DOC AIRBUS | AMM A320FReactivation of the Conditioned-Air Inlet Valve
TASK 21-26-00-440-003-A
Reactivation of the Conditioned-Air Inlet Valve
1. Reason for the Job
MMEL 21-26-08A
AVIONICS AIR CONDITIONING INLET VALVE
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 21-26-00-440-053-A
Subtask 21-26-00-410-059-A
[Rev.10 from 2021]
2026.04.02 06:10:58 UTC
Reactivation of the Conditioned-Air Inlet Valve
1. Reason for the Job
MMEL 21-26-08A
AVIONICS AIR CONDITIONING INLET VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 824 |
| 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 |
Air-Conditioned 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 21-26-00-861-062-A Subtask 21-26-00-865-066-A B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-26-00-010-058-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |
C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824.
4. Procedure(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824.
Subtask 21-26-00-440-053-A
A. Reactivation the Conditioned-Air Inlet Valve
(1) Get the electrical cable and its connector.
(2) Remove the CAP-BLANKING from each electrical connector and receptacle.
(3) Make sure that all the electrical connections are clean and in the correct condition.
(4) Connect the electrical connector 21HQ-A to the valve 21HQ.
Subtask 21-26-00-865-067-A (1) Get the electrical cable and its connector.
(2) Remove the CAP-BLANKING from each electrical connector and receptacle.
(3) Make sure that all the electrical connections are clean and in the correct condition.
(4) Connect the electrical connector 21HQ-A to the valve 21HQ.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-26-00-710-056-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 5HQ | D05 |
C. Do an operational test of the ventilation system of the avionics equipment (Ref. AMM TASK 21-26-00-710-001).
5. Close-upNOTE: Make sure that all the fault messages shown are related to the fault of the conditioned-air inlet valve (21HQ). If other messages are shown, refer to the related MMEL valve item.
Subtask 21-26-00-410-059-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).
(4) Remove the WARNING NOTICE(S).
Subtask 21-26-00-862-062-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).
(4) Remove the WARNING NOTICE(S).