Leak Test of the Refuel System

TASK 28-25-00-790-801-A
Leak Test of the Refuel System

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

WARNING: STOP THE FUEL TANKER 60 m (196.85 ft) FROM THE AIRCRAFT NOSE WHILE THE WEATHER RADAR OPERATES. DO NOT OPERATE THE FUEL TANKER/PUMP UNIT UNTIL YOU STOP THE OPERATION OF THE WEATHER RADAR.

WARNING: MAKE SURE THE AREA AROUND THE AIRCRAFT IS SAFE BEFORE YOU START THE REFUEL/DEFUEL PROCEDURE. IN THE SAFETY AREA, DO NOT:

SMOKE
MAKE SPARKS OR FIRE
USE ANY EQUIPMENT WHICH IS NOT APPROVED FOR REFUEL/DEFUEL PROCEDURES.

AIRCRAFT FUEL IS FLAMMABLE.

WARNING: DO NOT SPILL FUEL ON THE ENGINES OR THE BRAKES. IF YOU SPILL FUEL ON ENGINES OR BRAKES THAT ARE HOT, IT CAN CAUSE FIRES.

WARNING: MAKE SURE THAT THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

ZONE: 130
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ZONE: 500
ZONE: 600

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
140	CENTER WING
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
160	BULK CARGO COMPARTMENT AFT BULKHEAD OF AFT CARGO COMPARTMENT TO AFT BULKHEAD OF BULK CARGO COMPARTMENT
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT
500	LEFT WING
600	RIGHT WING
622KB
192MB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-001-A	General Refuel/Defuel Safety Procedures
TASK 12-11-28-650-002-A	Refuel/Defuel Safety Procedures for use in the Hangar
TASK 12-34-24-869-001-A	Aircraft Bonding and Grounding (Earthing) for the Refuel/Defuel or Oxygen Servicing Operations
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 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-10-00-910-003-A	Safety Procedures When You Do Work in a Dry Fuel Tank
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-005-A	To Drain the Remaining Fuel from the Additional Center Tank (ACT)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
Refuel/Defuel Control Panel ** ON A/C NOT FOR ALL
Refuel/Defuel Control Panel ** ON A/C NOT FOR ALL
Refuel/Defuel Control Panel ** ON A/C NOT FOR ALL
Refuel/Defuel Control Panel ** ON A/C NOT FOR ALL
Refuel/Defuel Control Panel ** ON A/C NOT FOR ALL
Refuel/Defuel Control Panel ** ON A/C NOT FOR ALL
Refuel/Defuel Control Panel ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-25-00-941-093-A

A. Safety Precautions
(1) Obey the safety procedures (Ref. AMM TASK 28-00-00-910-001) and (Ref. AMM TASK 28-10-00-910-001).
(2) Obey the refuel/defuel safety procedures (Ref. AMM TASK 12-11-28-650-001) and (Ref. AMM TASK 12-11-28-650-002).
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 28-25-00-281-051-A

B. Fuel Sampling

NOTE: It is recommended to keep one type of fuel. Although approved types can be mixed if it is necessary to continue an operation. Refer to Section 2 of your Flight Manual (Ref. FM Section 2) for a complete list of approved fuels. Refer to Airbus Cold Weather Operations Information and Operations Policy Fueling Procedures for safety precautions with mixed fuel.

(1) Do a check for water contamination. Test a sample of fuel removed from the fuel tanker/pump unit.

Subtask 28-25-00-860-095-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT YOU BOND THE FUEL TANKER TO THE AIRCRAFT. IF YOU DO NOT, AN ELECTRICAL DISCHARGE CAN OCCUR WHICH CAN CAUSE AN EXPLOSION OR FIRE.

(1) Obey the local regulations for grounding (earthing) the aircraft. If you must ground (earth) the aircraft:
(a) Ground (earth) the fuel tanker/pump unit and the aircraft correctly (Ref. AMM TASK 12-34-24-869-001).
(2) Bond the fuel tanker/pump unit to the aircraft (Ref. AMM TASK 12-34-24-869-001).
(3) Make sure that the wheel chocks are in correct position:
(a) Move the aft Nose-Landing-Gear (NLG) wheel-chocks away from the tires.

NOTE: During the refuel the NLG tires roll aft as the Main Landing-Gear (MLG) shock-absorbers compress.

(b) Make sure that the wheel chocks do not touch the MLG tires.

NOTE: The weight of the fuel can lower the aircraft and cause the tires to catch the wheel chocks.

(4) Make sure that the tanks related to the fuel lines, that you will check for leaks, are fully defueled and drained (Ref. AMM TASK 28-25-00-650-001) and (Ref. AMM TASK 28-25-00-650-003).
(5) Make sure that the fuel tank and pipes in maintenance are dry and closed (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 28-10-00-910-003).
(6) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE adjacent to refuel/defuel coupling 40QM.
(7) Remove refuel/defuel coupling cap 41QM.
(8) Make sure that the hose-coupling of the fuel tanker/pump unit is clean.

WARNING: MAKE SURE THAT THE FUEL SUPPLY HOSE IS CORRECTLY CONNECTED TO THE COUPLING BEFORE YOU REFUEL/DEFUEL THE AIRCRAFT. DO NOT CONNECT THE FUEL SUPPLY HOSE IF THERE ARE SIGNS OF DAMAGE TO THE AIRCRAFT COUPLING LUGS OR SLOTS.

(9) Connect the hose coupling of the fuel tanker/pump unit to aircraft refuel/defuel coupling 40QM.
(10) Set the fuel tanker/pump unit to the refuel mode.
(11) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(12) Do the Electronic Instrument System (EIS) (Electronic Centralized Aircraft Monitoring - ECAM only) start procedure (Ref. AMM TASK 31-60-00-860-001).

CAUTION: BEFORE YOU CLOSE THE CROSSFEED VALVE, MAKE SURE THAT THE FUEL PUMP(S) IS(ARE) OFF. THIS WILL PREVENT DAMAGE TO THE CROSSFEED VALVE.

(13) Fuel spill prevention:

NOTE: It is recommended that all of the fuel pumps are switched off to do this procedure. It is permitted for the wing tank pumps to be switched on if there is minimum of 750 kg (1653.47 lb) of fuel in the related wing tank(s).

(a) In the cockpit, on fuel panel 40VU make sure that:

X FEED pushbutton switch (P/BSW) 4QE is released (the OPEN legend is off)
MODE SEL P/BSW 48QA is in the AUTO position (the MAN legend is off)
CTR TK PUMP 1 (33QA) and CTR TK PUMP 2 (34QA) P/BSWs are released (the OFF legends are on).

(14) Do a check of ECAM indications:
(a) On ECAM control panel 11VU push the FUEL P/BSW.

NOTE: On the ECAM lower display-unit, the FUEL page comes into view.

(b) On ECAM control panel 11VU push the STS P/BSW.

NOTE: On the ECAM lower display-unit, the STATUS page comes into view.

Subtask 28-25-00-860-095-D ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration

NOTE: After you complete the maintenance procedure that follows:

There is a risk of surge tank overflow if the MODE SEL (4QL) pushbutton switch stays in the MAN mode.

WARNING: MAKE SURE THAT YOU BOND THE FUEL TANKER TO THE AIRCRAFT. IF YOU DO NOT, AN ELECTRICAL DISCHARGE CAN OCCUR WHICH CAN CAUSE AN EXPLOSION OR FIRE.

(1) Obey the local regulations for grounding (earthing) the aircraft. If you must ground (earth) the aircraft:
(a) Ground (earth) the fuel tanker/pump unit and the aircraft correctly (Ref. AMM TASK 12-34-24-869-001).
(2) Bond the fuel tanker/pump unit to the aircraft (Ref. AMM TASK 12-34-24-869-001).
(3) Make sure that the wheel chocks are in their correct position:
(a) Move the aft Nose-Landing-Gear (NLG) wheel-chocks away from the tires.

NOTE: During the refuel, the NLG tires roll aft as the Main Landing-Gear (MLG) shock-absorbers compress.

(b) Make sure that the wheel chocks do not touch the MLG tires.

NOTE: The weight of the fuel can lower the aircraft and cause the tires to catch the wheel chocks.

(4) Make sure that the fuel lines and the related tanks that you examine for leaks are fully defueled and drained (Ref. AMM TASK 28-25-00-650-001) and (Ref. AMM TASK 28-25-00-650-003).
(5) Make sure that the fuel tank and the pipes in the maintenance are dry and closed (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 28-10-00-910-003).
(6) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE adjacent to refuel/defuel coupling 40QM.
(7) Remove refuel/defuel coupling-cap 41QM.
(8) Make sure that the hose coupling of the fuel tanker/pump unit is clean.

(9) Connect the hose coupling of the fuel tanker/pump unit to aircraft refuel/defuel coupling 40QM.
(10) Set the fuel tanker/pump unit to the refuel mode.
(11) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(12) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

CAUTION: BEFORE YOU CLOSE THE CROSSFEED VALVE, MAKE SURE THAT THE FUEL PUMP(S) IS(ARE) OFF. THIS WILL PREVENT DAMAGE TO THE CROSSFEED VALVE.

(13) Fuel spill prevention:

NOTE: It is recommended that all the fuel pumps are switched off to do this procedure. It is permitted for the wing tank pumps to be switched on if there is minimum of 750 kg (1653.47 lb) of fuel in the related wing tank(s).

(a) In the cockpit, on fuel panel 40VU, make sure that:

The X FEED pushbutton switch 4QE is released (the OPEN legend is off)
The MODE SEL pushbutton switch 4QL is in the AUTO position (the MAN legend is off)
The CTR TK PUMP 1 (33QA) and CTR TK PUMP 2 (34QA) pushbutton switches are released (the OFF legends are on).

(14) Do a check of the ECAM indications as follows:
(a) On ECAM control panel 11VU, push the FUEL pushbutton switch:

On the ECAM lower display-unit, the FUEL page comes into view.

(b) On ECAM control panel 11VU, push the STS pushbutton switch:

On the ECAM lower display-unit, the STATUS page comes into view.

Subtask 28-25-00-860-095-E ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration

NOTE: After you complete the maintenance procedure that follows:

There is a risk of surge tank overflow if the MODE SEL (4QL) pushbutton switch stays in the MAN mode.

WARNING: MAKE SURE THAT YOU BOND THE FUEL TANKER TO THE AIRCRAFT. IF YOU DO NOT, AN ELECTRICAL DISCHARGE CAN OCCUR WHICH CAN CAUSE AN EXPLOSION OR FIRE.

(1) Obey the local regulations for grounding (earthing) the aircraft. If you must ground (earth) the aircraft:
(a) Ground (earth) the fuel tanker/pump unit and the aircraft correctly (Ref. AMM TASK 12-34-24-869-001).
(2) Bond the fuel tanker/pump unit to the aircraft (Ref. AMM TASK 12-34-24-869-001).
(3) Make sure that the wheel chocks are in their correct position:
(a) Move the aft Nose-Landing-Gear (NLG) wheel-chocks away from the tires.

NOTE: During the refuel, the NLG tires roll aft as the Main Landing-Gear (MLG) shock-absorbers compress.

(b) Make sure that the wheel chocks do not touch the MLG tires.

NOTE: The weight of the fuel can lower the aircraft and cause the tires to catch the wheel chocks.

(4) Make sure that the fuel lines and the related tanks that you examine for leaks are fully defueled and drained (Ref. AMM TASK 28-25-00-650-001), (Ref. AMM TASK 28-25-00-650-003) and (Ref. AMM TASK 28-25-00-650-005).
(5) Make sure that the fuel tank and the pipes in the maintenance are dry and closed (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 28-10-00-910-003).
(6) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE adjacent to refuel/defuel coupling 40QM.
(7) Remove refuel/defuel coupling-cap 41QM.
(8) Make sure that the hose coupling of the fuel tanker/pump unit is clean.

(9) Connect the hose coupling of the fuel tanker/pump unit to aircraft refuel/defuel coupling 40QM.
(10) Set the fuel tanker/pump unit to the refuel mode.
(11) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(12) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

CAUTION: BEFORE YOU CLOSE THE CROSSFEED VALVE, MAKE SURE THAT THE FUEL PUMP(S) IS(ARE) OFF. THIS WILL PREVENT DAMAGE TO THE CROSSFEED VALVE.

(13) Fuel spill prevention:

(a) In the cockpit, on fuel panel 40VU, make sure that:

The X FEED pushbutton switch 4QE is released (the OPEN legend is off)
The MODE SEL pushbutton switch 4QL is in the AUTO position (the MAN legend is off)
The CTR TK PUMP 1 (33QA) and CTR TK PUMP 2 (34QA) pushbutton switches are released (the OFF legends are on).

(14) Do a check of the ECAM indications as follows:
(a) On ECAM control panel 11VU, push the FUEL pushbutton switch:

On the ECAM lower display-unit, the FUEL page comes into view.

(b) On ECAM control panel 11VU, push the STS pushbutton switch:

On the ECAM lower display-unit, the STATUS page comes into view.

Subtask 28-25-00-010-097-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open access door 192MB.

Subtask 28-25-00-010-097-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below access door 622KB.
(2) Open access door 622KB.
(a) Put the doorstay into the doorstay bracket to hold access door 622KB in position.

4. Procedure
Subtask 28-25-00-790-050-A ** ON A/C NOT FOR ALL

A. Leak Check of the Refuel System
(1) On refuel/defuel panel 800VU:
(a) Set the REFUEL VALVES switches to the SHUT position.
(b) Make sure that the MODE SELECT switch is in the OFF and guarded position.
(2) Get access to the applicable fuel tanks (Ref. AMM TASK 28-10-00-910-002).
(3) Do a visual inspection of the applicable fuel pipes. Make sure that the fuel pipes are correctly installed.

CAUTION: DO NOT LET THE REFUEL PRESSURE BE MORE THAN THE MAXIMUM PRESSURE OF 50 PSI (3.45 BARS). IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE AIRCRAFT OR EQUIPMENT CAN OCCUR.

(4) Start the pump on the fuel tanker/pump unit and set the pressure to 40 psi (2.76 bar).
(5) On refuel/defuel panel 800VU, set the MODE SELECT switch to the REFUEL position.

NOTE: The fuel pipes are pressurized with fuel.

(6) Wait for 15 minutes.
(7) On refuel/defuel panel 800VU:
(a) Set the MODE SELECT switch to the OFF and guarded position.
(b) Set all the REFUEL VALVES switches to the NORM and guarded position.
(8) Stop the pump on the fuel tanker/pump unit.
(9) Get access to the applicable fuel tanks (Ref. AMM TASK 28-10-00-910-002).
(10) Make sure that there are no signs of fuel leakage from the applicable pipes.
(11) If you find signs of fuel leakage, remove and install the applicable pipes and do this test again.

Subtask 28-25-00-790-050-B ** ON A/C NOT FOR ALL

A. Leak Check of the Refuel System
(1) On REFUEL/DEFUEL panel 800VU:
(a) Set the REFUEL VALVES switches to the SHUT position.
(b) Make sure that the MODE SELECT switch is in OFF and guarded position.
(2) On refuel/defuel panel 801VU, set the REFUEL VALVES switchs to the SHUT position.
(3) Get access to the applicable fuel tanks (Ref. AMM TASK 28-10-00-910-002).
(4) Do a visual inspection of the applicable fuel pipes. Make sure that the fuel pipes are correctly installed.

CAUTION: DO NOT LET THE REFUEL PRESSURE BE MORE THAN THE MAXIMUM PRESSURE OF 50 PSI (3.45 BARS). IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE AIRCRAFT OR EQUIPMENT CAN OCCUR.

(5) Start the pump on the fuel tanker/pump unit and set the pressure to 40 psi (2.76 bar).
(6) On REFUEL/DEFUEL panel 800VU, set the MODE SELECT switch to the REFUEL position.

NOTE: The fuel pipes are pressurized with fuel.

(7) Wait for 15 minutes.
(8) On REFUEL/DEFUEL panel 800VU:
(a) Set the MODE SELECT switch to the OFF and guarded position.
(b) Set all the REFUEL VALVES switches to the NORM and guarded position.
(9) On REFUEL/DEFUEL panel 801VU, set the REFUEL VALVES switches to the NORM and guarded position.
(10) Stop the pump on the fuel tanker/pump unit.
(11) Get access to the applicable fuel tanks (Ref. AMM TASK 28-10-00-910-002).
(12) Make sure that there are no signs of fuel leakage from the applicable pipes.
(13) If you find signs of fuel leakage, remove and install the applicable pipes and do this test again.

5. Close-up
Subtask 28-25-00-410-092-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 192MB.

Subtask 28-25-00-410-092-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the doorstay from the doorstay bracket and close access door 622KB.

Subtask 28-25-00-860-096-A

B. Put the aircraft back to its initial 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) Disconnect the hose coupling of the fuel tanker/pump unit from aircraft refuel/defuel coupling 40QM.

CAUTION: MAKE SURE THAT THE HANDLE OF THE REFUEL COUPLING CAP POINTS AFT WHEN THE CAP IS CLOSED AND LOCKED.

(4) Install refuel/defuel coupling cap 41QM on refuel/defuel coupling 40QM.
(5) Disconnect these bonding/ground cables:

Between the aircraft and the fuel tanker/pump unit
If applicable, between the fuel tanker/pump unit and the ground
If applicable, between the aircraft and the ground.

Subtask 28-25-00-942-089-A

C. Removal of Equipment
(1) If you installed safety barriers, remove them.
(2) Remove the access platform(s).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 07:01:21 UTC