Visual Check of Pipes, Couplings and LP Valve External to Tank From Front Spar to Disconnect Panel For Leaks With Booster Pump On and LP Valve Open

TASK 28-21-00-790-002-A
Visual Check of Pipes, Couplings and LP Valve External to Tank From Front Spar to Disconnect Panel For Leaks With Booster Pump On and LP Valve Open

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.

ZONE: 410
ZONE: 420
ZONE: 520
ZONE: 620

1. Reason for the Job
Refer to the MPD TASK: 282100-05
VISUAL CHECK OF PIPES, COUPLINGS AND LP VALVE EXTERNAL TO TANK FROM FRONT SPAR TO DISCONNECT PANEL FOR LEAKS WITH BOOSTER PUMP ON AND LP VALVE OPEN
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
520	LEFT WING FIXED LEADING EDGE
620	RIGHT WING FIXED LEADING EDGE
437AL, 447AL, 452AR, 462AR
413ET, 423ET, 424DR, 452DR, 452ER, 462DR, 462ER
413AL, 413CL, 414AZ, 423AL, 423AZ, 423CL, 471AL, 481AL
413EL, 414FR, 423FL, 424ER
423CR, 471AR, 471BL, 471BR, 481AR, 481BL, 481BR
472AR, 482AR

C. 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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 54-52-11-000-002-A	Removal of the Access Panels
TASK 54-52-11-000-002-B	Removal of the Access Panels
TASK 54-52-11-400-002-A	Installation of the Access Panels
TASK 54-52-11-400-002-B	Installation of the Access Panels
TASK 54-53-11-000-002-A	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-002-A	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Panel Location ** ON A/C NOT FOR ALL
Panel Location ** ON A/C NOT FOR ALL
Panel Location ** ON A/C NOT FOR ALL
Fuel Pump System ** ON A/C NOT FOR ALL
Fuel Pump System ** ON A/C NOT FOR ALL
Fuel Pump System ** ON A/C NOT FOR ALL

3. Job Set-up

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 28-21-00-941-053-A

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

Subtask 28-21-00-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) below the applicable access panels.
(2) Open the fan cowl doors:
(a) 437AL and 447AL (Ref. AMM TASK 71-13-00-010-010).
(3) Open the thrust reverser cowl-doors:
(a) For the left nacelle:

452AR (Ref. AMM TASK 78-32-00-010-010).

(b) For the right nacelle:

462AR (Ref. AMM TASK 78-32-00-010-010).

(4) Remove the applicable access panels:
(a) For the left wing, remove:

413AL, 413EL, 414FR and 413CL (Ref. AMM TASK 54-52-11-000-002).
414AZ, 471AL and 472AR (Ref. AMM TASK 54-53-11-000-002).

(b) For the right wing, remove:

423AL, 423CL, 423FL and 424ER (Ref. AMM TASK 54-52-11-000-002).
423AZ, 481AL and 482AR (Ref. AMM TASK 54-53-11-000-002).

Subtask 28-21-00-010-051-B ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) below the applicable access panels.
(2) Open the fan cowl doors:
(a) 437AL and 447AL (Ref. AMM TASK 71-13-00-010-040).
(3) Open the thrust reverser cowl-doors:
(a) For the left nacelle:

452AR (Ref. AMM TASK 78-36-00-010-040).

(b) For the right nacelle:

462AR (Ref. AMM TASK 78-36-00-010-040).

(4) Remove the applicable access panels:
(a) For the left wing, remove:

413AL and 413CL (Ref. AMM TASK 54-52-11-000-002).
414AZ, 471AL, 471AR, 471BL and 471BR (Ref. AMM TASK 54-53-11-000-002).

(b) For the right wing, remove:

423AL, 423CL and 423CR (Ref. AMM TASK 54-52-11-000-002).
423AZ, 481AL, 481AR, 481BL and 481BR (Ref. AMM TASK 54-53-11-000-002).

Subtask 28-21-00-010-051-D ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) in position below the applicable access panels.
(2) Open the fan cowl doors:
(a) 437AL and 447AL (Ref. AMM TASK 71-13-00-010-802).
(3) Open the applicable thrust reverser cowl-doors:
(a) For the left nacelle:

452AR, 452ER and 452DR (Ref. AMM TASK 78-36-00-010-802).

(b) For the right nacelle:

462ER, 462DR and 462AR (Ref. AMM TASK 78-36-00-010-802).

(4) Remove the applicable access panels:
(a) For the left wing, remove:

472AR and 413ET (Ref. AMM TASK 54-53-11-000-804).

(b) For the right wing, remove:

423ET, 482AR and 424DR (Ref. AMM TASK 54-53-11-000-804).

Subtask 28-21-00-860-079-A

C. 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) On the panel 115VU, make sure that the ENG/MASTER 1 and the ENG/MASTER 2 switches are in the OFF position.
(2) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(3) Do the EIS start procedure (ECAM only) (Ref. AMM TASK 31-60-00-860-001), then:

on the ECAM control panel (CP), push (in) the FUEL pushbutton switch (P/BSW)
make sure that the engine LP valves are shown closed (amber cross-line) on the ECAM lower display unit (DU).

(4) Make sure each wing fuel tank contains a minimum of 1000 kg (2204.6220 lb) of fuel. Refuel if necessary (Ref. AMM TASK 12-11-28-650-003).
(5) On the panel 115VU, put the ENG/MASTER 1 and the ENG/MASTER 2 switches in the ON position.
(6) On the ECAM lower DU:

make sure that the engine LP valves are open (green in-line).

Subtask 28-21-00-865-058-A

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25

Subtask 28-21-00-860-080-A

E. Aircraft Maintenance Configuration (continued)

Panel Location ** ON A/C NOT FOR ALL

Fuel Pump System ** ON A/C NOT FOR ALL

(1) On the panel 115VU:

put the ENG/MASTER 1 and ENG/MASTER 2 switches in the OFF position.

(2) On the panel 40VU:

push (in) the L TK PUMPS 1 and 2 and the R TK PUMPS 1 and 2 P/BSW
make sure that the OFF lights go off.

NOTE: The FAULT lights come on momentarily.

4. Procedure
Subtask 28-21-00-790-053-A ** ON A/C NOT FOR ALL

A. Leak Test
(1) Examine the main fuel-feed pipeline from the LP valve to the fluid disconnect panel for fuel leaks:
(a) Make sure that there are no leaks.

Subtask 28-21-00-790-053-B ** ON A/C NOT FOR ALL

A. Leak Test
(1) Examine the main fuel-feed line from the fuel double wall to the fluid disconnect panel for fuel leaks:
(a) Make sure that there are no leaks.

5. Close-up
Subtask 28-21-00-860-078-A

A. Aircraft Maintenance Configuration
(1) On the panel 40VU:

release (out) the L TK PUMPS 1 and 2 and R TK PUMPS 1 and 2 P/BSW
make sure the OFF lights come on.

Subtask 28-21-00-865-057-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25

Subtask 28-21-00-860-083-A

C. Aircraft Maintenance Configuration
(1) On the ECAM DU make sure that the LP valves are closed.
(2) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-21-00-410-051-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the removed access panels:
(a) For the left wing:

413AL, 413EL, 414FR and 413CL (Ref. AMM TASK 54-52-11-400-002).
414AZ, 471AL and 472AR (Ref. AMM TASK 54-53-11-400-002).

(b) For the right wing:

423AL, 423CL, 423FL and 424ER (Ref. AMM TASK 54-52-11-400-002).
423AZ, 481AL and 482AR (Ref. AMM TASK 54-53-11-400-002).

(3) Close the applicable thrust reverser cowl-doors:
(a) For the left nacelle:

452AR (Ref. AMM TASK 78-32-00-410-010).

(b) For the right nacelle:

462AR (Ref. AMM TASK 78-32-00-410-010).

(4) Close the fan cowl doors:
(a) 437AL and 447AL (Ref. AMM TASK 71-13-00-410-010).

Subtask 28-21-00-410-051-B ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the removed access panels:
(a) For the left wing:

413AL and 413CL (Ref. AMM TASK 54-52-11-400-002).
414AZ, 471AL, 471AR, 471BL and 471BR (Ref. AMM TASK 54-53-11-400-002).

(b) For the right wing:

423AL, 423CL and 423CR (Ref. AMM TASK 54-52-11-400-002).
423AZ, 481AL, 481AR, 481BL and 481BR (Ref. AMM TASK 54-53-11-400-002).

(3) Close the applicable thrust reverser cowl-doors:
(a) For the left nacelle:

452AR (Ref. AMM TASK 78-36-00-410-040).

(b) For the right nacelle:

462AR (Ref. AMM TASK 78-36-00-410-040).

(4) Close the fan cowl doors:
(a) 437AL and 447AL (Ref. AMM TASK 71-13-00-410-040).

Subtask 28-21-00-410-051-D ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels:
(a) For the left wing:

472AR and 413ET (Ref. AMM TASK 54-53-11-400-804).

(b) For the right wing:

423ET, 482AR and 424DR (Ref. AMM TASK 54-53-11-400-804).

(3) Close the applicable thrust reverser cowl-doors:
(a) For the left nacelle:

452AR, 452ER and 452DR (Ref. AMM TASK 78-36-00-410-802).

(b) For the right nacelle:

462ER, 462DR and 462AR (Ref. AMM TASK 78-36-00-410-802).

(4) Close the fan cowl doors:
(a) 437AL and 447AL (Ref. AMM TASK 71-13-00-410-802).

Subtask 28-21-00-942-058-A

E. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 07:30:50 UTC