DOC AIRBUS | AMM A320FInstallation of the Air Extraction Duct
TASK 21-26-41-400-002-A
Installation of the Air Extraction Duct
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 21-26-41-860-051-A
Subtask 21-26-41-420-053-B
Subtask 21-26-41-410-051-A
[Rev.10 from 2021]
2026.03.31 23:02:52 UTC
Installation of the Air Extraction Duct
WARNING:
MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
1. Reason for the JobSelf 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 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 824 |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 6 | ORING | AIPC 21-26-01-16-030 |
| 6 | ORING | AIPC 21-26-81-16-030 |
| 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 21-26-51-710-001-A | Operational Test of the Extract and Blower Fans (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 26-15-15-400-001-A | Installation of the Smoke Detector - Avionics Compartment |
| 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 Extraction DuctSubtask 21-26-41-860-051-A
A. Aircraft Maintenance Configuration
(Ref. AMM TASK 24-42-00-861-001)
Subtask 21-26-41-865-054-A 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) Make sure that the ground service network is energized(Ref. AMM TASK 24-42-00-861-001)
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 21-26-41-010-053-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) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below access door 824.
(2) Make sure that access door 824 is open (Ref. AMM TASK 52-41-00-010-002).
4. Procedure(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below access door 824.
(2) Make sure that access door 824 is open (Ref. AMM TASK 52-41-00-010-002).
Subtask 21-26-41-420-053-B
A. Installation of the Air Extraction Duct
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Make sure that the flexible sleeve (10) is in position on the fan (11).
(5) Make sure that the arrow that shows the airflow points down.
(6) Make sure that the flexible sleeves (3), (17) and (14) are in position on the ducts (1), (15) and (12).
(7) Install the duct (18) in the flexible sleeve (10).
(8) Make sure that the flexible sleeve (10) is in the correct position between the two red marks.
(9) Install the clamps (9) that you removed during the removal procedure. Do not fully tighten them at this time.
(10) Move the flexible sleeves (3), (17) and (14) on the duct (18).
(11) Make sure that the flexible sleeves (3), (17) and (14) are in the correct position between the two red marks.
(12) Install the clamps (2), (13) and (16) that you removed during the removal procedure and tighten them.
(13) Tighten the clamps (9).
(14) Install the new AIPC 21-26-01-16-030 ORING (6) or AIPC 21-26-81-16-030 ORING (6) on the union (5).
(15) Install the union (5) on the duct (18) and tighten it.
(16) Install the pipe (4) on the union (5).
(17) Tighten the pipe (4).
(18) If you removed the avionics compartment smoke-detector (7), install it (Ref. AMM TASK 26-15-15-400-001).
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connector (8) on the avionics compartment smoke-detector (7).
Subtask 21-26-41-865-056-A (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Make sure that the flexible sleeve (10) is in position on the fan (11).
(5) Make sure that the arrow that shows the airflow points down.
(6) Make sure that the flexible sleeves (3), (17) and (14) are in position on the ducts (1), (15) and (12).
(7) Install the duct (18) in the flexible sleeve (10).
(8) Make sure that the flexible sleeve (10) is in the correct position between the two red marks.
(9) Install the clamps (9) that you removed during the removal procedure. Do not fully tighten them at this time.
(10) Move the flexible sleeves (3), (17) and (14) on the duct (18).
(11) Make sure that the flexible sleeves (3), (17) and (14) are in the correct position between the two red marks.
(12) Install the clamps (2), (13) and (16) that you removed during the removal procedure and tighten them.
(13) Tighten the clamps (9).
(14) Install the new AIPC 21-26-01-16-030 ORING (6) or AIPC 21-26-81-16-030 ORING (6) on the union (5).
(15) Install the union (5) on the duct (18) and tighten it.
(16) Install the pipe (4) on the union (5).
(17) Tighten the pipe (4).
(18) If you removed the avionics compartment smoke-detector (7), install it (Ref. AMM TASK 26-15-15-400-001).
CAUTION:
MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
(19) Connect the electrical connector (8): (a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connector (8) on the avionics compartment smoke-detector (7).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-26-41-710-050-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. Do an operational test of the ventilation system of the avionics equipment (Ref. AMM TASK 21-26-00-710-001).
5. Close-upNOTE: As an alternative procedure, you can do the operational test of the blower and extract fans (without the CFDS) (Ref. AMM TASK 21-26-51-710-001).
Subtask 21-26-41-410-051-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 21-26-41-862-052-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).