W DOC AIRBUS | AMM A320F

Removal of the Pressure Relief Valve of the Yellow Hydraulic System

TASK 29-13-32-000-001-A
Removal of the Pressure Relief Valve of the Yellow Hydraulic System

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: 196
FIN: 3063GM
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
CONTAINER 2 L (0.53 USGAL)
No specific
AR
PLUG - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
2
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
196
HYDRAULIC COMPT AND FAIRINGS
196BB, 198CB
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 20-23-21-911-001-A
Removal/Installation of the Bobbins from their Housings and Installation of O-rings, Square Seals, and Back-up Rings on the Bobbins
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 29-23-00-860-001-A
Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
F Pressure Relief Valve on HP Manifold with P/N series 1553A9900
3. Job Set-up
Subtask 29-13-32-865-050-A
A. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN30
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN31
** ON A/C ALL
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
Subtask 29-13-32-010-050-A
B. Get Access
   (1) Open the access door 198CB.
   (2) Open the access panel 196BB.
Subtask 29-13-32-860-050-A
C. Aircraft Maintenance Configuration
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:
  • In the cockpit on the hydraulic section 40VU of the overhead panel
  • On the ground service panel of the Yellow hydraulic system.
   (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) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
   (5) Put the CONTAINER 2 L (0.53 USGAL) below the HP manifold of the Yellow hydraulic system.
   (6) Disconnect the isolation coupling of the power transfer unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
4. Procedure
Subtask 29-13-32-020-051-C
A. Removal of the Pressure Relief Valve
F Pressure Relief Valve on HP Manifold with P/N series 1553A9900
   (1) Remove the nut (6), the bolt (9) and the washer (8) and disconnect the bonding jumper (7).
   (2) Hold the pressure relief valve (1) and remove the bolts (2) and the washers (3).
   (3) Remove the pressure relief valve (1).
   (4) Remove the bobbins (5) (Ref. AMM TASK 20-23-21-911-001).
   (5) Install a PLUG - BLANKING in the HP manifold and in the ports of the pressure relief valve (1).
[Rev.10 from 2021] 2026.04.01 08:04:20 UTC
"Aviabrain" 2025