Procedure for the Class 3 Fault Reading

TASK 31-32-00-869-002-A
Procedure for the Class 3 Fault Reading

NOTE: You can ignore all the ECAM warnings while the computer is in menu mode.

ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 313000-01
READ CENTRALIZED FAULT DISPLAY SYSTEM (CFDS) FOR CLASS 3 FAULTS
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)
TASK 31-32-00-740-009-A	Read the AVIONICS STATUS on the MCDU
TASK 34-10-00-860-002-A	ADIRS Start Procedure
TASK 34-10-00-860-005-A	ADIRS Stop Procedure

3. Job Set-up
Subtask 31-32-00-860-118-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the center pedestal, on RMP1 and RMP2:

Set the ON/OFF selector switch to ON.

(3) On the overhead panel, on RMP3 (if installed):

Set the ON/OFF selector switch to ON.

(4) On the overhead panel, on the ENG section of panel 50VU:

Push the FADEC GND PWR/1 and FADEC GND PWR/2 pushbutton switches (the ON legends come on).

(5) Do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002).
(6) Read the AVIONICS STATUS on the MCDU (Ref. AMM TASK 31-32-00-740-009).

Subtask 31-32-00-865-052-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	PTR/SPLY	6TW	J21
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	PTR/SPLY	6TW	J44
121VU	CFDS/CFDIU/SPLY	2TW	J41
121VU	CFDS/CFDIU/BACK/UP	8TW	J40

4. Procedure
Subtask 31-32-00-860-095-D

A. Procedure for the Class 3 Fault Reading

ACTION	RESULT
1.On the MCDU, on the AVIONICS STATUS page: Make sure that the NO_LRU NAME DATA indication is not shown.
2.Push the line select key adjacent to the PRINT indication. NOTE: The indication (CLASS 3) which follows the name of a system has a class 3 fault.	The printer prints the related page.
3.Push the line select key adjacent to the RETURN indication.	The CFDS MENU page comes into view.
4.Push the line select key adjacent to the SYSTEM REPORT/TEST indication.	The SYSTEM REPORT/TEST page comes into view.
5.To select the system with a class 3 fault: Push the line select key adjacent to the name of the system (for some systems, use the right arrow key to go to the next page).	The page of the system comes into view.
6.Push the line select key adjacent to the CLASS 3 FAULTS or the SCHEDULED MAINT REPORT indication. For the engines, if the two indications are shown, push the line select key adjacent to the CLASS 3 FAULT indication. If only the SCHEDULED MAINT REPORT indication is shown, push the line select key adjacent to the SCHEDULED MAINT REPORT indication. NOTE: In the SMR menu, the class 3 faults are identified by an asterisk.	The page with the list of the class 3 faults related to the system comes into view.
7.Read only the class 3 faults: With no date (for a type-2 system BITE) or, With the date of the last leg (for a type-1 system BITE). For the other dates, ignore the faults because they are stopped or corrected. NOTE: We recommended to correct all class 3 faults before or at the subsequent C-Check (refer to the related troubleshooting procedure). NOTE: For a flight which includes two dates, you find the class 3 faults with a date different from the date of the LAST LEG REPORT (the LAST LEG REPORT always has the date of the departure).
8.Push the line select key adjacent to the RETURN indication until the SYSTEM REPORT/TEST page comes into view.
9.Do steps 5 to 8 for all the systems with the (CLASS 3) indication on the AVIONICS STATUS page.

5. Close-up
Subtask 31-32-00-860-055-A

A. Put the aircraft back to its initial configuration.
(1) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.

(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).

(3) On the overhead panel, on the ENG section of panel 50VU:

Release the FADEC GND PWR/1 pushbutton switch (the ON legend goes off).

(4) On the overhead panel, on the ENG section of panel 50VU:

Release the FADEC GND PWR/2 pushbutton switch (the ON legend goes off).

(5) On the center pedestal, on RMP1 and RMP2:

Set the ON/OFF selector switch to OFF.

(6) On the overhead panel, on RMP3 (if installed):

Set the ON/OFF selector switch to OFF.

(7) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 06:56:35 UTC