DOC AIRBUS | AMM A320FDetailed Inspection of Vapour Seal (SFAR88)
TASK 28-18-00-200-001-A
Detailed Inspection of Vapour Seal (SFAR88)
Refer to the MPD TASK: 281800-02
DETAILED INSPECTION OF VAPOUR SEAL (SFAR88)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 28-18-00-941-051-A
Subtask 28-18-00-210-050-B
Subtask 28-18-00-410-051-A
[Rev.10 from 2021]
2026.04.02 06:17:18 UTC
Detailed Inspection of Vapour Seal (SFAR88)
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
1. Reason for the Job- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
Refer to the MPD TASK: 281800-02
DETAILED INSPECTION OF VAPOUR SEAL (SFAR88)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | LIGHT SOURCE - INSPECTION |
| No specific | AR | MIRROR - INSPECTION |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191 | AIR CONDITIONING COMPT AND FAIRINGS |
| 192 | AIR CONDITIONING COMPT AND FAIRINGS |
| 191KB, 192KB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-20-00-010-001-A | Removal of the Air-Conditioning Distribution Ducts |
| TASK 21-20-00-410-001-A | Installation of the Air-Conditioning Distribution Ducts |
| TASK 21-51-41-000-001-A | Removal of the Ozone Filter |
| TASK 21-51-41-400-001-A | Installation of the Ozone Filter |
| TASK 21-51-51-000-001-A | Removal of the Pack Flow-Control Valve/ Pack Flow-Control Unit |
| TASK 21-51-51-400-001-A | Installation of the Pack Flow-Control Valve/Pack Flow-Control Unit |
| TASK 21-52-41-000-001-A | Removal of the Air Conditioning Pack |
| TASK 21-52-41-400-001-A | Installation of the Air Conditioning Pack |
| TASK 28-13-42-000-001-A | Removal of the Vapor Seal |
| TASK 28-13-42-400-001-A | Installation of the Vapor Seal |
| TASK 36-12-41-000-001-A | Removal of a Bleed-Air Duct |
| TASK 36-12-41-400-001-A | Installation of a Bleed-Air Duct |
| TASK 36-22-18-000-001-A | Removal of the Fuselage Overheat Sensing-Elements (Loop A and B) |
| TASK 36-22-18-400-001-A | Installation of the Fuselage Overheat Sensing-Elements (Loop A and B) |
| TASK 53-35-13-000-002-A | Removal of the Quick-Release Access Panels from the Belly Fairing Structure |
| TASK 53-35-13-400-002-A | Installation of the Quick-Release Access Panels on the Belly Fairing Structure |
| TASK 28-13-42-300-001-A | Center-Tank Vapor-Seal-Membrane Repair (for corrective action) |
Retainer Upper and Lower Seal - Location and DetailSubtask 28-18-00-941-051-A
A. Aircraft Maintenance Configuration
(1) Put the SAFETY BARRIER(S) in position.
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the air-conditioning system.
Subtask 28-18-00-865-050-A (1) Put the SAFETY BARRIER(S) in position.
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the air-conditioning system.
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 28-18-00-010-051-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) On the lower fuselage, remove access panel 191KB ( 192KB) to get access to the vapor seal location (Ref. AMM TASK 53-35-13-000-002).
(2) If necessary, remove the components that follow:
(a) Remove air conditioning-packs 10HM (11HM) from the aircraft (Ref. AMM TASK 21-52-41-000-001).
(b) Remove pack flow-control-valves 8HB (11HB) from the aircraft (Ref. AMM TASK 21-51-51-000-001).
(c) Remove ozone filter 100HM (101HM) (Ref. AMM TASK 21-51-41-000-001).
(d) Remove the hot trim-air duct (Ref. AMM TASK 21-20-00-010-001).
(e) Remove the overheat detection loops A and B from the heat shields and from the APU bleed-air ducts (Ref. AMM TASK 36-22-18-000-001).
(f) Remove the APU bleed-air ducts (Ref. AMM TASK 36-12-41-000-001).
4. Procedure(1) On the lower fuselage, remove access panel 191KB ( 192KB) to get access to the vapor seal location (Ref. AMM TASK 53-35-13-000-002).
(2) If necessary, remove the components that follow:
(a) Remove air conditioning-packs 10HM (11HM) from the aircraft (Ref. AMM TASK 21-52-41-000-001).
(b) Remove pack flow-control-valves 8HB (11HB) from the aircraft (Ref. AMM TASK 21-51-51-000-001).
(c) Remove ozone filter 100HM (101HM) (Ref. AMM TASK 21-51-41-000-001).
(d) Remove the hot trim-air duct (Ref. AMM TASK 21-20-00-010-001).
(e) Remove the overheat detection loops A and B from the heat shields and from the APU bleed-air ducts (Ref. AMM TASK 36-22-18-000-001).
(f) Remove the APU bleed-air ducts (Ref. AMM TASK 36-12-41-000-001).
Subtask 28-18-00-210-050-B
A. Detailed Inspection of Vapor Seal (Aircraft Fitted with a Center Tank)
(1) Examine the vapor seal for tears, cracks, holes, scratches, deformation and wrinkled areas:
1 Make sure that the vapor seal has no wrinkled areas.
(b) If you find wrinkled areas on the vapor seal, replace the vapor seal membrane (Ref. AMM TASK 28-13-42-000-001) and (Ref. AMM TASK 28-13-42-400-001).
1 Do not remove the retainer during the inspection of the upper seal for cracks.
2 Do an inspection of the upper seal on the adjacent area of the retainer.
(e) Examine the lower seal for cracks:
1 Do not remove the retainer during the inspection of the lower seal for cracks.
2 Do an inspection of the lower seal on the adjacent area of the retainer.
5. Close-up(1) Examine the vapor seal for tears, cracks, holes, scratches, deformation and wrinkled areas:
NOTE: Use a MIRROR - INSPECTION and a sufficient LIGHT SOURCE - INSPECTION for this inspection.
(a) On the vapor seal, near to the heat shields above the Pack Flow-Control Valves: 1 Make sure that the vapor seal has no wrinkled areas.
(b) If you find wrinkled areas on the vapor seal, replace the vapor seal membrane (Ref. AMM TASK 28-13-42-000-001) and (Ref. AMM TASK 28-13-42-400-001).
NOTE: No repair is permitted for this damage.
NOTE: It is permitted to use a new vapor seal with signs of wrinkles on the top surface. The wrinkles can occur because of the storage conditions.
(c) If you find deformation on the vapor seal, replace the vapor seal membrane (Ref. AMM TASK 28-13-42-000-001) and (Ref. AMM TASK 28-13-42-400-001). NOTE: No repair is permitted for this damage.
(d) Examine the upper seal for cracks: 1 Do not remove the retainer during the inspection of the upper seal for cracks.
2 Do an inspection of the upper seal on the adjacent area of the retainer.
(e) Examine the lower seal for cracks:
1 Do not remove the retainer during the inspection of the lower seal for cracks.
2 Do an inspection of the lower seal on the adjacent area of the retainer.
NOTE: Some cracks on the lower seal found between membrane and retainers are permitted. These parts will have to be replaced at the subsequent vapor seal installation.
NOTE: Cracks on the lower seal are out of the permitted tolerance if:
(2) If you find damage on the vapor seal or at the attachments, do the applicable repair procedure (Ref. AMM TASK 28-13-42-300-001). - Segments across the full width of the lower vapor seal fall off.
This damage can cause the retainers to touch the vapor seal and can have an effect on all the vapor seal system.
Subtask 28-18-00-410-051-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) If necessary, install the components that follow:
(a) Install the APU bleed-air ducts to the center-tank lower surface (Ref. AMM TASK 36-12-41-400-001).
(b) Install the overheat detection loops A and B on the heat shields and on the APU bleed-air ducts (Ref. AMM TASK 36-22-18-400-001).
(c) Install the hot trim-air duct (Ref. AMM TASK 21-20-00-410-001).
(d) Install ozone filters 100HM (101HM) (Ref. AMM TASK 21-51-41-400-001).
(e) Install pack flow-control-valves 8HB (11HB) (Ref. AMM TASK 21-51-51-400-001).
(f) Install air conditioning-packs 10HM (11HM) (Ref. AMM TASK 21-52-41-400-001).
(3) Install access panel 191KB ( 192KB) to the aircraft (Ref. AMM TASK 53-35-13-400-002).
Subtask 28-18-00-865-051-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) If necessary, install the components that follow:
(a) Install the APU bleed-air ducts to the center-tank lower surface (Ref. AMM TASK 36-12-41-400-001).
(b) Install the overheat detection loops A and B on the heat shields and on the APU bleed-air ducts (Ref. AMM TASK 36-22-18-400-001).
(c) Install the hot trim-air duct (Ref. AMM TASK 21-20-00-410-001).
(d) Install ozone filters 100HM (101HM) (Ref. AMM TASK 21-51-41-400-001).
(e) Install pack flow-control-valves 8HB (11HB) (Ref. AMM TASK 21-51-51-400-001).
(f) Install air conditioning-packs 10HM (11HM) (Ref. AMM TASK 21-52-41-400-001).
(3) Install access panel 191KB ( 192KB) to the aircraft (Ref. AMM TASK 53-35-13-400-002).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 28-18-00-942-051-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. Removal of Equipment
(1) Remove the WARNING NOTICE(S).
(2) Remove the safety barrier(s).
(3) Make sure that the work area is clean and clear of tools and other items.
(1) Remove the WARNING NOTICE(S).
(2) Remove the safety barrier(s).
(3) Make sure that the work area is clean and clear of tools and other items.