DOC AIRBUS | AMM A320FRemoval of the Avionics Equipment Ventilation-Duct
TASK 21-26-42-000-001-A
Removal of the Avionics Equipment Ventilation-Duct
This removal is necessary to do maintenance on the spherical bearing of the nose landing gear.
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 21-26-42-861-050-A Subtask 21-26-42-941-050-A
Subtask 21-26-42-020-050-B
[Rev.10 from 2021]
2026.03.31 23:02:57 UTC
Removal of the Avionics Equipment Ventilation-Duct
CAUTION:
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.
1. Reason for the JobThis removal is necessary to do maintenance on the spherical bearing of the nose landing gear.
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 | PLUG - BLANKING |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 824 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 52-41-00-010-002-A | Open the Avionics Compartment Doors for Access |
Avionics Equipment Ventilation-DuctSubtask 21-26-42-861-050-A Subtask 21-26-42-941-050-A
B. Safety Precautions
(1) On the AIR COND panel 30VU:
(a) Make sure that the APU BLEED, all ENG BLEED and the PACK 1(2) pushbutton switches are released.
(b) Put a WARNING NOTICE(S) in position to tell persons not to operate these pushbutton switches.
(2) On the HP and LP ground connectors, put a warning notice in position to tell persons not to supply the ground air sources.
Subtask 21-26-42-010-050-A (1) On the AIR COND panel 30VU:
(a) Make sure that the APU BLEED, all ENG BLEED and the PACK 1(2) pushbutton switches are released.
(b) Put a WARNING NOTICE(S) in position to tell persons not to operate these pushbutton switches.
(2) On the HP and LP ground connectors, put a warning notice in position to tell persons not to supply the ground air sources.
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 (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 21-26-42-020-050-B
A. Removal of the Avionics Equipment Ventilation-Duct
(1) Remove the clamp (3).
(2) Disconnect the flexible hose (4).
(3) Remove the clamp (6).
(4) Remove the clamps (10). Keep the clamps (10) for the installation procedure.
(5) Move the flexible sleeves (11) to disengage the duct (2).
(6) Remove the duct (2).
(7) Remove the flexible sleeves (11).
(8) Remove the clamp (8) from the bracket (7).
(9) Put the PLUG-BLANKING in each disconnected line end.
(1) Remove the clamp (3).
(2) Disconnect the flexible hose (4).
(3) Remove the clamp (6).
(4) Remove the clamps (10). Keep the clamps (10) for the installation procedure.
(5) Move the flexible sleeves (11) to disengage the duct (2).
(6) Remove the duct (2).
(7) Remove the flexible sleeves (11).
(8) Remove the clamp (8) from the bracket (7).
(9) Put the PLUG-BLANKING in each disconnected line end.