DOC AIRBUS | AMM A320FRemoval of the Check Valve
TASK 21-26-41-000-001-A
Removal of the Check 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 21-26-41-020-052-G
[Rev.10 from 2021]
2026.04.02 06:11:03 UTC
Removal of the Check 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 | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 128 | REAR AVIONIC COMPARTMENT |
| 824 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
Check 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 21-26-41-861-050-A Subtask 21-26-41-865-050-A B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-26-41-010-050-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 |
| ** ON A/C NOT FOR ALL | |||
| 123VU | AVNCS VENT/EXTC/FAN | 2HQ | AE02 |
| ** ON A/C ALL | |||
| 123VU | AVNCS VENT/BLOWER/FAN | 1HQ | AD10 |
| ** ON A/C NOT FOR ALL | |||
| 123VU | AVNCS VENT/EXTC/FAN | 2HQ | AC04 |
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 21-26-41-020-052-G
A. Removal of the Check Valve
(1) Remove the clamp (11).
(2) Remove the clamps (8).
(4) Hold the duct (10) and remove the clamp (9).
(5) Remove the duct (10) and discard the O-ring (12).
(6) Remove the flexible sleeve (7).
(7) Remove the clamps (2).
(1) Remove the clamp (11).
(2) Remove the clamps (8).
NOTE: Do not discard the clamps (8). You must keep and use them during the installation procedure.
(3) Remove the clamp (14) and disconnect the drain hose (15) from the duct (10). (4) Hold the duct (10) and remove the clamp (9).
(5) Remove the duct (10) and discard the O-ring (12).
(6) Remove the flexible sleeve (7).
(7) Remove the clamps (2).
NOTE: Do not discard the clamps (2). You must keep and use them during the installation procedure.
(8) Remove the screws (6) and the washers (5).