DOC AIRBUS | AMM A320FInstallation of the Avionics-Ventilation Skin Air-Outlet-Valve
TASK 21-26-53-400-001-A-01
Installation of the Avionics-Ventilation Skin Air-Outlet-Valve
This task is alternative and temporary and it must be used when the cure time is not sufficient before the aircraft dispatch.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 21-26-53-420-052-A
Subtask 21-26-53-942-051-A
[Rev.10 from 2021]
2026.04.02 06:11:09 UTC
Installation of the Avionics-Ventilation Skin Air-Outlet-Valve
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis task is alternative and temporary and it must be used when the cure time is not sufficient before the aircraft dispatch.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.05RAB9) | Adhesive Film Tape-- Aluminium Foil - |
| (Material No.06AEB2) | Polysulfide Sealant-Low Adhesion Fillet Structure |
| (Material No.08ABC1) | Aqueous Cleaner-Aircraft Exterior Pressure Spraying - |
| (Material No.08BBE1) | Non Aqueous Cleaner-- Methyl Alcohol - |
| (Material No.14DAB1) | Release Agent-- Water Base - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 126 | LATERAL AVIONIC COMPARTMENT |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 5 | O-RING | AIPC 21-26-01-15-030 |
| 5 | O-RING | AIPC 21-26-81-15-030 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 21-26-00-710-001-A | Operational Check of the Avionics Equipment Ventilation-System via MCDU |
| TASK 21-26-00-710-001-A-01 | Operational Check of the Avionics Equipment Ventilation (without the CFDS) |
| TASK 21-26-53-000-002-A | Removal of the Skin Air Outlet-Valve |
| TASK 21-26-53-400-001-A | Installation of the Skin Air Outlet-Valve |
| TASK 21-26-53-400-001-A-01 | Installation of the Avionics-Ventilation Skin Air-Outlet-Valve |
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
Skin Air Outlet-ValveCAUTION:
USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
Subtask 21-26-53-860-051-A A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position on the right side of the aircraft, below the valve.
Subtask 21-26-53-865-055-A (1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position on the right side of the aircraft, below the valve.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
Subtask 21-26-53-420-052-A
A. Installation of the Skin Air-Outlet Valve
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the deactivation switch of the valve (2) is in the ON position.
(4) Remove the blanking plug from the air outlet.
(5) Apply sealants:
(7) Remove the CAP-BLANKING from each electrical connector and receptacle.
(8) Make sure that all the electrical connections are clean and in the correct condition.
(9) Connect the electrical connector (6).
(10) Install the valve (2).
(11) Install the screws (3) and (4) and tighten them.
(12) Do the bonding with the screw at the top and the screw at the bottom (Ref. AMM TASK 20-28-00-912-802).
(13) Make sure that you also apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) into the peripheral clearance between the edge of the valve (2) and the aircraft structure.
(a) Put Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) between the valve (2) and the aircraft structure. After the sealant is no longer tacky, do as follows:
2 Put an applicable length strip of Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) along the edge of the valve (2) and the aircraft structure.
3 Put overlap strips of the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) around the valve (2) to make sure that the surface is smooth. The minimum overlap length of the applied Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) is 25 mm (1 in.).
4 Make sure that there is no Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) :
Subtask 21-26-53-210-051-A (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the deactivation switch of the valve (2) is in the ON position.
(4) Remove the blanking plug from the air outlet.
(5) Apply sealants:
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(a) Apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the mating surfaces of the structure (1) and the valve (2). NOTE: The sealant must be new and you must not wait for the sealant to cure before you install the skin air-outlet valve.
NOTE: The sealant must not be tacky at the aircraft dispatch. The technical data sheet of the sealant gives the time you must wait until the sealant is no longer tacky.
NOTE: During the flight, temperatures are less than 10 deg.C (50 deg.F) and the sealants do not dry. The sealant cure time given in the technical data sheet does not include flight hours.
(6) Install the new AIPC 21-26-01-15-030 O-RING (5) or AIPC 21-26-81-15-030 O-RING (5) in the groove of the valve (2). (7) Remove the CAP-BLANKING from each electrical connector and receptacle.
(8) Make sure that all the electrical connections are clean and in the correct condition.
(9) Connect the electrical connector (6).
(10) Install the valve (2).
(11) Install the screws (3) and (4) and tighten them.
(12) Do the bonding with the screw at the top and the screw at the bottom (Ref. AMM TASK 20-28-00-912-802).
(13) Make sure that you also apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) into the peripheral clearance between the edge of the valve (2) and the aircraft structure.
NOTE: It is necessary to fully fill the space around the valve between the aircraft structure and the valve. To do this, you must apply a sufficient quantity of sealant before you install the valve.
(14) Apply adhesive tape to protect sealant: (a) Put Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) between the valve (2) and the aircraft structure. After the sealant is no longer tacky, do as follows:
CAUTION:
BEFORE YOU APPLY THE TAPE, MAKE SURE THAT THE SEALANT IS NOT TACKY. IF IT IS TACKY, THE TAPE CAN CAUSE DAMAGE TO THE SEALANT.
1 Apply Release Agent-- Water Base - (Material No.14DAB1) over the sealant. This will help to remove the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) after the sealant cure time. 2 Put an applicable length strip of Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) along the edge of the valve (2) and the aircraft structure.
3 Put overlap strips of the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) around the valve (2) to make sure that the surface is smooth. The minimum overlap length of the applied Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) is 25 mm (1 in.).
4 Make sure that there is no Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) :
- On the valve section of the assembly
- On the fillet seal around the valve section.
B. Do a Visual Inspection of the Adhesives:
(1) Do a visual inspection of the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) before each flight.
(a) If the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) is damaged, then:
1 Make sure that the sealant is in correct condition (no damage, no missing part).
a If the sealant is damaged, remove the skin air-outlet-valve (Ref. AMM TASK 21-26-53-000-002) and install it again (Ref. AMM TASK 21-26-53-400-001) or (Ref. AMM TASK 21-26-53-400-001).
b If the sealant is not damaged, replace the damaged Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) .
(2) Remove the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) and put new adhesives tape in less than 100 flight cycles.
(a) Clean the area around the valve (2) with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Methyl Alcohol - (Material No.08BBE1) or Cleaners Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and water.
(b) Make sure that the sealant is cured and in correct condition (no damage, no missing part).
1 If the sealant is not cured or damaged, remove the skin air-outlet-valve (Ref. AMM TASK 21-26-53-000-002) and install it again (Ref. AMM TASK 21-26-53-400-001) or (Ref. AMM TASK 21-26-53-400-001).
Subtask 21-26-53-865-056-A (1) Do a visual inspection of the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) before each flight.
(a) If the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) is damaged, then:
1 Make sure that the sealant is in correct condition (no damage, no missing part).
a If the sealant is damaged, remove the skin air-outlet-valve (Ref. AMM TASK 21-26-53-000-002) and install it again (Ref. AMM TASK 21-26-53-400-001) or (Ref. AMM TASK 21-26-53-400-001).
b If the sealant is not damaged, replace the damaged Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) .
(2) Remove the Adhesive Film Tape-- Aluminium Foil - (Material No.05RAB9) and put new adhesives tape in less than 100 flight cycles.
NOTE: The tape can stay in position for up to 400 flight cycles if you examine it at intervals of 100 flight cycles and find it in the correct condition.
(3) After 400 flight cycles, remove the adhesives tape. (a) Clean the area around the valve (2) with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Methyl Alcohol - (Material No.08BBE1) or Cleaners Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and water.
(b) Make sure that the sealant is cured and in correct condition (no damage, no missing part).
1 If the sealant is not cured or damaged, remove the skin air-outlet-valve (Ref. AMM TASK 21-26-53-000-002) and install it again (Ref. AMM TASK 21-26-53-400-001) or (Ref. AMM TASK 21-26-53-400-001).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-26-53-710-051-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
D. Do an operational test of the ventilation system of the avionics equipment (Ref. AMM TASK 21-26-00-710-001).
5. Close-upNOTE: As an alternative procedure, you can do this operational test without the Centralized Fault Display System (CFDS).
Subtask 21-26-53-942-051-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
Subtask 21-26-53-862-052-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).