DOC AIRBUS | AMM A320FInstallation of the Conditioned Air Inlet-Valve
TASK 21-26-54-400-001-A
Installation of the Conditioned Air Inlet-Valve
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 21-26-54-420-050-B
Subtask 21-26-54-410-050-A
[Rev.10 from 2021]
2026.04.02 06:11:09 UTC
Installation of the Conditioned Air Inlet-Valve
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 2M (6 FT) - ADJUSTABLE |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 127 | REAR AVIONIC COMPARTMENT |
| 824 |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 7 | O-RING | AIPC 21-26-01-09-020 |
| 7 | O-RING | AIPC 21-26-81-09-040 |
| REFERENCE | DESIGNATION |
|---|---|
| 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 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 |
| TASK 52-41-00-410-002-A | Close the Avionics Compartment Doors after Access |
Conditioned Air Inlet-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 21-26-54-860-050-A A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).
Subtask 21-26-54-010-051-A (1) Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).
B. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 824.
(2) Make sure that the access door 824 is open.
Subtask 21-26-54-865-051-A (1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 824.
(2) Make sure that the access door 824 is open.
C. 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 |
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |
| 122VU | AIR COND/AVNCS/VENT/MONG | 3HQ | Y17 |
Subtask 21-26-54-420-050-B
A. Installation of the Conditioned Air Inlet-Valve
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Install the flexible sleeve (3) on the pipe (1).
(5) Install the new AIPC 21-26-01-09-020 O-RING (7) or AIPC 21-26-81-09-040 O-RING (7) in the groove of the pipe (9).
(6) Install the valve (6) in the flexible sleeve (3).
(8) Install the clamp (8) and torque it with the value given on the clamp.
(9) Put the flexible sleeve (3) in position.
(10) Install the clamps (2) and (4) and tighten them:
(a) Use the clamps (2) and (4) that you removed during the removal procedure.
Subtask 21-26-54-865-052-A (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Install the flexible sleeve (3) on the pipe (1).
(5) Install the new AIPC 21-26-01-09-020 O-RING (7) or AIPC 21-26-81-09-040 O-RING (7) in the groove of the pipe (9).
(6) Install the valve (6) in the flexible sleeve (3).
NOTE: The arrow that shows the airflow direction points in the up direction.
(7) Make sure that the valve (6) is in the correct angular position. The electrical cable must not be too tight or too loose. (8) Install the clamp (8) and torque it with the value given on the clamp.
(9) Put the flexible sleeve (3) in position.
(10) Install the clamps (2) and (4) and tighten them:
(a) Use the clamps (2) and (4) that you removed during the removal procedure.
NOTE: The quantity of the clamps (4) and (2) are not same for all the aircraft configurations.
(11) Remove the CAP-BLANKING from each electrical connector and receptacle.CAUTION:
MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
(12) Connect the electrical connector (5). B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-26-54-710-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |
| 122VU | AIR COND/AVNCS/VENT/MONG | 3HQ | Y17 |
C. 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 CFDS.
Subtask 21-26-54-410-050-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).
Subtask 21-26-54-862-051-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).