DOC AIRBUS | AMM A320FTemporary External Repair of the Fuel Tank
TASK 51-76-12-300-003-A
Temporary External Repair of the Fuel Tank
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 51-76-12-941-052-A
Subtask 51-76-12-110-052-A
Subtask 51-76-12-914-052-A
(2) Inspect the area around the fastener(s) that leaks for cracks.
(3) Put all the contents of the two bags (sealant and accelerator) Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on a mixing palette. Mix the light and dark compounds together until you get an even color.
(4) Apply a small amount of mixed sealant Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the center of the click patch. Remove the outer protective tape. Keep the mixing spatula with the remaining sealant mix to measure the curing time.
(5) Put the click patch over the center of the fastener that leaks and push the outer edges firmly on the wing surface.
(6) Push the click patch center to start the click mechanism. This will force the click patch and sealant on the repair area.
(7) Let the sealant to cure. Examine the remaining sealant mix to make sure that the sealant is fully cured.
(8) Hold the click patch cover by the edge and carefully remove it. Make sure that the click patch stays firmly attached to the wing surface. Remove any unwanted sealant.
(9) Refuel the tank (Ref. AMM TASK 12-11-28-650-004) and examine the repair for leaks.
(10) If the click patch does not stop the leak, continue as follows:
(b) Use a SCRAPER - NON METALLIC and a Textile-Lint free Cotton - (Material No.14SBA1) with Non Aqueous Cleaner-General - - (Material No.08BAA9) to carefully remove all signs of sealant from the wing surface.
(c) Do a permanent fuel leak repair SRM 517612.
(d) Repair the surface finish as necessary.
5. Close-up
Subtask 51-76-12-942-052-A
[Rev.10 from 2021]
2026.04.01 01:34:48 UTC
Temporary External Repair of the Fuel Tank
WARNING:
MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND RELATED DOORS
- COMPONENTS THAT MOVE.
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:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobNOTE: A permanent repair is necessary at the maintenance interval or before 600FH.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | SCRAPER - NON METALLIC |
| No specific | 1 | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.06ABA1) | Polysulfide Sealant-Fuel Tank Brushable - |
| (Material No.06ABF1) | Polysulfide Sealant-Fuel Tank Quick Curing - |
| (Material No.06JAJ1) | Solid Sealant-Fuel Tank Temp. Repair Stick - |
| (Material No.06PAG1) | Adhesion Promoter-For Polysulfide Sealant - - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14FAB1) | Abrasive-- Scotch Brite Pads - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| (Material No.14TAF1) | Article-- Fuel Tank Click-Patch - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-11-28-650-004-A | Pressure Refuel with Manual Control |
| TASK 28-00-00-910-001-A | Fuel Safety Procedures |
| TASK 28-10-00-910-002-A | Access to the Fuel Tanks and the Work Areas |
| TASK 28-11-00-280-002-A | Structural Fuel Tank Leaks - General Information |
| TASK 28-25-00-650-001-A | Pressure Defuel |
| SRM 517612 |
Subtask 51-76-12-941-052-A
A. Safety Precautions
(1) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the fuel system.
(2) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001) and (Ref. AMM TASK 28-10-00-910-002).
Subtask 51-76-12-010-052-A (1) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the fuel system.
(2) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001) and (Ref. AMM TASK 28-10-00-910-002).
B. Get Access
(1) Get access to the fuel leak area.
Subtask 51-76-12-280-050-A (1) Get access to the fuel leak area.
C. Calculate the leak rate (Ref. AMM TASK 28-11-00-280-002) and make sure that a temporary repair is permitted.
4. ProcedureSubtask 51-76-12-110-052-A
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
A. Prepare the Repair Area NOTE: Before you clean the repair area, use Abrasive-- Scotch Brite Pads - (Material No.14FAB1) to lightly abrade the repair surface.
(1) Clean the repair area with the Non Aqueous Cleaner-General - - (Material No.08BAA9) and a clean lint-free cloth Textile-Lint free Cotton - (Material No.14SBA1) to remove all signs of fuel, hydraulic fluid, grease and jointing compound from the repair area. B. External Repair of the Fuel Tank with Sealant
(1) Apply the adhesion promoter Adhesion Promoter-For Polysulfide Sealant - - (Material No.06PAG1) to the leak area.
(3) If you cannot get a good seal, defuel the aircraft to below the leak level (Ref. AMM TASK 28-25-00-650-001).
(4) Apply a second coat of the Solid Sealant-Fuel Tank Temp. Repair Stick - (Material No.06JAJ1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) .
(5) Let the repair cure.
(6) Refuel the aircraft above the level of the repair (Ref. AMM TASK 12-11-28-650-004) and examine the fuel tank for leaks.
Subtask 51-76-12-360-050-A (1) Apply the adhesion promoter Adhesion Promoter-For Polysulfide Sealant - - (Material No.06PAG1) to the leak area.
NOTE: You can apply the adhesion promoter Adhesion Promoter-For Polysulfide Sealant - - (Material No.06PAG1) , if available.
(2) Apply the Solid Sealant-Fuel Tank Temp. Repair Stick - (Material No.06JAJ1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to the leak area. Push the sealant into the leak source with a SCRAPER - NON METALLIC until the leak stops. (3) If you cannot get a good seal, defuel the aircraft to below the leak level (Ref. AMM TASK 28-25-00-650-001).
(4) Apply a second coat of the Solid Sealant-Fuel Tank Temp. Repair Stick - (Material No.06JAJ1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) .
(5) Let the repair cure.
(6) Refuel the aircraft above the level of the repair (Ref. AMM TASK 12-11-28-650-004) and examine the fuel tank for leaks.
NOTE: Leaks are not permitted.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT TIGHTEN THE FASTENER(S) TO REPAIR THE LEAK. IF YOU DO, YOU CAN MAKE THE FUEL LEAKAGE WORSE.
C. External Repair of the Fuel Tank using a Click Patch Kit NOTE: Use only the click patch kit Article-- Fuel Tank Click-Patch - (Material No.14TAF1) to seal the external fastener(s) on a flat wing.
(1) If necessary, defuel the tank sufficiently to stop the fuel flow at the fastener(s) that leaks (Ref. AMM TASK 28-25-00-650-001). (2) Inspect the area around the fastener(s) that leaks for cracks.
(3) Put all the contents of the two bags (sealant and accelerator) Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on a mixing palette. Mix the light and dark compounds together until you get an even color.
(4) Apply a small amount of mixed sealant Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the center of the click patch. Remove the outer protective tape. Keep the mixing spatula with the remaining sealant mix to measure the curing time.
(5) Put the click patch over the center of the fastener that leaks and push the outer edges firmly on the wing surface.
(6) Push the click patch center to start the click mechanism. This will force the click patch and sealant on the repair area.
(7) Let the sealant to cure. Examine the remaining sealant mix to make sure that the sealant is fully cured.
(8) Hold the click patch cover by the edge and carefully remove it. Make sure that the click patch stays firmly attached to the wing surface. Remove any unwanted sealant.
(9) Refuel the tank (Ref. AMM TASK 12-11-28-650-004) and examine the repair for leaks.
(10) If the click patch does not stop the leak, continue as follows:
NOTE: Leaks are not permitted.
(a) Use a SCRAPER - NON METALLIC to carefully lift the edge of the click patch from the wing surface. Hold the edge of the click patch and carefully remove its from the wing surface. (b) Use a SCRAPER - NON METALLIC and a Textile-Lint free Cotton - (Material No.14SBA1) with Non Aqueous Cleaner-General - - (Material No.08BAA9) to carefully remove all signs of sealant from the wing surface.
(c) Do a permanent fuel leak repair SRM 517612.
(d) Repair the surface finish as necessary.
Subtask 51-76-12-942-052-A
A. Put the aircraft back to its initial configuration.
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.