DOC AIRBUS | AMM A320FCenter-Tank Vapor-Seal-Membrane Repair
TASK 28-13-42-300-001-A
Center-Tank Vapor-Seal-Membrane Repair
To repair a damaged vapor seal membrane.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 28-13-42-941-051-A
Subtask 28-13-42-330-050-A
Subtask 28-13-42-410-052-A
[Rev.10 from 2021]
2026.04.02 07:02:11 UTC
Center-Tank Vapor-Seal-Membrane Repair
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobTo repair a damaged vapor seal membrane.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 2 | BRUSH - BRISTLED, FIBER, SOFT |
| No specific | 1 | PAPER-ABRASIVE(GRADE 100-150) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | TAPE - ADHESIVE |
| No specific | 1 | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.05LCA1) | Adhesive-Vapor Seal Fuel Tank - - |
| (Material No.05LCB1) | Adhesive-Vapor Seal Fuel Tank Viton dissolution - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.08BBD1) | Non Aqueous Cleaner-- Isopropyl Alcohol - |
| (Material No.08BBF1) | Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - |
| (Material No.13XGB1) | Laminate Repair Patch-Flexible membrane Fuel resistant High Temp. - |
| (Material No.14FAE1) | Abrasive-- Emery cloth - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191KB, 192KB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 28-13-42-000-001-A | Removal of the Vapor Seal |
| TASK 28-13-42-400-001-A | Installation of the Vapor Seal |
Vapour Seal - Repair SchemeSubtask 28-13-42-941-051-A
A. Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the air-conditioning system.
Subtask 28-13-42-865-053-A B. Open, safety and tag this(these) circuit breaker(s):
Subtask 28-13-42-010-054-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/FLOW/CTL &/IND1 | 1HB | D07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/FLOW/CTL AND IND/2 | 2HB | V21 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
C. Get Access
(1) Remove the access panels 191KB 192KB to get access to the vapor seal location.
(2) Removal of the damaged vapor seal
4. Procedure(1) Remove the access panels 191KB 192KB to get access to the vapor seal location.
(2) Removal of the damaged vapor seal
NOTE: It is acceptable to remove the vapor seal partially when access for repair of small damages is ensured from both sides.
(a) Remove the damaged vapor seal (Ref. AMM TASK 28-13-42-000-001). Subtask 28-13-42-330-050-A
A. Repair of the Vapor Seal Membrane
(1) Examine the installed vapor seal and the material to find what it is made of:
1 3 VI R20 and 3 V1 R20A are made of glass cloth soaked with epichlorohydrin attached on the tedlar poly-vinyl fluoride.
2 The tedlar face of 3 V1 R20 and 3 V1 R20A looks glossy and the epichlorohydrin face looks woven.
(b) Identify the vapor seal material (3 NX1 R20 (AERAZUR manufacturer)) as follows:
1 3 NX1 R20 is made of nomex soaked with epichlorohydrin attached on the tedlar PVF.
2 The tedlar face of 3 NX1 R20 looks glossy and the epichlorohydrin face looks woven.
(c) Identify the vapor seal material (865 fabric (manufacturer JEHIER)) as follows:
1 865 fabric is a nomex fabric with one face painted with viton.
2 The face looks matt.
(2) Repair the vapor seal (materials 3 V1 R20, 3 V1 R20A and 3 NX1 R20) as follows:
(a) Clean the vapor-seal repair area with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) On the damaged vapor seal:
1 Cut the damaged part of the vapor seal in the shape of a circle or rectangle.
2 Make a border of 30 mm (1.18 in.) around the repair cutout in the vapor seal.
3 Prepare the patch of the repair material (3 NX1 R20) to align the dimension of the identified repair area on the vapor seal.
4 Lightly rub the two repair surfaces that are to be connected with a Abrasive-- Emery cloth - (Material No.14FAE1) .
5 Clean the patch and the vapor seal again with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) .
(c) Prepare the adhesive compound as follows:
1 Fully mix the Adhesive-Vapor Seal Fuel Tank - - (Material No.05LCA1) (100 parts of CEMENT S-707 to 5 parts of HARDENER R by weight).
2 Let the adhesive compound dry for 10 minutes and then apply a second layer of the adhesive compound.
3 Let the second layer dry until it is not tacky.
4 Attach the patch to the vapor seal accurately above the prepared repair area.
5 Push the patch lightly into position with your fingers to prevent the air bubbles between the joint faces.
6 Apply the adhesive compound ( Adhesive-Vapor Seal Fuel Tank - - (Material No.05LCA1) ) on the repair contour.
(3) Repair the vapor seal (material 865 fabric) as follows:
(b) On the damaged vapor seal:
1 Cut the damaged part of the vapor seal in the shape of a circle or rectangle.
2 Make a border of 40 mm (1.57 in.) around the repair cutout in the vapor seal.
3 Prepare the patch of the repair material (865 fabric) to align the dimension of the identified repair area on the vapor seal.
4 Clean the patch and the vapor seal again with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
(c) Repair the vapor seal (small or moderate repair) as follows:
1 Apply adhesive Adhesive-Vapor Seal Fuel Tank Viton dissolution - (Material No.05LCB1) on the vapor seal membrane and the smooth face of the patch.
2 Let it dry as specified in Adhesive-Vapor Seal Fuel Tank Viton dissolution - (Material No.05LCB1) sheet.
3 Put the patch on the area to be repaired.
4 Put the patch above the vapor seal membrane:
a Apply heat with an iron or hot-air blow gun.
b Make sure that the temperature is 180 deg.C (356 deg.F).
6 If used, remove the TAPE - ADHESIVE.
Subtask 28-13-42-960-050-A (1) Examine the installed vapor seal and the material to find what it is made of:
NOTE: If the length of the damaged vapor seal is more than 127 mm (5.00 in.), you can replace the vapor seal.
NOTE: If the damage of the vapor seal is caused by a wrinkled area, you can replace the vapor seal. A repair of the vapor seal is not necessary when the areas of the vapor seal are wrinkled by thermal damage.
NOTE: All the materials have the same specifications but are of different chemical nature.
You can use the materials that follow to repair the vapor seal:
(a) Identify the vapor seal materials (3 V1 R20 (AERAZUR or SUPERFLEXIT manufacturer) and 3 V1 R20A (AERAZUR manufacturer)) as follows: You can use the materials that follow to repair the vapor seal:
- 3 NX 1 R20 material to repair the vapor seal membrane made of 3 V1 R20
- 3 NX 1 R20 material to repair the vapor seal membrane made of 3 V1 R20A
- 3 NX 1 R20 material to repair the vapor seal membrane made of 3 NX 1 R20
- 865 material to repair the vapor seal membrane made of 865 material.
1 3 VI R20 and 3 V1 R20A are made of glass cloth soaked with epichlorohydrin attached on the tedlar poly-vinyl fluoride.
2 The tedlar face of 3 V1 R20 and 3 V1 R20A looks glossy and the epichlorohydrin face looks woven.
(b) Identify the vapor seal material (3 NX1 R20 (AERAZUR manufacturer)) as follows:
1 3 NX1 R20 is made of nomex soaked with epichlorohydrin attached on the tedlar PVF.
2 The tedlar face of 3 NX1 R20 looks glossy and the epichlorohydrin face looks woven.
(c) Identify the vapor seal material (865 fabric (manufacturer JEHIER)) as follows:
1 865 fabric is a nomex fabric with one face painted with viton.
2 The face looks matt.
(2) Repair the vapor seal (materials 3 V1 R20, 3 V1 R20A and 3 NX1 R20) as follows:
(a) Clean the vapor-seal repair area with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) On the damaged vapor seal:
1 Cut the damaged part of the vapor seal in the shape of a circle or rectangle.
2 Make a border of 30 mm (1.18 in.) around the repair cutout in the vapor seal.
3 Prepare the patch of the repair material (3 NX1 R20) to align the dimension of the identified repair area on the vapor seal.
4 Lightly rub the two repair surfaces that are to be connected with a Abrasive-- Emery cloth - (Material No.14FAE1) .
5 Clean the patch and the vapor seal again with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) .
(c) Prepare the adhesive compound as follows:
1 Fully mix the Adhesive-Vapor Seal Fuel Tank - - (Material No.05LCA1) (100 parts of CEMENT S-707 to 5 parts of HARDENER R by weight).
NOTE: You can use 3M SCOTCHWELD 1099 as an alternative for CEMENT S-707.
NOTE: The life of the adhesive compound is approximately 2 hours.
(d) Do the repair of the vapor seal materials as follows: NOTE: You can connect the tedlar face of the patch (grey color) to the epichlorohydrin face of the vapor seal (black color).
1 Use the BRUSH - BRISTLED, FIBER, SOFT to apply the prepared adhesive compound ( Adhesive-Vapor Seal Fuel Tank - - (Material No.05LCA1) ) to the joint faces of the patch and the vapor seal. 2 Let the adhesive compound dry for 10 minutes and then apply a second layer of the adhesive compound.
3 Let the second layer dry until it is not tacky.
4 Attach the patch to the vapor seal accurately above the prepared repair area.
5 Push the patch lightly into position with your fingers to prevent the air bubbles between the joint faces.
6 Apply the adhesive compound ( Adhesive-Vapor Seal Fuel Tank - - (Material No.05LCA1) ) on the repair contour.
(3) Repair the vapor seal (material 865 fabric) as follows:
NOTE: If the repair material Adhesive-Vapor Seal Fuel Tank Viton dissolution - (Material No.05LCB1) and/or material 865 fabric ( Laminate Repair Patch-Flexible membrane Fuel resistant High Temp. - (Material No.13XGB1) ) is not available:
For heavy repair, you can replace the vapor seal (Ref. AMM TASK 28-13-42-000-001) and (Ref. AMM TASK 28-13-42-400-001).
(a) Clean the vapor-seal repair area with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .For heavy repair, you can replace the vapor seal (Ref. AMM TASK 28-13-42-000-001) and (Ref. AMM TASK 28-13-42-400-001).
(b) On the damaged vapor seal:
1 Cut the damaged part of the vapor seal in the shape of a circle or rectangle.
2 Make a border of 40 mm (1.57 in.) around the repair cutout in the vapor seal.
3 Prepare the patch of the repair material (865 fabric) to align the dimension of the identified repair area on the vapor seal.
4 Clean the patch and the vapor seal again with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
(c) Repair the vapor seal (small or moderate repair) as follows:
1 Apply adhesive Adhesive-Vapor Seal Fuel Tank Viton dissolution - (Material No.05LCB1) on the vapor seal membrane and the smooth face of the patch.
2 Let it dry as specified in Adhesive-Vapor Seal Fuel Tank Viton dissolution - (Material No.05LCB1) sheet.
3 Put the patch on the area to be repaired.
4 Put the patch above the vapor seal membrane:
a Apply heat with an iron or hot-air blow gun.
b Make sure that the temperature is 180 deg.C (356 deg.F).
NOTE: You can hold the patch in position on the vapor seal membrane with the TAPE - ADHESIVE on the edges.
5 Let it dry for a minimum of 24 hours.6 If used, remove the TAPE - ADHESIVE.
B. Replacement of the Attachment Fitting Seals of the Vapor Seal
(a) Clean the surface of the attachment points (1) on the structure with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Clean the fitting seals (2) and the seals (3) with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(c) Lightly rub the mating surface of the fitting seals (2) and the seals (3) with the PAPER-ABRASIVE(GRADE 100-150).
(2) Prepare the adhesive compound as follows:
(a) Fully mix the Adhesive-Vapor Seal Fuel Tank - - (Material No.05LCA1) , (100 parts of CEMENT S-707 to 5 parts of HARDENER R by weight).
(b) Apply a thin layer of the adhesive compound to the surface of the fitting seals (2) and the seals (3).
(c) Let the adhesive compound dry for 10 minutes and then apply a second layer of adhesive compound.
(d) Let the second layer dry until it is not tacky.
(e) Put the fitting seals (2) and the seals (3) in position on the attachment points (1).
(f) Lightly push the fitting seals (2) and the seals (3) with your fingers to remove the air pockets.
(g) Hold the fitting seals (2) and seals (3) in position with the TAPE - ADHESIVE.
5. Close-upNOTE: If possible, install the seals with the rough side of the seal on the structure. The installation of the seals with the smooth side on the structure is necessary. If the surface of the seal is smooth on the two sides.
(1) Prepare the surfaces of the components as follows: (a) Clean the surface of the attachment points (1) on the structure with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Clean the fitting seals (2) and the seals (3) with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(c) Lightly rub the mating surface of the fitting seals (2) and the seals (3) with the PAPER-ABRASIVE(GRADE 100-150).
(2) Prepare the adhesive compound as follows:
(a) Fully mix the Adhesive-Vapor Seal Fuel Tank - - (Material No.05LCA1) , (100 parts of CEMENT S-707 to 5 parts of HARDENER R by weight).
NOTE: You can use 3M SCOTCHWELD 1099 as an alternative for CEMENT S-707.
NOTE: The life of the adhesive compound is approximately 2 hours.
(3) Bond the seals to the attachment points on the structure as follows: NOTE: You can use the BRUSH - BRISTLED, FIBER, SOFT to apply the adhesive compound.
(a) Apply a thin layer of the adhesive compound to the surface of the attachment points (1). (b) Apply a thin layer of the adhesive compound to the surface of the fitting seals (2) and the seals (3).
(c) Let the adhesive compound dry for 10 minutes and then apply a second layer of adhesive compound.
(d) Let the second layer dry until it is not tacky.
(e) Put the fitting seals (2) and the seals (3) in position on the attachment points (1).
(f) Lightly push the fitting seals (2) and the seals (3) with your fingers to remove the air pockets.
(g) Hold the fitting seals (2) and seals (3) in position with the TAPE - ADHESIVE.
NOTE: The adhesive compound becomes fully dry in approximately 24 hours.
(h) Remove the TAPE - ADHESIVE from the fitting seals (2) and the seals (3). Subtask 28-13-42-410-052-A
A. Close Access
(1) Install the vapor seal (Ref. AMM TASK 28-13-42-400-001).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install the access panels 191KB 192KB.
(4) Remove the WARNING NOTICE(S).
Subtask 28-13-42-865-054-A (1) Install the vapor seal (Ref. AMM TASK 28-13-42-400-001).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install the access panels 191KB 192KB.
(4) Remove the WARNING NOTICE(S).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/FLOW/CTL &/IND1 | 1HB | D07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/FLOW/CTL AND IND/2 | 2HB | V21 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/115VAC | 21HH | W22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/2/28VDC | 23HH | W21 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/115VAC | 1HH | X22 |
| 122VU | AIR COND/PACK TEMP/CTL SYS1/1/28VDC | 3HH | X21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/28VDC | 24HH | Y21 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/2/115VAC | 22HH | Y20 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/28VDC | 4HH | Y19 |
| 122VU | AIR COND/PACK TEMP CTL SYS2/1/115VAC | 2HH | Y18 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/115VAC | 53HH | W22 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN A/28VDC | 55HH | W21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/28VDC | 56HH | Y21 |
| 122VU | AIR COND/TEMP CTL SYS 2/CHAN B/115VAC | 54HH | Y20 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |