DOC AIRBUS | AMM A320FInstallation of the Pressure Holding Valve
TASK 28-28-49-400-001-A
Installation of the Pressure Holding Valve
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 28-28-49-860-050-A ** ON A/C NOT FOR ALL
Subtask 28-28-49-420-050-C ** ON A/C NOT FOR ALL
Subtask 28-28-49-942-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:17:59 UTC
Installation of the Pressure Holding 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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 152
FIN: 241QM ** ON A/C NOT FOR ALL
FIN: 242QM ** ON A/C NOT FOR ALL
FIN: 243QM ** ON A/C NOT FOR ALL
1. Reason for the JobFIN: 241QM ** ON A/C NOT FOR ALL
FIN: 242QM ** ON A/C NOT FOR ALL
FIN: 243QM ** ON A/C NOT FOR ALL
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.01ABA1) | Turbine Fuel-- Kerosene - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 152 | AFT CARGO COMPARTMENT |
| 147AZ |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| FOR [241QM] (VALVE-PRESSURE HOLDING, FWD ACT) | ||
| 2 | PACKING | AIPC 28-28-85-44-120 |
| FOR [242QM] (VALVE-PRESSURE HOLDING, ACT) | ||
| 2 | PACKING | AIPC 28-28-85-42-180 |
| FOR [243QM] (VALVE-PRESSURE HOLDING, AFT ACT) | ||
| 2 | PACKING | AIPC 28-28-85-43-500 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-11-28-650-003-A | Pressure Refuel with Automatic Control |
| TASK 28-00-00-910-001-A | Fuel Safety Procedures |
| TASK 28-25-00-650-001-A | Pressure Defuel |
| TASK 28-25-00-869-001-A | Fuel Transfer |
| TASK 28-28-49-720-001-A | Leak Test of the Pressure Holding Valve (PHV)(s) |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
| TASK 57-17-11-000-001-B | Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door |
| TASK 57-17-11-400-001-B | Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door |
Subtask 28-28-49-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
Pressure Holding Valve (241QM, 242QM, 243QM) ** ON A/C NOT FOR ALL
Pressure Holding Valve (242QM, 243QM) ** ON A/C NOT FOR ALL
(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(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) Make sure that the WARNING NOTICE(S) are in position:
(6) Make sure that the fuel center tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(7) Make sure that the right MLG door is open (Ref. AMM TASK 32-12-00-010-001).
(8) Make sure that an ACCESS PLATFORM 2M (6 FT) is in position at the right MLG door.
(9) Make sure that access cover 147AZ is removed (Ref. AMM TASK 57-17-11-000-001).
(10) Make sure that the CONTAINER 5 L (1.32 USGAL) is in position below the valve (1).
Subtask 28-28-49-865-051-A ** ON A/C NOT FOR ALL Pressure Holding Valve (241QM, 242QM, 243QM) ** ON A/C NOT FOR ALL Pressure Holding Valve (242QM, 243QM) ** ON A/C NOT FOR ALL (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) Make sure that the WARNING NOTICE(S) are 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 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) Make sure that the fuel center tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(7) Make sure that the right MLG door is open (Ref. AMM TASK 32-12-00-010-001).
(8) Make sure that an ACCESS PLATFORM 2M (6 FT) is in position at the right MLG door.
(9) Make sure that access cover 147AZ is removed (Ref. AMM TASK 57-17-11-000-001).
(10) Make sure that the CONTAINER 5 L (1.32 USGAL) is in position below the valve (1).
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
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 28-28-49-420-050-C ** ON A/C NOT FOR ALL
A. Installation of the Pressure Holding Valve
(1) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) to new packings (2).
(2) FOR [241QM] (VALVE-PRESSURE HOLDING, FWD ACT)
Install the AIPC 28-28-85-44-120 PACKING (2) on the pressure holding valve (1).
(3) FOR [242QM] (VALVE-PRESSURE HOLDING, ACT)
Install the AIPC 28-28-85-42-180 PACKING (2) on the pressure holding valve (1).
(4) FOR [243QM] (VALVE-PRESSURE HOLDING, AFT ACT)
Install the AIPC 28-28-85-43-500 PACKING (2) on the pressure holding valve (1).
(5) Remove the PLUG-BLANKING from each disconnected line end.
(6) Install the pressure holding valve (1) on the bracket (3).
(7) TORQUE the pressure holding valve (1) to between 2.0 and 1.5 m.daN (14.75 and 11.06 lbf.ft )
.
Subtask 28-28-49-420-050-D ** ON A/C NOT FOR ALL (1) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) to new packings (2).
(2) FOR [241QM] (VALVE-PRESSURE HOLDING, FWD ACT)
Install the AIPC 28-28-85-44-120 PACKING (2) on the pressure holding valve (1).
(3) FOR [242QM] (VALVE-PRESSURE HOLDING, ACT)
Install the AIPC 28-28-85-42-180 PACKING (2) on the pressure holding valve (1).
(4) FOR [243QM] (VALVE-PRESSURE HOLDING, AFT ACT)
Install the AIPC 28-28-85-43-500 PACKING (2) on the pressure holding valve (1).
(5) Remove the PLUG-BLANKING from each disconnected line end.
(6) Install the pressure holding valve (1) on the bracket (3).
(7) TORQUE the pressure holding valve (1) to between 2.0 and 1.5 m.daN (14.75 and 11.06 lbf.ft )
. A. Installation of the Pressure Holding Valve
(1) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) to new packings (2).
(2) FOR [242QM] (VALVE-PRESSURE HOLDING, ACT)
Install the AIPC 28-28-85-42-180 PACKING (2) on the pressure holding valve (1).
(3) FOR [243QM] (VALVE-PRESSURE HOLDING, AFT ACT)
Install the AIPC 28-28-85-43-500 PACKING (2) on the pressure holding valve (1).
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the pressure holding valve (1) on the bracket (3).
(6) TORQUE the pressure holding valve (1) to between 2.0 and 1.5 m.daN (14.75 and 11.06 lbf.ft ).
Subtask 28-28-49-410-050-A ** ON A/C NOT FOR ALL (1) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) to new packings (2).
(2) FOR [242QM] (VALVE-PRESSURE HOLDING, ACT)
Install the AIPC 28-28-85-42-180 PACKING (2) on the pressure holding valve (1).
(3) FOR [243QM] (VALVE-PRESSURE HOLDING, AFT ACT)
Install the AIPC 28-28-85-43-500 PACKING (2) on the pressure holding valve (1).
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the pressure holding valve (1) on the bracket (3).
(6) TORQUE the pressure holding valve (1) to between 2.0 and 1.5 m.daN (14.75 and 11.06 lbf.ft )
.B. Close Access
(1) Make sure that there are no unwanted objects and materials, tools or other equipment in the center tank.
(2) Install access cover 147AZ (Ref. AMM TASK 57-17-11-400-001).
Subtask 28-28-49-865-052-A ** ON A/C NOT FOR ALL (1) Make sure that there are no unwanted objects and materials, tools or other equipment in the center tank.
(2) Install access cover 147AZ (Ref. AMM TASK 57-17-11-400-001).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 28-28-49-650-051-A ** ON A/C NOT FOR ALL | 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 |
D. Fuel Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).
Subtask 28-28-49-710-050-A ** ON A/C NOT FOR ALL (1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).
E. Do the leak test of the pressure holding valves (241QM, 242QM and 243QM) (Ref. AMM TASK 28-28-49-720-001).
5. Close-upSubtask 28-28-49-942-050-A ** ON A/C NOT FOR ALL
A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the container.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
Subtask 28-28-49-410-051-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the container.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).