DOC AIRBUS | AMM A320FLeak Test of the Fuel Tanks - Without Fuel - Helium Procedure
TASK 28-11-00-790-009-A
Leak Test of the Fuel Tanks - Without Fuel - Helium Procedure
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 28-11-00-941-089-A
Subtask 28-11-00-790-070-A
Subtask 28-11-00-410-075-B ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 07:21:14 UTC
Leak Test of the Fuel Tanks - Without Fuel - Helium Procedure
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 6M (20 FT) |
| No specific | AR | BAG - PLASTIC |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | WARNING NOTICE(S) |
| 102-01171 | 1 | KIT-HELIUM DETECTION |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.05RAB9) | Adhesive Film Tape-- Aluminium Foil - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-11-28-650-003-A | Pressure Refuel with Automatic Control |
| TASK 27-50-00-866-008-A | Extension of the Flaps on the Ground |
| TASK 27-50-00-866-008-A-01 | Extension of the Flaps/Slats on the Ground |
| TASK 27-50-00-866-009-A | Retraction of the Flaps on the Ground |
| TASK 27-50-00-866-009-A-01 | Retraction of the Flaps/Slats on the Ground |
| 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 28-11-00-790-802-A | Leak Test of the Wing Tanks and the Center Tank - Without Fuel - Pressurized Air and Helium/Air Procedure |
| 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 51-76-12-300-001-A | Local Repair of the Fuel Tank Sealant |
| TASK 57-17-11-000-001-A | Removal of Access Cover 147AZ(148AZ) |
| TASK 57-17-11-000-001-B | Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door |
| TASK 57-17-11-400-001-A | Installation of Access Cover 147AZ(148AZ) |
| TASK 57-17-11-400-001-B | Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door |
| TASK 57-27-11-000-001-A | Removal of the Access Panel |
| TASK 57-27-11-000-002-A | Removal of the Access Panel |
| TASK 57-27-11-400-001-A | Installation of the Access Panel |
| TASK 57-27-11-400-002-A | Installation of the Access Panel |
Test Equipment (Helium Procedure) - InstallationSubtask 28-11-00-941-089-A
A. Safety Precautions
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
(3) Put the SAFETY BARRIER(S) in position.
Subtask 28-11-00-860-074-A 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.
(1) You must obey the fuel safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001). (2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
(3) Put the SAFETY BARRIER(S) in position.
B. Aircraft Maintenance Configuration
(1) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
(2) Drain the remaining fuel from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) If necessary, extend the flaps fully (Ref. AMM TASK 27-50-00-866-008).
Subtask 28-11-00-010-076-B ** ON A/C NOT FOR ALL (1) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
(2) Drain the remaining fuel from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) If necessary, extend the flaps fully (Ref. AMM TASK 27-50-00-866-008).
C. Get Access
(1) Put the ACCESS PLATFORM 6M (20 FT) in position below the applicable access panel.
(2) Remove the applicable access panels.
(a) To get access to the front of the fuel tank, remove the applicable wing leading-edge access panels.
(b) To get access to the rear of the fuel tank, remove the applicable wing trailing-edge access panels.
(c) To get access to the center tank, remove the applicable belly fairing access panel.
(3) If applicable, remove the fuel tank access panels (Ref. AMM TASK 57-17-11-000-001), (Ref. AMM TASK 57-27-11-000-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 28-10-00-910-002).
Subtask 28-11-00-010-076-D ** ON A/C NOT FOR ALL (1) Put the ACCESS PLATFORM 6M (20 FT) in position below the applicable access panel.
(2) Remove the applicable access panels.
(a) To get access to the front of the fuel tank, remove the applicable wing leading-edge access panels.
(b) To get access to the rear of the fuel tank, remove the applicable wing trailing-edge access panels.
(c) To get access to the center tank, remove the applicable belly fairing access panel.
(3) If applicable, remove the fuel tank access panels (Ref. AMM TASK 57-17-11-000-001), (Ref. AMM TASK 57-27-11-000-002), (Ref. AMM TASK 57-27-11-000-001) and (Ref. AMM TASK 28-10-00-910-002).
C. Get Access
(1) Put the ACCESS PLATFORM 6M (20 FT) in position below the applicable access panel.
(2) Remove the applicable access panels.
(a) To get access to the front of the fuel tank, remove the applicable wing leading-edge access panels.
(b) To get access to the rear of the fuel tank, remove the applicable wing trailing-edge access panels.
(c) To get access to the center tank, remove the applicable belly fairing access panel.
(3) If applicable, remove the fuel tank access panels (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002).
(4) If applicable, remove the fuel tank access panel (Ref. AMM TASK 57-17-11-000-001) and (Ref. AMM TASK 28-10-00-910-002).
Subtask 28-11-00-010-076-E ** ON A/C NOT FOR ALL (1) Put the ACCESS PLATFORM 6M (20 FT) in position below the applicable access panel.
(2) Remove the applicable access panels.
(a) To get access to the front of the fuel tank, remove the applicable wing leading-edge access panels.
(b) To get access to the rear of the fuel tank, remove the applicable wing trailing-edge access panels.
(c) To get access to the center tank, remove the applicable belly fairing access panel.
(3) If applicable, remove the fuel tank access panels (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002).
(4) If applicable, remove the fuel tank access panel (Ref. AMM TASK 57-17-11-000-001) and (Ref. AMM TASK 28-10-00-910-002).
C. Get Access
(1) Put the ACCESS PLATFORM 6M (20 FT) in position below the applicable access panel.
(2) Remove the applicable access panels.
(a) To get access to the front of the fuel tank, remove the applicable wing leading-edge access panels.
(b) To get access to the rear of the fuel tank, remove the applicable wing trailing-edge access panels.
(c) To get access to the center tank, remove the applicable belly fairing access panel.
(3) If applicable, remove the fuel tank access panels (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-17-11-000-001), (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002).
Subtask 28-11-00-480-054-A (1) Put the ACCESS PLATFORM 6M (20 FT) in position below the applicable access panel.
(2) Remove the applicable access panels.
(a) To get access to the front of the fuel tank, remove the applicable wing leading-edge access panels.
(b) To get access to the rear of the fuel tank, remove the applicable wing trailing-edge access panels.
(c) To get access to the center tank, remove the applicable belly fairing access panel.
(3) If applicable, remove the fuel tank access panels (Ref. AMM TASK 57-27-11-000-001), (Ref. AMM TASK 57-17-11-000-001), (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002).
D. Installation of Test Equipment
(2) On the external surface of the fuel tank, attach a suitable artificial compression chamber along the leak area with:
(4) Connect the helium pipe to the control unit (1).
(5) Connect the helium supply to the control unit (1).
4. ProcedureNOTE: Use the applicable items from the102-01171 KIT-HELIUM DETECTION to install the test equipment.
(1) Make sure the area around the leak is clean and dry. (2) On the external surface of the fuel tank, attach a suitable artificial compression chamber along the leak area with:
- Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) .
NOTE: The artificial compression chamber is made from a suitable BAG - PLASTIC.
(3) Attach the helium pipe to the artificial compression chamber with Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) . (4) Connect the helium pipe to the control unit (1).
(5) Connect the helium supply to the control unit (1).
NOTE: Airbus recommends that industrial helium of 97 percent concentration is used for the leak test.
Subtask 28-11-00-790-070-A
A. Leak Test of the Fuel Tanks - Without Fuel - Helium Procedure
(1) Set the control unit (1) to supply the helium to the artificial compression chamber.
(2) Operate the control unit (1) to start the test.
(4) Inside the tank, use the leak detector to find the internal leak point. Start at a position that is opposite the external leak and move the detector along adjacent stringers and ribs. Do this until the exit for the helium is found.
(6) Do a leak test to make sure that the leak is repaired (Ref. AMM TASK 28-11-00-790-802).
5. Close-up(1) Set the control unit (1) to supply the helium to the artificial compression chamber.
(2) Operate the control unit (1) to start the test.
NOTE: The system will automatically increase the pressure to 0.2 bar (2.90 psi).
(3) Check the artificial compression chamber and seal all the helium leaks with the aluminum tape. (4) Inside the tank, use the leak detector to find the internal leak point. Start at a position that is opposite the external leak and move the detector along adjacent stringers and ribs. Do this until the exit for the helium is found.
NOTE: A fuel leak can track for a long distance in the aircraft structure.
(5) Do the necessary repair procedure (Ref. AMM TASK 51-76-12-300-001). (6) Do a leak test to make sure that the leak is repaired (Ref. AMM TASK 28-11-00-790-802).
Subtask 28-11-00-410-075-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) Install the applicable fuel tank access panels (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 57-17-11-400-001).
(3) If applicable, install the wing leading-edge access panels.
(4) If applicable, install the wing trailing-edge access panels.
(5) If applicable, install the belly fairing access panels.
Subtask 28-11-00-410-075-D ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable fuel tank access panels (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 57-17-11-400-001).
(3) If applicable, install the wing leading-edge access panels.
(4) If applicable, install the wing trailing-edge access panels.
(5) If applicable, install the belly fairing access panels.
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable fuel tank access panels (Ref. AMM TASK 57-27-11-400-001) (Ref. AMM TASK 57-27-11-400-002).
(3) If applicable install access panel 148AZ (Ref. AMM TASK 57-17-11-400-001).
(4) If applicable, install the wing leading-edge access panels.
(5) If applicable, install the wing trailing-edge access panels.
(6) If applicable, install the belly fairing access panels.
Subtask 28-11-00-410-075-E ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable fuel tank access panels (Ref. AMM TASK 57-27-11-400-001) (Ref. AMM TASK 57-27-11-400-002).
(3) If applicable install access panel 148AZ (Ref. AMM TASK 57-17-11-400-001).
(4) If applicable, install the wing leading-edge access panels.
(5) If applicable, install the wing trailing-edge access panels.
(6) If applicable, install the belly fairing access panels.
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable fuel tank access panels (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 57-17-11-400-001).
(3) If applicable, install the wing leading-edge access panels.
(4) If applicable, install the wing trailing-edge access panels.
(5) If applicable, install the belly fairing access panels.
Subtask 28-11-00-860-075-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable fuel tank access panels (Ref. AMM TASK 57-27-11-400-001), (Ref. AMM TASK 57-27-11-400-002) and (Ref. AMM TASK 57-17-11-400-001).
(3) If applicable, install the wing leading-edge access panels.
(4) If applicable, install the wing trailing-edge access panels.
(5) If applicable, install the belly fairing access panels.
B. Aircraft Maintenance Configuration
(1) Refuel the applicable fuel tanks (Ref. AMM TASK 12-11-28-650-003).
(2) If applicable, retract the flaps fully (Ref. AMM TASK 27-50-00-866-009).
Subtask 28-11-00-942-095-A (1) Refuel the applicable fuel tanks (Ref. AMM TASK 12-11-28-650-003).
(2) If applicable, retract the flaps fully (Ref. AMM TASK 27-50-00-866-009).
C. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(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.
(1) Remove the SAFETY BARRIER(S).
(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.