Read the AVIONICS STATUS on the MCDU

TASK 31-32-00-740-009-A
Read the AVIONICS STATUS on the MCDU

ZONE: 210

1. Reason for the Job
To get the AVIONICS STATUS page on the ground. This page gives a real-time list of the units or systems for which:

there is an internal or external Class 1 or 2 fault (for example: AFS).
there is an internal or external Class 3 fault. The (CLASS 3) indication is shown near the name of the unit (for example: AEVC (CLASS 3)).
no valid data is available. For this, the indication is NO X DATA in which X is the name of the unit or system (for example: NO ATSU DATA).

2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)

3. Job Set-up
Subtask 31-32-00-861-081-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On the overhead panel, make sure that:
(a) The ON legend of the APU/MASTER SW, ENG/FADEC GND PWR/1 and ENG/FADEC GND PWR/2 pushbutton switches is on.
(b) The OFF or FAULT legend of the ELEC/BAT 1, ELEC/BAT 2, ADR 1, ADR 2 and ADR 3 pushbutton switches is not on.
(c) The OFF/NAV/ATT selector switches related to the IR 1, IR 2 and IR 3 are at NAV.

Subtask 31-32-00-865-087-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/MCDU/1	11CA1	B01
** ON A/C NOT FOR ALL
49VU	AUTO FLT/MCDU/1	11CA1	H07
** ON A/C NOT FOR ALL
121VU	CFDS/CFDIU/SPLY	2TW	J18
121VU	CFDS/CFDIU/BACK/UP	8TW	J17
** ON A/C ALL
121VU	AUTO FLT/MCDU/2	11CA2	N20
** ON A/C NOT FOR ALL
121VU	CFDS/CFDIU/SPLY	2TW	J41
121VU	CFDS/CFDIU/BACK/UP	8TW	J40

4. Procedure
Subtask 31-32-00-740-058-A

A. Do this procedure:

ACTION	RESULT
1.Adjust the brightness of the MCDU screen:	The MCDU is on.
2.On the MCDU: push the MCDU MENU mode key.	On the MCDU: the MCDU MENU page comes into view.
3.On the MCDU: push the line key adjacent to the CFDS indication.	On the MCDU: the CFDS MENU page comes into view.
4.On the MCDU: push the line key adjacent to the AVIONICS STATUS indication.	On the MCDU: the AVIONICS STATUS page comes into view.

5. Close-up
Subtask 31-32-00-860-117-A

A. Put the aircraft back to its initial configuration.
(1) On the MCDU, push the line key adjacent to the RETURN indication until the CFDS MENU page comes into view.
(2) Fully decrease the brightness of the MCDU screen (display off).
(3) On the overhead panel:
(a) set the OFF/NAV/ATT selector switches related to the IR 1, IR 2 and IR 3 to OFF.
(b) Set the APU/MASTER SW, ELEC/BAT 1, ELEC/BAT 2, ADR 1, ADR 2, ADR 3, ENG/FADEC GND PWR/1 and ENG/FADEC GND PWR/2 pushbutton switches to OFF.
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 08:28:58 UTC