DOC AIRBUS | AMM A320FRemoval of the Avionics Ventilation Skin Exchanger Isolation Valve
TASK 21-26-55-000-002-A
Removal of the Avionics Ventilation Skin Exchanger Isolation 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. Referenced Information
3. Job Set-up
Subtask 21-26-55-020-052-B
[Rev.10 from 2021]
2026.04.02 06:11:09 UTC
Removal of the Avionics Ventilation Skin Exchanger Isolation 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 |
| No specific | AR | CAP - BLANKING |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 126 | LATERAL AVIONIC COMPARTMENT |
| 822 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
Skin Exchanger Isolation 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 21-26-55-861-052-A Subtask 21-26-55-865-053-A B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-26-55-010-052-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AIR COND/AVNCS VENT/CTL | 6HQ | D06 |
C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 822.
(2) Open the access door 822.
4. Procedure(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 822.
(2) Open the access door 822.
Subtask 21-26-55-020-052-B
A. Removal of the Skin Exchanger Isolation Valve
(1) Disconnect the electrical connector (24) from the valve (23).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the clamps (25) and (27).
(5) Remove the clamp (21) and the valve (23).
(6) Discard the O-ring (22).
(7) Remove the flexible sleeve (26).
(8) Put the PLUG-BLANKING in each disconnected line end.
(1) Disconnect the electrical connector (24) from the valve (23).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the clamps (25) and (27).
NOTE: Do not discard the clamps (25) and (27). You must keep and use them during the installation procedure.
(4) Move the flexible sleeve (26) on the duct (28) to disengage the valve. (5) Remove the clamp (21) and the valve (23).
(6) Discard the O-ring (22).
(7) Remove the flexible sleeve (26).
(8) Put the PLUG-BLANKING in each disconnected line end.