Functional Test of the FUEL AUTO TRANSFER FAULT of the Main Transfer System

TASK 28-26-00-720-001-A
Functional Test of the FUEL AUTO TRANSFER FAULT of the Main Transfer System

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
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 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
Cockpit Fuel-Control Switches and Indications ** ON A/C NOT FOR ALL
Cockpit Fuel-Control Switches and Indications ** ON A/C NOT FOR ALL
Cockpit Fuel-Control Switches and Indications ** ON A/C NOT FOR ALL
Cockpit Fuel-Control Switches and Indications ** ON A/C NOT FOR ALL
Cockpit Fuel-Control Switches and Indications ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-26-00-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(2) Put the SAFETY BARRIER(S) in position.
(3) Put a WARNING NOTICE(S) in position to tell persons not to operate the flight controls.

Subtask 28-26-00-860-052-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration

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.

(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (ECAM only) (Ref. AMM TASK 31-60-00-860-001).
(3) On the ECAM control panel (CP), push (in) the FUEL push icon switch.
(4) Make sure that the FUEL page shows on the ECAM lower display unit (DU).
(5) Open the access door 192MB.
(6) Refuel (Ref. AMM TASK 12-11-28-650-003), defuel (Ref. AMM TASK 28-25-00-650-001) or transfer fuel (Ref. AMM TASK 28-25-00-869-001) to get these fuel levels:

wing tanks less than 5000 kg (11023 lb)
center tank more than 250 kg (551 lb).

(7) On the refuel/defuel panel 800VU, lift the guard and put the MODE SELECT switch to the REFUEL position.
(8) On the ECAM upper DU, make sure that no FUEL caution messages are shown.
(9) On the panel 40VU, make sure that these pushbutton switches (P/BSWs) are set as follows:

CTR TK MODE SEL released out, MAN
L TK PUMPS 1 and 2 released out, OFF
R TK PUMPS 1 and 2 released out, OFF
CTR TK L XFR and CTR TK R XFR released out, OFF
X FEED released out, all lights off.

4. Procedure

WARNING: WHEN YOU OPERATE THE FUEL PUMPS DURING A MAINTENANCE PROCEDURE, A MAINTENANCE PERSON MUST BE IN THE COCKPIT. THIS PERSON MUST STOP THE PUMPS WHEN THE LOW PRESSURE FAULT LIGHT(S) (ON PANEL 40VU) COME ON, TO PREVENT OPERATION OF THE PUMPS(S) WITHOUT FUEL ('DRY RUNNING'). OPERATION OF THE PUMPS WITHOUT FUEL CAN CAUSE A FIRE.

Subtask 28-26-00-720-050-A ** ON A/C NOT FOR ALL

A. Functional Test of the FUEL AUTO TRANSFER FAULT of the Main Transfer System

Cockpit Fuel-Control Switches and Indications ** ON A/C NOT FOR ALL

(1) Do the test that follows:

ACTION	RESULT
1.On fuel control-panel 40VU: Push (in) the MODE SEL pushbutton switch	On fuel control-panel 40VU: The MAN light of the MODE SEL pushbutton switch goes off
Push (in) the CTR TK L XFR and R XFR pushbutton switches.	The OFF lights of the CTR TK L XFR and R XFR pushbutton switches go off.
2.On refuel/defuel control-panel 800VU: Set the MODE SELECT switch to the OFF position and lower the guard.	After approximately 10 seconds, on cockpit control-panels 130VU and 131VU: The MASTER CAUT lights come on On the ECAM upper DU, the amber caution that follows is shown: FUEL AUTO TRANSFER FAULT.
3.On fuel control-panel 40VU:	On fuel control-panel 40VU:
Release (out) the MODE SEL pushbutton switch	The MAN light of the MODE SEL pushbutton switch comes on
Release (out) the CTR TK L XFR pushbutton switch	The OFF light of the CTR TK PUMP 1 pushbutton switch comes on On the ECAM upper DU, the action that follows is shown to stop the fault: CTR TK L XFR.......ON
Release (out) the CTR TK R XFR pushbutton switch.	On fuel control-panel 40VU: The OFF light of the CTR TK PUMP 2 pushbutton switch comes on On the ECAM upper DU, the action that follows is shown to stop the fault: CTR TK R XFR.......ON.

NOTE: After you complete the maintenance procedure:

There is a risk of surge tank overflow if the MODE SEL (4QL) pushbutton switch stays in the MAN mode.

5. Close-up
Subtask 28-26-00-860-053-A ** ON A/C NOT FOR ALL

A. Aircraft Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).
(2) Close the access door 192MB.
(3) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-26-00-942-052-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety barriers.
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:17:45 UTC