Engine LP Valve Indication - When ECAM Display Inoperative

TASK 28-40-00-040-009-A
Engine LP Valve Indication - When ECAM Display Inoperative

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
MMEL 28-07-04-01A
ENGINE LP FUEL VALVE INDICATION ON THE FUEL SD PAGE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

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 27-80-00-866-004-A	Extending the Slats on the Ground
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 57-41-37-000-003-A	Removal of the Access Panel
TASK 57-41-37-400-003-A	Installation of the Access Panel
LP Valve - Cockpit Component Location
LP Valve - Component Location and Detail

3. Job Set-up
Subtask 28-40-00-941-066-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.
(3) Put a WARNING NOTICE(S) in position to tell persons not to operate the slats.
(4) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the bleed air.

Subtask 28-40-00-010-058-A

B. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position in zone 522(622).
(2) Remove the applicable access panel(s) (Ref. AMM TASK 57-41-37-000-003):

for the LH LP valve 12QM, remove panel 522AT
for the RH LP valve 13QM, remove panel 622AT.

Subtask 28-40-00-860-063-A

C. Aircraft Maintenance Configuration
(1) Make sure that there is no bleed air.
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) Fully extend the slats (Ref. AMM TASK 27-80-00-866-004).
(4) Install a 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever.

Subtask 28-40-00-865-057-A

D. Make sure that this(these) circuit breaker(s) is(are) closed:

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

4. Procedure
Subtask 28-40-00-040-079-A

A. Test of the valve 12QM
(1) In the test that follows, on each operation of the LP valve:

make sure that the see/feel indicator operates smoothly, from the valve open (valve closed) position to the valve closed (valve open) position
make sure that the see/feel indicator marks are accurately aligned in the valve open position
make sure that the see/feel indicator marks are at 90 degrees to each other in the valve closed position.

(2) For the valve 12QM, do this test:

ACTION	RESULT
1.On the panel 115VU: make sure that the ENG/MASTER 1 switch is in the OFF position.
2.On the LP valve actuator 9QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is closed.
3.On the panel 121VU: Open, safety and tag this(these) circuit breaker(s): 3QG.	The ENG 1 LP valve MOTOR 2 SUPPLY and CONTROL are isolated.
4.On the panel 115VU: put the ENG/MASTER 1 switch to the ON position.	In zone 510, the LP valve moves to the open position.
5.On the LP valve actuator 9QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is open.
6.On the panel 115VU: put the ENG/MASTER 1 switch to the OFF position.	In zone 510 the LP valve moves to the closed position.
7.On the LP valve actuator 9QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is closed.
8.On the panel 121VU: Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 3QG.	The ENG 1 LP valve MOTOR 2 SUPPLY and CONTROL are energized.
9.On the panel 49VU: Open, safety and tag this(these) circuit breaker(s): 1QG.	The ENG 1 LP valve MOTOR 1 SUPPLY and CONTROL are isolated.
10.On panel 115VU: put the ENG/MASTER 1 switch to the ON position.	In zone 510 the LP valve moves to the open position.
11.On the LP valve actuator 9QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is open.
12.On the panel 115VU: put the ENG/MASTER 1 switch to the OFF position.	In zone 510 the LP valve moves to the closed position.
13.On the LP valve actuator 9QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is closed.
14.On the panel 49VU: Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1QG.	The ENG 1 LP valve MOTOR 1 SUPPLY and CONTROL are energized.

Subtask 28-40-00-040-080-A

B. Test of the valve 13QM
(1) In the test that follows, on each operation of the LP valve:

make sure that the see/feel indicator operates smoothly, from the valve open (valve closed) position to the valve closed (valve open) position
make sure that the see/feel indicator marks are accurately aligned in the valve open position
make sure that the see/feel indicator marks are at 90 degrees to each other in the valve closed position.

(2) For the valve 13QM, do this test:

ACTION	RESULT
1.On the panel 115VU: make sure that the ENG/MASTER 2 switch is in the OFF position.
2.On the LP valve actuator 10QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is closed.
3.On the panel 121VU: Open, safety and tag this(these) circuit breaker(s): 4QG.	The ENG 2 LP valve MOTOR 2 SUPPLY and CONTROL are isolated.
4.On the panel 115VU: put the ENG/MASTER 2 switch to the ON position.	In zone 610, the LP valve moves to the open position.
5.On the LP valve actuator 10QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is open.
6.On the panel 115VU: put the ENG/MASTER 2 switch to the OFF position.	In zone 610 the LP valve moves to the closed position.
7.On the LP valve actuator 10QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is closed.
8.On the panel 121VU: Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 4QG.	The ENG 2 LP valve MOTOR 2 SUPPLY and CONTROL are energized.
9.On the panel 49VU: Open, safety and tag this(these) circuit breaker(s): 2QG.	The ENG 2 LP valve MOTOR 1 SUPPLY and CONTROL are isolated.
10.On panel 115VU: put the ENG/MASTER 2 switch to the ON position.	In zone 610 the LP valve moves to the open position.
11.On the LP valve actuator 10QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is open.
12.On the panel 115VU: put the ENG/MASTER 2 switch to the OFF position.	In zone 610 the LP valve moves to the closed position.
13.On the LP valve actuator 10QG: look at the position of the mechanical see/feel indicator.	The indicator shows that the LP valve is closed.
14.On the panel 49VU: Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 2QG.	The ENG 2 LP valve MOTOR 1 SUPPLY and CONTROL are energized.

5. Close-up
Subtask 28-40-00-860-064-A

A. Aircraft Maintenance Configuration
(1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever.
(2) Fully retract the slats (Ref. AMM TASK 27-80-00-866-005):
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(4) Make an entry in the aircraft technical log that the LH/RH or both engine LP valve indication(s) will not be displayed on the ECAM DU.

Subtask 28-40-00-410-056-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panel(s) (Ref. AMM TASK 57-41-37-400-003):

for the LH LP valve 12QM, install 522AT
for the RH LP valve 13QM, install 622AT.

Subtask 28-40-00-942-063-A

C. 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] 2026.04.02 06:18:03 UTC