Operational Leak Test of the Air Release Valve Float

TASK 28-21-00-710-011-A
Operational Leak Test of the Air Release Valve Float

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 test for fuel leakage from each air release valve float.
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 28-25-00-869-001-A	Fuel Transfer
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up

NOTE: This test is for the Air Release Valves 86QM(87QM). It is to test the float, the float seal and the diaphragm/vent valve assembly seal in the closed position only. It does not test the air release or the check valve mode of operation.

Subtask 28-21-00-941-080-A

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

Subtask 28-21-00-860-089-A ** ON A/C NOT FOR ALL

B. 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) 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), then:

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).

(3) Make sure that the applicable fuel tank contains the minimum fuel quantity to do the test, as follows:

the inner cells of the wing tank contains a minimum of 700 kg (1543 lb) of fuel
the center tank contains a minimum of 1000 kg (2205 lb) of fuel.

(4) Refuel if necessary (Ref. AMM TASK 12-11-28-650-003).
(5) Record the fuel quantities for each of the tanks.

Subtask 28-21-00-860-089-C ** ON A/C NOT FOR ALL

B. 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) 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), then:

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).

(3) Make sure that the wing tanks contains a minimum of 700 kg (1543 lb) of fuel.
(4) Refuel if necessary (Ref. AMM TASK 12-11-28-650-003).
(5) Record the fuel quantities for each of the tanks.

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 28-21-00-710-072-A ** ON A/C NOT FOR ALL

A. Preparation for Test
(1) On the panel 25VU:
(a) Make sure that the APU MASTER SW P/BSW (14KD) is released (out).
(b) Make sure that the APU MASTER SW P/BSW (14KD) legends are off.
(2) On the ECAM lower DU make sure that:

the APU LP valve shows closed (green crossed line)
the lines that connect to the valve are not shown.

(3) On the panel 40VU:
(a) Make sure that the X FEED P/BSW (4QE) is released (out).
(b) Make sure that the X FEED P/BSW (4QE) legends are off.
(4) On the ECAM lower DU make sure that:

the X FEED valve shows closed (green crossed line)
the lines that connect to the valve are not shown.

(5) On the panel 40VU make sure that:

all the fuel pump P/BSWs are in the off position
all the pump off lights are on.

(6) On the ECAM lower DU make sure that:

the amber cross-line shows (pump off).

Subtask 28-21-00-710-072-C ** ON A/C NOT FOR ALL

the APU LP valve shows closed (white APU title and triangle)
the line that connects to the valve symbol (triangle) is not shown.

(3) On the panel 40VU:
(a) Make sure that the X FEED P/BSW (4QE) is released (out).
(b) Make sure that the X FEED P/BSW (4QE) legends are off.
(4) On the ECAM lower DU make sure that:

the X FEED valve shows closed (green crossed line)
the lines that connect to the valve are not shown.

(5) On the panel 40VU make sure that:

all the fuel pump P/BSWs are in the off position
all the pump off lights are on.

(6) On the ECAM lower DU make sure that:

the amber cross-line shows (pump off).

Subtask 28-21-00-710-072-D ** ON A/C NOT FOR ALL

the APU LP valve shows closed (white APU title and triangle)
the line that connects to the valve symbol (triangle) is not shown.

(3) On the panel 40VU:
(a) Make sure that the X FEED P/BSW (4QE) is pushed (in).
(b) Make sure that the X FEED P/BSW (4QE) legends are on.
(4) On the ECAM lower DU make sure that:

the X FEED valve shows open (green in-line)
the lines that connect to the valve are shown.

(5) On the panel 40VU make sure that:

all the fuel pump P/BSWs are in the off position
all the pump off lights are on.

(6) On the ECAM lower DU make sure that:

the amber cross-line shows (pump off).

Subtask 28-21-00-710-071-A ** ON A/C NOT FOR ALL

B. Operational Leak Test

ACTION	RESULT
1.On the panel 40VU: push (in) the CTR TK PUMP 1 P/BSW.	On the panel 40VU: the CTR TK PUMP 1 P/BSW OFF light goes off the CTR TK PUMP 1 P/BSW FAULT light comes on momentarily and then goes off.
	On the ECAM lower DU: the CTR TK PUMP 1 shows green in-line (pump on).
2.On the panel 40VU: wait 30 minutes and then release (out) the CTR TK PUMP 1 P/BSW.	On the panel 40VU: the CTR TK PUMP 1 P/BSW OFF light comes on.
3.Calculate the quantity of fuel transferred to the left wing inner cell.	The quantity of fuel transferred in 30 minutes must be less than 110 kg (240 lb).
4.On the panel 40VU: make sure all the fuel pump P/BSWs are in the OFF position.	On the panel 40VU: all pump OFF lights are on.
	On the ECAM lower DU: the amber cross-line shows (pump off).
5.On the panel 40VU: push (in) the CTR TK PUMP 2 P/BSW.	On the panel 40VU: the CTR TK PUMP 2 P/BSW OFF light goes off the CTR TK PUMP 2 P/BSW FAULT light comes on momentarily and then goes off.
	On the ECAM lower DU: the CTR TK PUMP 2 shows green in-line (pump on).
6.On the panel 40VU: wait 30 minutes and then release (out) the CTR TK PUMP 2 P/BSW.	On the panel 40VU: the CTR TK PUMP 2 P/BSW OFF light comes on.
7.Calculate the quantity of fuel transferred to the right wing inner cell.	The quantity of fuel transferred in 30 minutes must be less than 110 kg (240 lb).

Subtask 28-21-00-710-071-B ** ON A/C NOT FOR ALL

B. Operational Leak Test

ACTION	RESULT
1.On the panel 40VU: push (in) the R TK PUMPS 1 P/BSW.	On the panel 40VU: the R TK PUMPS 1 P/BSW OFF light goes off the R TK PUMPS 1 P/BSW FAULT light comes on momentarily and then goes off.
	On the ECAM lower DU: the R TK PUMP 1 shows green in-line (pump on).
2.On the panel 40VU: wait 30 minutes and then release (out) the R TK PUMPS 1 P/BSW.	On the panel 40VU: the R TK PUMPS 1 P/BSW OFF light comes on.
3.Calculate the quantity of fuel transferred to the left wing inner cell.	The quantity of fuel transferred in 30 minutes must be less than 110 kg (243 lb).
4.On the panel 40VU: make sure all the fuel pump P/BSWs are in the OFF position.	On the panel 40VU: all pump OFF lights are on.
	On the ECAM lower DU: the amber cross-line shows (pump off).
5.On the panel 40VU: push (in) the L TK PUMPS 1 P/BSW.	On the panel 40VU: the L TK PUMPS 1 P/BSW OFF light goes off the L TK PUMPS 1 P/BSW FAULT light comes on momentarily and then goes off.
	On the ECAM lower DU: the L TK PUMPS 1 shows green in-line (pump on).
6.On the panel 40VU: wait 30 minutes and then release (out) the L TK PUMPS 1 P/BSW.	On the panel 40VU: the L TK PUMPS 1 P/BSW OFF light comes on.
7.Calculate the quantity of fuel transferred to the right wing inner cell.	The quantity of fuel transferred in 30 minutes must be less than 110 kg (243 lb).

5. Close-up
Subtask 28-21-00-860-090-A

A. Aircraft Configuration
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-21-00-942-084-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 06:17:24 UTC