DOC AIRBUS | AMM A320FRemoval of the ACT Isolation Valve
TASK 28-28-61-000-001-A
Removal of the ACT Isolation Valve
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 28-28-61-941-050-A ** ON A/C NOT FOR ALL
Subtask 28-28-61-020-051-B ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:18:01 UTC
Removal of the ACT Isolation Valve
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING:
OBEY THE FUEL SAFETY PROCEDURES.
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) |
| No specific | AR | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 141 | WING CENTER BOX |
| 148AZ |
| REFERENCE | DESIGNATION |
|---|---|
| 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 28-00-00-910-001-A | Fuel Safety Procedures |
| TASK 28-10-00-910-002-A | Access to the Fuel Tanks and the Work Areas |
| TASK 28-25-00-650-001-A | Pressure Defuel |
| TASK 28-28-71-000-001-A | Removal of the ACT Isolation-Valve Actuator |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 57-17-11-000-001-B | Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door |
ACT Isolation ValveSubtask 28-28-61-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the APU section of overhead panel 25VU, make sure that the APU/MASTER SW pushbutton switch is released (the ON legend is off).
(3) On the FUEL section of HYD/FUEL panel 40VU, make sure that all the L TK PUMPS and R TK PUMPS pushbutton switches are released (the OFF legends are on).
(4) Put the WARNING NOTICE(S) in position:
(6) Put the WARNING NOTICE(S) in position to tell persons not to operate the MLG doors.
Subtask 28-28-61-650-050-A ** ON A/C NOT FOR ALL Subtask 28-28-61-010-050-A ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the APU section of overhead panel 25VU, make sure that the APU/MASTER SW pushbutton switch is released (the ON legend is off).
(3) On the FUEL section of HYD/FUEL panel 40VU, make sure that all the L TK PUMPS and R TK PUMPS pushbutton switches are released (the OFF legends are on).
(4) Put the WARNING NOTICE(S) in position:
- On the APU section of overhead panel 25VU to tell persons not to operate the APU/MASTER SW pushbutton switch
- On the FUEL section of panel 40VU to tell persons not to operate the fuel system
- On the ENG/APU FIRE panel on overhead panel 20VU to tell persons not to operate the fire extinguishing system.
- On the Additional Center Tank (ACT) section of control panel 28VU to tell persons not to operate the fuel system.
(6) Put the WARNING NOTICE(S) in position to tell persons not to operate the MLG doors.
C. Get Access
(1) Open the left MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the left MLG door.
Subtask 28-28-61-020-050-A ** ON A/C NOT FOR ALL (1) Open the left MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the left MLG door.
D. Preparation for Removal
(1) Remove the ACT isolation-valve actuator (Ref. AMM TASK 28-28-71-000-001).
Subtask 28-28-61-010-051-A ** ON A/C NOT FOR ALL (1) Remove the ACT isolation-valve actuator (Ref. AMM TASK 28-28-71-000-001).
E. Get Access
(1) Get access to the fuel center tank (Ref. AMM TASK 28-10-00-910-002):
4. Procedure(1) Get access to the fuel center tank (Ref. AMM TASK 28-10-00-910-002):
- Remove access cover 148AZ or/and the ACT equipment support-door (Ref. AMM TASK 57-17-11-000-001).
Subtask 28-28-61-020-051-B ** ON A/C NOT FOR ALL
A. Removal of the ACT Isolation Valve
(1) Put a CONTAINER 5 L (1.32 USGAL) below the ACT isolation valve (9) and the connections between the lines (4) and (16).
(2) Remove the nut (12), the washer (11) and the bolt (10) and disconnect the bonding strap (6).
(3) Loosen the nuts (8) and (13).
(4) Remove and discard the retaining rings (7) and (14).
(5) Remove and discard the O-rings (2) and (15).
(6) Remove the half coupling (3).
(7) Remove the screws (1) from the ACT isolation valve (9).
(8) Remove the ACT isolation valve (9) and discard the O-ring (5).
(1) Put a CONTAINER 5 L (1.32 USGAL) below the ACT isolation valve (9) and the connections between the lines (4) and (16).
(2) Remove the nut (12), the washer (11) and the bolt (10) and disconnect the bonding strap (6).
(3) Loosen the nuts (8) and (13).
(4) Remove and discard the retaining rings (7) and (14).
(5) Remove and discard the O-rings (2) and (15).
(6) Remove the half coupling (3).
(7) Remove the screws (1) from the ACT isolation valve (9).
(8) Remove the ACT isolation valve (9) and discard the O-ring (5).
NOTE: The play at the connections between the lines (4) and (16) will help you to release the ACT isolation valve (9).
(9) Put the PLUG-BLANKING in each disconnected line end.