To Set the LH Wing Transfer Valve Open for Flight

TASK 28-15-00-040-001-A
To Set the LH Wing Transfer Valve Open for Flight

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.

FIN: 27QM ** ON A/C NOT FOR ALL
FIN: 28QM ** ON A/C NOT FOR ALL

1. Reason for the Job
MMEL 28-15-01C
LH WING TRANSFER VALVE

NOTE: This procedure must only be done if the aircraft is energized and will stay energized until take-off. If possible do this procedure immediately before take-off. This will prevent possible fuel overflow from the outer fuel tanks into the vent system. If you de-energize the aircraft after this procedure and before take-off, you must do this procedure again when the aircraft is energized. This is because the transfer valve will close when the aircraft is energized again.

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 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

3. Job Set-up
Subtask 28-15-00-941-056-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.

Subtask 28-15-00-650-054-A ** ON A/C NOT FOR ALL

B. Fuel Configuration
(1) Refuel the aircraft with the necessary quantity of fuel (Ref. AMM TASK 12-11-28-650-003).
(2) Before you continue with this procedure make sure that:

the quantity of fuel onboard the aircraft is correct
the refuel/defuel panel door is closed.

Subtask 28-15-00-860-058-A ** ON A/C NOT FOR ALL

C. 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, push (in) the FUEL pushbutton switch to show the FUEL page on the ECAM lower display unit.

Subtask 28-15-00-865-053-A ** ON A/C NOT FOR ALL

D. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/XFR VALVE1/WING/R	2QP	A11
121VU	FUEL/XFR VALVE2/WING/R	4QP	M23

4. Procedure
Subtask 28-15-00-040-050-A ** ON A/C NOT FOR ALL

A. To Set the Transfer Valve 27QM Open for Flight
(1) If the transfer valve 28QM is unserviceable, set the transfer valve 27QM to the open position as follows:

ACTION	RESULT
1.On the panel 121VU: open the circuit breaker 4QP wait for ten seconds.	the green left-wing transfer-valve indicator moves from the closed position to the open position the green right-wing transfer-valve indicator moves from the closed position to the intermediate (amber) position the fuel content in the left wing outer-cell decreases and the fuel content in the left wing inner-cell increases.
2.On the panel 121VU: close the circuit breaker 4QP.	the amber right-wing transfer-valve indicator moves from the intermediate position to the green open position the fuel content in the wings outer-cell decreases and the fuel content in the wings inner-cell increases.

(2) Monitor the wing fuel-quantity indication on the ECAM display unit.
(3) Make sure the quantities of fuel in the wing tank inner-cells increase as fuel moves from the outer cells.
(4) The LH and RH wing transfer-valves are now set to the open position and the aircraft is ready for flight.

NOTE: The wing transfer valves will close again if:

the refuel/defuel panel door is opened
the aircraft is energized.

Subtask 28-15-00-040-052-A ** ON A/C NOT FOR ALL

B. To Set the Transfer Valve 28QM Open for Flight
(1) If the transfer valve 27QM is unserviceable, set the transfer valve 28QM to the open position as follows:

ACTION	RESULT
1.On the panel 49VU: open the circuit breaker 2QP wait for ten seconds.	the green left-wing transfer-valve indicator moves from the closed position to the open position the green right-wing transfer-valve indicator moves from the closed position to the intermediate (amber) position the fuel content in the left wing outer-cell decreases and the fuel content in the left wing inner-cell increases.
2.On panel 49VU: close the circuit breaker 2QP.	the amber right-wing transfer-valve indicator moves from the intermediate position to the green open position the fuel content in the wings outer-cell decreases and the fuel content in the wings inner-cell increases.

NOTE: The wing transfer valves will close again if:

the refuel/defuel panel door is opened
the aircraft is energized.

Subtask 28-15-00-040-052-D ** ON A/C NOT FOR ALL

B. To Set the Transfer Valve 28QM Open for Flight
(1) If the transfer valve 27QM is unserviceable, set the transfer valve 28QM to the open position as follows:

ACTION	RESULT
1.On the panel 49VU: open the circuit breaker 2QP wait for ten seconds.	the green left-wing transfer-valve indicator moves from the closed position to the open position the green right-wing transfer-valve indicator moves from the closed position to the intermediate (amber) position the fuel content in the left wing outer-cell decreases and the fuel content in the left wing inner-cell increases the ECAM upper DU will show the caution FUEL R WING TK OVERFLOW.
2.On panel 49VU: close the circuit breaker 2QP.	the amber right-wing transfer-valve indicator moves from the intermediate position to the green open position the fuel content in the wings outer-cell decreases and the fuel content in the wings inner-cell increases on the ECAM upper DU, the caution FUEL R WING TK OVERFLOW goes off.

NOTE: The wing transfer valves will close again if:

the refuel/defuel panel door is opened
the aircraft is energized.

5. Close-up
Subtask 28-15-00-860-059-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Make a note in the aircraft technical log that the applicable LH and RH wing transfer-valves are set to the open position.

Subtask 28-15-00-942-054-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.02 06:17:14 UTC