Operational Test of the Fuel Flow through the Fuel Pumps with Gravity Feed

TASK 28-21-00-710-006-A
Operational Test of the Fuel Flow through the Fuel Pumps with Gravity Feed

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
To make sure that the fuel flows to the engines when the Fuel Pumps are not running.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(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 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 71-00-00-710-003-A	Engine Automatic Start
TASK 71-00-00-710-003-B	Engine Automatic Start
TASK 71-00-00-710-018-A	Discontinued Start, Restart and Shutdown Procedures
TASK 71-00-00-710-028-A	Engine Shutdown
TASK 71-00-00-710-028-B	Engine Shutdown
TASK 71-00-00-710-043-A	Normal Engine Automatic-Start Procedure

3. Job Set-up
Subtask 28-21-00-941-069-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 28-21-00-860-061-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(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 P/BSW:

make sure that the FUEL page shows on the ECAM lower Display Unit (DU).

(4) Make sure that each wing tank contains at least a minimum of 2000 kg (4400 lb) to a maximum 3000 kg (6600 lb) of fuel. Refuel as necessary (Ref. AMM TASK 12-11-28-650-003).
(5) Fully defuel the center tank by defuel (Ref. AMM TASK 28-25-00-650-001) or transfer (Ref. AMM TASK 28-25-00-869-001) and drain remaining fuel (Ref. AMM TASK 28-25-00-650-003).
(6) Start the engines (Ref. AMM TASK 71-00-00-710-003).

Subtask 28-21-00-860-061-B ** ON A/C NOT FOR ALL

make sure that the FUEL page shows on the ECAM lower Display Unit (DU).

Subtask 28-21-00-860-061-C ** ON A/C NOT FOR ALL

make sure that the FUEL page shows on the ECAM lower Display Unit (DU).

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 28-21-00-710-055-A

A. Operational Test of The Fuel Flow through the Fuel Pumps with Gravity Feed (Left Wing Tank Main Pumps)

ACTION	RESULT
1.With the aircraft engines at FLX TO/MCT power and the fuel tank pumps running.
2.On the panel 40VU:	On the ECAM lower DU:
make sure that the X FEED P/BSW is released (out).	the FUEL page shows the X-FEED valve symbol closed (green cross-line).
release (out) the L TK PUMPS 1 and 2 P/BSW.	On the panel 40VU:
	the L TK PUMPS 1 and 2 P/BSW OFF lights come on.
	On the ECAM lower DU:
	the FUEL page shows the symbols for the left fuel-tank pump 1 and 2 are off (amber cross-line).
	On the ECAM upper DU, these amber cautions are shown:
	L TK PUMPS 1 & 2 LO PRESS
	On the panels 130VU and 131VU:
	the MASTER CAUT lights come on.
	One chime sounds.
3.On the ECAM upper DU:	On the ECAM upper DU:
do a check of the N2% and EGT indications.	the engine N2% and EGT deg.C indications stay stable for 60 seconds at FLX TO/MCT power.
4.On the panel 40VU:	On the panel 40VU:
push (in) the L TK PUMPS 1 and 2 P/BSW.	the L TK PUMPS 1 and 2 P/BSW FAULT lights come on momentarily and then go off when the FAULT lights go off, the L TK PUMPS 1 and 2 P/BSW OFF lights go off.
	On the ECAM lower DU:
	the left wing fuel pump 1 and pump 2 (amber cross-line) cautions go off the pump symbols show green in-line.

Subtask 28-21-00-710-056-A

B. Operational Test of the Fuel Flow through the Fuel Pumps with Gravity Feed (Right Wing Tank Main Pumps)

ACTION	RESULT
1.With the aircraft engines at FLX TO/MCT power and the fuel pumps running.
2.On the panel 40VU:	On the ECAM lower DU:
make sure that the X FEED P/BSW is released (out).	the FUEL page shows the X-FEED valve symbol closed (green cross-line).
release (out) the R TK PUMPS 1 and 2 P/BSW.	On the panel 40VU:
	the R TK PUMPS 1 and 2 P/BSW OFF lights come on.
	On the ECAM lower DU:
	the FUEL page shows the symbols (amber cross-lines) for the right fuel-tank pump 1 and 2.
	On the ECAM upper DU, these amber cautions are shown:
	R TK PUMPS 1 & 2 LO PRESS
	On the panels 130VU and 131VU:
	the MASTER CAUT lights come on.
	One chime sounds.
3.On the ECAM upper DU:	On the ECAM upper DU:
do a check of the N2% and EGT engine indications.	the engine N2% and the EGT deg.C indications stay stable for 60 seconds at FLX TO/MCT power.
4.On the panel 40VU:	On the panel 40VU:
push (in) the R TK PUMPS 1 and 2 P/BSW.	the R TK PUMPS 1 and 2 P/BSW FAULT light comes on momentarily and then goes off when the FAULT light goes off, the R TK PUMPS 1 and 2 P/BSW OFF lights goes off.
	On the ECAM lower DU:
	the right tank pump 1 and 2 (amber cross-line) cautions go off the pump symbols show green in-line.

5. Close-up
Subtask 28-21-00-860-062-A ** ON A/C NOT FOR ALL

A. Aircraft Configuration
(1) Stop the engines (Ref. AMM TASK 71-00-00-710-028).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-21-00-860-062-B ** ON A/C NOT FOR ALL

A. Aircraft Configuration
(1) Stop the engines (Ref. AMM TASK 71-00-00-710-018).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-21-00-860-062-C ** ON A/C NOT FOR ALL

A. Aircraft Configuration
(1) Stop the engines (Ref. AMM TASK 71-00-00-710-028).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-21-00-942-074-A

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 07:01:20 UTC