIS).
• Electronic Centralized Aircraft Monitoring (ECAM). 

The four EFIS displayed (2 for each flight crew member) give to the flight crew all basic flight parameter. The ECAM system give to the flight crew aircraft system displays, faults, checklist and the aircraft operational status.

ELECTRONIC INSTRUMENT SYSTEM

ELECTRONIC INSTRUMENT SYSTEM (continued)

ECAM

The System Data Aquisition Concentrators (SDACs) receive data from the A/C system and sends it to the Display Management Computers (DMCs) for display on the ECAM display units.

Note: DMC 1 supplies both ECAM display and DMC 2 is also a backup for ECAM dsplays.

 The DMCs acquire data and transmit it to the Display Units (DUs), which generate the image. Under normal circumstances:

• DMC 1 supplies both ECAM display,
• DMS 2 and 3 are available as a backup.

The Flight Warning Computers (FWCs), heart of the ECAM system, receive data from:

• the A/C system to generate red warning,
• the SDACs to generate amber caution.

The FWCs then supply:

• the DMCs for the display of alert messages,
• the attention getters,
• the loudspeakers with aural alert and synthetic voice messages.

ELECTRONIC INSTRUMENT SYSTEM - ECAM

ELECTRONIC INSTRUMENT SYSTEM (continued)

ECAM CONTROL AND INDICATING

The Engine/Warning Display (EWD) is divided into two main parts:

• the upper area is used to the display main engine parameters, the fuel on board (FOB) and the slat/flap position,
• the lower area is used for warning, caution and memo message

The System Display (SD) is divided into two areas:

• the upper part is used to display the various system pages, diagrams of the A/C system,
• the lower part is used to display permanent data.

below the ECAM display, on the center pedestal, there is the ECAM control panel. The two control knobs on the L/H side are used to adjust the brightness of the two ECAM screens and to turn them off. The P/Bs on the R/H side are mainly used to:

• display any of the system pages or the STATUS page,
• clear or recall a warning or caution message.

An A/C STATUS page may be also displayed on the SD to give an operational status of the A/C. When things are not normal the STATUS page displays:

• operational data on the L/H side,
• INOperative system on the R/H side.

In front of each pilot, there are two attention getters, a red Master Warning and an amber Master Caution. As a further means of getting the attention, there is a loudspeaker on each side of the cockpit for aural alerts and synthetic voice message.

AIRBUS TECHNICAL TRAINING

ELECTRONIC INSTRUMENT SYSTEM (continued)

EFIS (Electronic Flight Instrument System)

For the EFIS displays, data from the Air Data Initial Reference System (ADIRS) plus navigation data from Flight Management and Guidance System (FMGS) is fed directly to the DMCs.
The DMCs then process the data and generate the image dispaly. Under normal circumstances:

• DMC 1 supplies the CAPT EFIS dispalys,
• DMC 2 suplies the F/O EFIS displays,
• DMC3 is available as a backup.

ELECTRONIC INSTRUMENT SYSTEM - EFIS

ELECTRONIC INSTRUMENT SYSTEM (continued)

EFIS CONTROL AND INDICATING

Flight parameters are displayed on the Primary Flight Display (PFD) while navigation data is displayed on the Navigation Display (ND). Outboard of the PFDs, there are control knobs to adjust the brightness of the associated PFD and ND, and to turn the display off.
Two EFIS control panel are used to select what is displayed on the EFIS screens. The EFIS control panel are divided into two sections, one section associated with the PFD and the order one with ND.
Just below the ECAM screens, on the center pedestal, there is a switching panel with, on the right, 2 rotary selectors to restore data to the EFIS and ECAM display in abnormal operation.