W DOC AIRBUS | AMM A320F

Installation of the Accumulator-Gas Charging Valve

TASK 29-12-22-400-001-A
Installation of the Accumulator-Gas Charging 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.
ZONE: 195
FIN: 2071GM
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
CAP - BLANKING
No specific
2
PLUG - BLANKING
No specific
2
WARNING NOTICE(S)
No specific
Torque wrench: range to between 60.00 and 50.00 lbf.in (0.68 and 0.57 m.daN ) T
No specific
Torque wrench: range to between 3.44 and 3.34 m.daN (25.37 and 24.63 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.02ABA1)
Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.14CCB6)
Testing Medium-Leak Detection - Oxygen System
(Material No.14QFB1)
Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
195
HYDRAULIC COMPT AND FAIRINGS
195BB
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
3
0-RING
AIPC 29-14-14-01-010
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 12-12-29-611-001-A
Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-14-29-614-001-A
Fill the Hydraulic Power Accumulators with Nitrogen
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A
Safety Procedures of the Hydraulic System
TASK 29-10-00-863-003-A
Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01
Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A
Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01
Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
F Gas Charging Valve
3. Job Set-up
Subtask 29-12-22-860-051-A
A. Aircraft Maintenance Configuration
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Blue hydraulic system:
  • In the cockpit on the hydraulic section 40VU of the overhead panel
  • On the ground service panel of the Blue hydraulic system.
   (3) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
   (4) Make sure that the reservoir of the Blue hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
   (5) Make sure that the access door 195BB is open .
Subtask 29-12-22-865-051-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
121VUHYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST1881GPN35
123VUB HYD/ELEC PUMP2701GJAB09
4. Procedure
Subtask 29-12-22-420-050-A
A. Installation of the Gas Charging-Valve
   (1) Clean the component interfaces and the adjacent area.
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Remove the PLUG - BLANKING from the adapter (2).
   (4) Remove the CAP - BLANKING from the gas charging-valve (4).
   (5) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the gas charging-valve (4) connection.
   (6) Make sure that the 0-ring seal (3) is installed on the gas charging-valve (4).
   (7) If the removed charging-valve (4) is to be installed, remove the used 0-ring seal (3) and install a new AIPC 29-14-14-01-010 0-RING (3)
   (8) Install the gas charging-valve (4) on the adapter (2).
   (9) TORQUE the gas charging-valve (4) to between 3.44 and 3.34 m.daN (25.37 and 24.63 lbf.ft ) T.
   (10) Safety the gas charging-valve (4) with the lockwire 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
Subtask 29-12-22-860-052-A
B. Preparation for Test
   (1) Fill the accumulator with nitrogen (Ref. AMM TASK 12-14-29-614-001).
   (2) Close the gas charging-valve nut (5).
   (3) Torque the gas charging-valve nut (5) to between 60.00 and 50.00 lbf.in (0.68 and 0.57 m.daN ) T.
   (4) Remove the WARNING NOTICE(S) from the cockpit and the ground service panel.
   (5) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
   (6) Make sure that the fluid level in the reservoir of the Blue hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
   (7) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
Subtask 29-12-22-790-050-A
C. Test
   (1) Apply the leak detector Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections of the gas charging-valve (4), the adapter (2) and the endcap (6). Make sure that there are no leaks.
5. Close-up
Subtask 29-12-22-860-053-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the access door 195BB.
Subtask 29-12-22-865-052-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
121VUHYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST1881GPN35
123VUB HYD/ELEC PUMP2701GJAB09
[Rev.10 from 2021] 2026.04.01 00:19:01 UTC
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