DOC AIRBUS | AMM A320FRemoval of the AFT ACT Vent Check-Valve
TASK 28-28-63-000-001-A
Removal of the AFT ACT Vent Check-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 28-28-63-941-050-A ** ON A/C NOT FOR ALL
Subtask 28-28-63-020-050-B ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:18:01 UTC
Removal of the AFT ACT Vent Check-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:
MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR ARE CLEAR.
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 |
| 142 | WING CENTER BOX |
| 147AZ |
| 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 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 |
Aft ACT Vent-Check-Valve (239QM)Subtask 28-28-63-941-050-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 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 a WARNING NOTICE(S) in position to tell persons not to operate the main gear doors.
Subtask 28-28-63-650-050-A ** ON A/C NOT FOR ALL Subtask 28-28-63-010-050-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 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 ENG/APU FIRE panel 1WD installed 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 a WARNING NOTICE(S) in position to tell persons not to operate the main gear doors.
C. Get Access
(1) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Put an ACCESS PLATFORM 2M (6 FT) in position at the right MLG door.
(3) Get access to the fuel center tank (Ref. AMM TASK 28-10-00-910-002).
(4) Remove access cover 147AZ (Ref. AMM TASK 57-17-11-000-001).
Subtask 28-28-63-865-050-A ** ON A/C NOT FOR ALL (1) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Put an ACCESS PLATFORM 2M (6 FT) in position at the right MLG door.
(3) Get access to the fuel center tank (Ref. AMM TASK 28-10-00-910-002).
(4) Remove access cover 147AZ (Ref. AMM TASK 57-17-11-000-001).
D. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | FUEL/ACT VENT VLV/MAN/SPLY | 62QH | L21 |
| 121VU | FUEL/ACT VENT VLV/AUTO/SPLY | 61QH | L20 |
Subtask 28-28-63-020-050-B ** ON A/C NOT FOR ALL
A. Removal of the AFT ACT Vent-Check-Valve
(1) Put a CONTAINER 5 L (1.32 USGAL) below the AFT ACT vent-check-valve (11).
(2) Loosen the nut (7) and release the coupling (9).
(3) Remove the nut (3), the bolt (5) and the bonding lead (4).
(4) Remove the bolts (12) and the nuts (13).
(5) Remove the AFT ACT vent-check-valve (11) from the machined tee (1).
(6) Remove and discard the O-ring (2).
(7) Remove the coupling (9) from the AFT ACT vent-check-valve (11).
(8) Remove and discard the O-ring (10).
(9) Remove the retaining ring (8) and the nut (7) from the pipe assembly (6).
(10) Put the PLUG - BLANKING on the disconnect line ends.
(1) Put a CONTAINER 5 L (1.32 USGAL) below the AFT ACT vent-check-valve (11).
(2) Loosen the nut (7) and release the coupling (9).
(3) Remove the nut (3), the bolt (5) and the bonding lead (4).
(4) Remove the bolts (12) and the nuts (13).
(5) Remove the AFT ACT vent-check-valve (11) from the machined tee (1).
(6) Remove and discard the O-ring (2).
(7) Remove the coupling (9) from the AFT ACT vent-check-valve (11).
(8) Remove and discard the O-ring (10).
(9) Remove the retaining ring (8) and the nut (7) from the pipe assembly (6).
(10) Put the PLUG - BLANKING on the disconnect line ends.