DOC AIRBUS | AMM A320FDeactivation of the Avionics Ventilation Filter
TASK 21-26-00-040-009-A
Deactivation of the Avionics Ventilation Filter
MMEL 21-26-09B
AVIONICS VENTILATION FILTER
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 21-26-00-861-080-A Subtask 21-26-00-010-071-A
Subtask 21-26-00-040-059-A
Subtask 21-26-00-410-072-A
[Rev.10 from 2021]
2026.04.02 06:10:59 UTC
Deactivation of the Avionics Ventilation Filter
Task Summary
1. Reason for the Job| Access | Test | Specific Tools | Mhr | E/T | Nb Men |
|---|---|---|---|---|---|
| YES | YES | NO | 0.5 | 0.5 | 1 |
MMEL 21-26-09B
AVIONICS VENTILATION FILTER
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 |
|---|---|
| 824 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 52-41-00-010-002-A | Open the Avionics Compartment Doors for Access |
| TASK 52-41-00-410-002-A | Close the Avionics Compartment Doors after Access |
Air-Conditioned Inlet ValveSubtask 21-26-00-861-080-A Subtask 21-26-00-010-071-A
B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824 (Ref. AMM TASK 52-41-00-010-002).
4. Procedure(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824 (Ref. AMM TASK 52-41-00-010-002).
Subtask 21-26-00-040-059-A
A. Deactivation of the Avionics Ventilation Filter
(1) On the VENTILATION section of the overhead panel 22VU:
5. Close-up(1) On the VENTILATION section of the overhead panel 22VU:
- release the EXTRACT pushbutton switch (the OVRD legend comes on).
- before each flight, make sure that the conditioned-air inlet valve 21HQ is open (the position indicator of the valve is at 0).
Subtask 21-26-00-410-072-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 21-26-00-869-101-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).
B. Aircraft Maintenance Configuration
(1) Make an entry in the logbook.
Subtask 21-26-00-862-080-A (1) Make an entry in the logbook.