To Set the Transfer Valves Open for Flight

TASK 28-12-00-040-003-A
To Set the Transfer Valves Open for Flight

ZONE: 210
FIN: 27QM ** ON A/C NOT FOR ALL
FIN: 28QM ** ON A/C NOT FOR ALL
FIN: 29QM ** ON A/C NOT FOR ALL
FIN: 30QM ** ON A/C NOT FOR ALL

1. Reason for the Job
MMEL 28-12-01B
OVERPRESSURE PROTECTOR BETWEEN THE INNER AND THE OUTER TANK
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

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

3. Job Set-up
Subtask 28-12-00-941-062-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) In the cockpit, put a WARNING NOTICE(S) in position to tell persons not to operate the flight controls.

Subtask 28-12-00-650-058-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 28-12-00-860-065-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 the FUEL pushbutton switch to show the FUEL page on the ECAM lower display unit.

Subtask 28-12-00-865-058-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
FOR FIN: 102QM (PROTECTOROVERPRESSURE, L WING TK)
49VU	FUEL/XFR VALVE1/WING/R	2QP	A11
121VU	FUEL/XFR VALVE2/WING/R	4QP	M23
FOR FIN: 103QM (PROTECTOROVERPRESSURE, R WING TK)
49VU	FUEL/XFR VALVE1/WING/L	1QP	A10
121VU	FUEL/XFR VALVE2/WING/L	3QP	M22

4. Procedure
Subtask 28-12-00-040-054-A ** ON A/C NOT FOR ALL

A. To Set the LH Wing Transfer Valves 27QM and 28QM Open for Flight
(1) If overpressure protector 102QM or 103QM is damaged do this procedure:

NOTE: The circuit breakers must be opened and closed in the sequence given.

ACTION	RESULT
1.On the panel 49VU:
open the circuit breaker 2QP
wait 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 left-wing outer-cell fuel content decreases and the left-wing inner-cell fuel content increases.
2.On the panel 121VU:
open the circuit breaker 4QP
wait ten seconds.	the green left-wing transfer-valve indicator, open position stays in view the amber right-wing transfer-valve indicator, intermediate (amber) position stays in view the left-wing outer-cell fuel content decreases and the left-wing inner-cell fuel content increases.
3.On the panel 49VU:
close the circuit breaker 2QP.	the amber right-wing transfer-valve indicator moves from the intermediate position to the green open position both wing outer-cell fuel contents decrease and the inner-cell fuel contents increase.
4.On the panel 121VU: close the circuit breaker 4QP.

(2) Monitor the wing fuel quantity indications on the ECAM display unit. Make sure the quantity of fuel in the wing tank inner cell increases as fuel moves from the outer cell. The LH 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.

Subtask 28-12-00-040-055-A ** ON A/C NOT FOR ALL

B. To Set the RH Wing Transfer Valves 29QM and 30QM Open for Flight
(1) If overpressure protector 102QM or 103QM is damaged do this procedure:

NOTE: The circuit breakers must be opened and closed in the sequence given.

ACTION	RESULT
1.On the panel 49VU:
open circuit breaker 1QP
wait ten seconds.	the green right-wing transfer-valve indicator moves from the closed position to the open position the green left-wing transfer-valve indicator moves from the closed position to the intermediate (amber) position the right-wing outer-cell fuel content decreases and the right-wing inner-cell fuel content increases.
2.On the panel 121VU:
open the circuit breaker 3QP
wait ten seconds.	the green right-wing transfer-valve indicator, open position stays in view the amber left-wing transfer-valve indicator, intermediate (amber) position stays in view the right-wing outer-cell fuel content decreases and the right-wing inner-cell fuel content increases.
3.On the panel 49VU:
close the circuit breaker 1QP.	the amber left-wing transfer valve indicator moves from the intermediate position to the green open position both wing outer cell fuel contents decrease and the inner cell fuel contents increase.
4.On panel 121VU: close the circuit breaker 3QP.

(2) Monitor the wing fuel quantity indications on the ECAM display unit. Make sure the quantity of fuel in the wing tank inner cell increases as fuel moves from the outer cell. The 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.

5. Close-up
Subtask 28-12-00-860-066-A ** ON A/C NOT FOR ALL

A. Aircraft Configuration
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(3) Make a note in the aircraft technical log that the applicable transfer valves are set to the open position.

Subtask 28-12-00-942-065-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.05 07:03:14 UTC