Operational Test of the Automatic Change-Over Function

TASK 22-60-00-710-002-A
Operational Test of the Automatic Change-Over Function

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

ZONE: 210

1. Reason for the Job
To do the check of the engagement discrete of the Yaw Damper, the Rudder Trim and the Rudder Travel Limiting. It comes from one FAC to the opposite and permits the change-over if a function disengages.
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 29-10-00-863-003-A	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01	Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 31-32-00-860-001-A	Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 34-10-00-860-004-A	Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-01	Automatic Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-02	Inertial Reference (IR) Alignment-Procedure to do a Check of the Links between each Flight Management and Guidance Computer (FMGC) and the three Air Data/Inertial Reference Units (ADIRUs)

3. Job Set-up
Subtask 22-60-00-860-052-A ** ON A/C NOT FOR ALL

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

Get the SYSTEM REPORT/TEST AFS page (Ref. AMM TASK 31-32-00-860-001).

(3) Do the EIS start procedure (Upper ECAM only) (Ref. AMM TASK 31-60-00-860-001).
(4) On the overhead panel, on the ADIRS CDU:

set the OFF/NAV/ATT switch related to IR3 to NAV and align the IR3, (Ref. AMM TASK 34-10-00-860-004)
make sure that the OFF and FAULT legends on the ADR3 pushbutton switch are off.

(5) On the overhead panel, on the FLT CTL panels 23VU and 24VU:

make sure that the FAC1 and the FAC2 pushbutton switches are pushed (in) (FAULT and OFF legends are off).

(6) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-10-00-863-003).

Subtask 22-60-00-860-052-C ** ON A/C NOT FOR ALL

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

Get the SYSTEM REPORT/TEST AFS page (Ref. AMM TASK 31-32-00-860-001).

(3) Do the EIS start procedure (Upper ECAM only) (Ref. AMM TASK 31-60-00-860-001).
(4) On the overhead panel, on the ADIRS MSU:

Set the OFF/NAV/ATT switch related to IR3 to NAV and align the IR3 (Ref. AMM TASK 34-10-00-860-004)
Make sure that the OFF and FAULT legends on the ADR3 pushbutton switch are off.

(5) On the overhead panel, on the FLT CTL panels 23VU and 24VU:

Make sure that the FAC1 and the FAC2 pushbutton switches are pushed (in) (FAULT and OFF legends are off).

(6) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-10-00-863-003).

Subtask 22-60-00-865-052-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/FAC1/28VDC	5CC1	B04
49VU	AUTO FLT/FAC1/26VAC	14CC1	B03
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	H10
49VU	AUTO FLT/FAC1/26VAC	14CC1	H09
** ON A/C ALL
121VU	AUTO FLT/FAC2/28VDC	5CC2	M19
121VU	AUTO FLT/FAC2/26VAC	14CC2	M18

4. Procedure
Subtask 22-60-00-710-052-A

A. Operational Test of the Automatic Change-Over Function

NOTE: Ignore the related warnings during the test.

ACTION	RESULT
1.On the overhead panel, on the FLT CTL panel 24VU:
Release the FAC 2 pushbutton switch.	On this pushbutton switch, the OFF legend comes on.
2.On the MCDU, on the AFS/MAIN MENU page:	On the MCDU:
Push the line key adjacent to the AFS TEST indication (Line key 5L).	The AFS TEST IS RUNNING indication comes into view. On the MCDU, at the end of the test, after approximately 40 seconds: The AFS TEST COMPLETED indication comes into view.
3.On the MCDU:	On the MCDU:
See if the FAC 1(2) is defective (PRESS LINE KEY indication in view).
If yes:
Push the line key adjacent to the defective FAC.	The AFS/TEST REPORT page comes into view. Make sure that these failures indications are not shown: FAC/YD ENGD CHG OV or FAC/RT ENGD CHG OV or FAC/RTL ENGD CHG OV. If they are shown, record these and continue the test. At the end of the test, do the related trouble shooting procedures.
	NOTE: If other FAC CFDS indications are shown do the related trouble shooting procedures of the FAC system before you continue the test.

4.On the MCDU: Push the line key adjacent to the RETURN indication until the AFS/MAIN MENU page comes into view.
5.On the FLT CTL panels 23VU and 24VU:
Release the FAC 1 pushbutton switch.	On this pushbutton switch, the OFF legend comes on.
Push the FAC 2 pushbutton switch.	On this pushbutton switch, the FAULT and OFF legends goes off. (refer to the note in step 3.).
6.Do the steps 2 to 3:
Use the indications between the parentheses.	You must get the same results step by step.
7.On the MCDU:	On the MCDU:
- Push the MCDU MENU mode key.	- The MENU page comes into view.
8.On the FLT CTL panel 24VU:
Release the FAC 2 pushbutton switch.	On this pushbutton switch, the OFF legend comes on.

5. Close-up
Subtask 22-60-00-860-053-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Depressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-10-00-864-003).
(2) On the overhead panel, on the FLT CTL panel 23VU:

push the FAC1 pushbutton switch, the FAULT and the OFF legends go off.

(3) On the overhead panel, on the FLT CTL panel 24VU:

push the FAC2 pushbutton switch, the FAULT and the OFF legends go off.

(4) On the overhead panel, on the ADIRS CDU, set the OFF/NAV/ATT selector switch related to IR3 to OFF.
(5) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(6) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 22-60-00-860-053-B ** ON A/C NOT FOR ALL

Push the FAC1 pushbutton switch, the FAULT and the OFF legends go off.

(3) On the overhead panel, on the FLT CTL panel 24VU:

Push the FAC2 pushbutton switch, the FAULT and the OFF legends go off.

(4) On the overhead panel, on the ADIRS MSU, set the OFF/NAV/ATT selector switch related to IR3 to OFF.
(5) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(6) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 08:26:13 UTC