DOC AIRBUS | AMM A320FReactivation of the FWD Cargo-Compartment Ventilation Isolation-Valves
TASK 21-28-00-440-001-A
Reactivation of the FWD Cargo-Compartment Ventilation Isolation-Valves
1. Reason for the Job
MMEL 21-28-02B
FWD CARGO ISOLATION VALVE
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 21-28-00-861-057-A ** ON A/C NOT FOR ALL Subtask 21-28-00-865-098-A ** ON A/C NOT FOR ALL
Subtask 21-28-00-440-050-A ** ON A/C NOT FOR ALL
Subtask 21-28-00-710-063-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:11:10 UTC
Reactivation of the FWD Cargo-Compartment Ventilation Isolation-Valves
1. Reason for the Job
MMEL 21-28-02B
FWD CARGO ISOLATION VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 825 | |
| FOR [4HN] (ISOL VALVE FWD CARGO OUTLET) | |
| 132KW | |
| FOR [5HN] (ISOL VALVE FWD CARGO INLET) | |
| 131QW | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 21-28-00-710-005-A | Operational Test of the FWD Cargo-Compartment Ventilation-System |
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 25-54-12-000-001-A | Removal of the Forward Cargo-Compartment Partition |
| TASK 25-54-12-400-001-A | Installation of the Forward Cargo-Compartment Partition |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
Cargo-Compartment Ventilation Isolation-Valves - Component LocationSubtask 21-28-00-861-057-A ** ON A/C NOT FOR ALL Subtask 21-28-00-865-098-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-28-00-865-099-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 |
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 21-28-00-010-068-C ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 122VU | FWD CARGO VENT AND HTG/FAN | 1HN | T22 |
D. Get Access
(1) Open the FWD cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) at the FWD cargo-compartment door 825.
(3) Remove the access panels (Ref. AMM TASK 25-54-12-000-001):
(a) FOR [4HN] (ISOL VALVE FWD CARGO OUTLET)
(b) FOR [5HN] (ISOL VALVE FWD CARGO INLET)
4. Procedure(1) Open the FWD cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) at the FWD cargo-compartment door 825.
(3) Remove the access panels (Ref. AMM TASK 25-54-12-000-001):
(a) FOR [4HN] (ISOL VALVE FWD CARGO OUTLET)
(b) FOR [5HN] (ISOL VALVE FWD CARGO INLET)
Subtask 21-28-00-440-050-A ** ON A/C NOT FOR ALL
A. Reactivation of the FWD Cargo-Compartment Ventilation Isolation-Valves
(1) Remove the blanking plugs from the disconnected electrical connectors.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Remove the temporary attachments and connect the electrical connectors (3), (4HN-A and 5HN-A).
(a) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-28-00-865-100-A ** ON A/C NOT FOR ALL (1) Remove the blanking plugs from the disconnected electrical connectors.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Remove the temporary attachments and connect the electrical connectors (3), (4HN-A and 5HN-A).
(a) Make sure that the work area is clean and clear of tools and other items.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
5. Close-up| 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 |
Subtask 21-28-00-710-063-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FWD cargo-compartment ventilation-system (Ref. AMM TASK 21-28-00-710-005).
Subtask 21-28-00-410-069-C ** ON A/C NOT FOR ALL B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panels (Ref. AMM TASK 25-54-12-400-001):
(a) FOR [4HN] (ISOL VALVE FWD CARGO OUTLET)
(b) FOR [5HN] (ISOL VALVE FWD CARGO INLET)
(3) Remove the access platform(s).
(4) Close the FWD cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
Subtask 21-28-00-862-068-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panels (Ref. AMM TASK 25-54-12-400-001):
(a) FOR [4HN] (ISOL VALVE FWD CARGO OUTLET)
(b) FOR [5HN] (ISOL VALVE FWD CARGO INLET)
(3) Remove the access platform(s).
(4) Close the FWD cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).