W DOC AIRBUS | AMM A320F

Installation of the Air Relief Valve of the Yellow Hydraulic System

TASK 29-14-17-400-003-A
Installation of the Air Relief Valve of the Yellow Hydraulic System

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
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.
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
2
WARNING NOTICE(S)
No specific
Torque wrench: range to between 3.47 and 3.186 m.daN (25.59 and 23.50 lbf.ft ) T
No specific
Torque wrench: range to between 8.3 and 7.5 m.daN (61.21 and 55.31 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
No specific
lockwire 0.8 mm (0.032 in.)
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
196BB
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
3
O-RING
AIPC 29-14-03-11-020
3
O-RING
AIPC 29-14-83-14-020
 E. Referenced Information
REFERENCE
DESIGNATION
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 29-14-00-614-001-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 Pressure Relief Valve
3. Job Set-up
Subtask 29-14-17-860-056-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the hydraulic system:
  • In the cockpit on the hydraulic section 40VU of the overhead panel,
  • On the ground service panel of the Yellow hydraulic system.
   (2) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (3) Make sure that the Yellow 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 Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
   (5) Make sure that the access door 196BB is open.
Subtask 29-14-17-865-057-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN30
** ON A/C ALL
121VUHYDRAULIC/LOW/LVL/IND1832GQN32
121VUHYDRAULIC/HYD/QTY/IND1831GQP35
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN31
** ON A/C ALL
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
4. Procedure
Subtask 29-14-17-420-052-A
A. Installation of the Air Relief Valve
CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.
CAUTION: YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.
   (1) Clean the component interfaces and the adjacent area.
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Remove the blanking plugs.
   (4) Make sure that the hydraulic line end-fittings are serviceable.
   (5) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the air relief valve (2) and to the AIPC 29-14-03-11-020 O-RING (3) or AIPC 29-14-83-14-020 O-RING (3).
   (6) Position the O-ring and install the air relief valve (2) on the reservoir manifold (4).
   (7) TORQUE the air relief valve (2) to between 3.47 and 3.186 m.daN (25.59 and 23.50 lbf.ft ) T.
   (8) Safety the air relief valve (2) with lockwire 0.8 mm (0.032 in.).
   (9) Connect the union nut (1) to the air relief valve (2).
   (10) TORQUE the union nut (1) to between 8.3 and 7.5 m.daN (61.21 and 55.31 lbf.ft ) T.
5. Close-up
Subtask 29-14-17-790-052-A
A. Leak Test of the Air Relief Valve
   (1) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
   (2) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections of the air relief valve (2) and make sure that there are no leaks.
Subtask 29-14-17-410-052-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the access door 196BB.
Subtask 29-14-17-942-052-A
C. Remove the warning notices from the cockpit and the ground service panel.
Subtask 29-14-17-865-058-A
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN30
** ON A/C ALL
121VUHYDRAULIC/LOW/LVL/IND1832GQN32
121VUHYDRAULIC/HYD/QTY/IND1831GQP35
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN31
** ON A/C ALL
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
[Rev.10 from 2021] 2026.04.01 08:09:32 UTC
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