DOC AIRBUS | AMM A320FInstallation of the Fwd Cargo Compartment Differential Pressure Switch
TASK 21-28-11-400-001-A
Installation of the Fwd Cargo Compartment Differential Pressure Switch
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 21-28-11-865-051-A ** ON A/C NOT FOR ALL
Subtask 21-28-11-420-050-A ** ON A/C NOT FOR ALL
Subtask 21-28-11-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:11:11 UTC
Installation of the Fwd Cargo Compartment Differential Pressure Switch
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 3M (10 FT)- ADJUSTABLE |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 132 | FORWARD CARGO COMPARTMENT |
| 132KW, 825 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-28-00-710-004-A | Operational Test of the FWD Cargo-Compartment Outlet Isolation-Valve in the Ditching Configuration |
Differential Pressure SwitchSubtask 21-28-11-865-051-A ** ON A/C NOT FOR ALL
A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 21-28-11-860-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/FWD CARGO/VENT/CTL & MONG | 2HN | C08 |
| 122VU | FWD CARGO VENT AND HTG/FAN | 1HN | T22 |
B. Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position.
Subtask 21-28-11-010-051-A ** ON A/C NOT FOR ALL C. Get Access
(1) Make sure that the access door 825 is open.
(2) Make sure that the panel 132KW is removed.
Subtask 21-28-11-210-050-A ** ON A/C NOT FOR ALL (1) Make sure that the access door 825 is open.
(2) Make sure that the panel 132KW is removed.
D. Make sure that the unions are not clogged and that the union threads are not damaged.
Subtask 21-28-11-160-050-A ** ON A/C NOT FOR ALL E. Clean the component interfaces and the adjacent area.
4. ProcedureSubtask 21-28-11-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Pressure Switch
(1) Install the pressure switch (5).
(2) Install the washers (3), the screws (4) and tighten the screws.
(3) Remove the blanking plug from the pipe (1).
(4) Install the pipe (1).
(5) Remove the blanking cap from the electrical connector (2) and make sure that the electrical connector is clean and in the correct condition.
(6) Connect the electrical connector (2).
Subtask 21-28-11-942-050-A ** ON A/C NOT FOR ALL (1) Install the pressure switch (5).
(2) Install the washers (3), the screws (4) and tighten the screws.
(3) Remove the blanking plug from the pipe (1).
(4) Install the pipe (1).
(5) Remove the blanking cap from the electrical connector (2) and make sure that the electrical connector is clean and in the correct condition.
(6) Connect the electrical connector (2).
B. Make sure that the work area is clean and clear of tools and other items.
Subtask 21-28-11-865-052-A ** ON A/C NOT FOR ALL C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-28-11-710-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/FWD CARGO/VENT/CTL & MONG | 2HN | C08 |
| 122VU | FWD CARGO VENT AND HTG/FAN | 1HN | T22 |
D. Do an operational test of the FWD cargo compartment ventilation (Ref. AMM TASK 21-28-00-710-004).
5. Close-upSubtask 21-28-11-410-050-A ** ON A/C NOT FOR ALL