W DOC AIRBUS | AMM A320F

Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action

TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action

1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
134AR, 154AR, 197CB, 197EB, 198CB
 C. Referenced Information
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 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
3. Job Set-up
Subtask 29-00-00-861-058-A
A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
Subtask 29-00-00-869-073-A
B. The following panel gives the circuit breakers for all hydraulic systems:
  • For the Green hydraulic system use the circuit breakers 1702GK, 3801GX, 3802GX and 3803GX.
  • For the Blue hydraulic system use the circuit breakers 2701GJ and 2702GJ.
  • For the Yellow hydraulic system use the circuit breakers 3801GX, 3802GX and 3803GX.
Subtask 29-00-00-865-066-A
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN30
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR34
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN31
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR33
** ON A/C ALL
123VUB HYD/ELEC PUMP2701GJAB09
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
Subtask 29-00-00-860-050-A
D. Aircraft Maintenance Configuration
   (1) For the Green and Yellow hydraulic systems:
  • On overhead panel 40VU, set the PTU pushbutton switch to the OFF position and make sure that the OFF legend comes on.
  • On overhead panel 40VU, set the applicable GREEN/ENG 1 PUMP and YELLOW/ENG 2 PUMP pushbutton switches to the FAULT/OFF position and make sure that the OFF legends come on.
   (2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
   (3) On the ECAM control panel, push the HYD key (on the SD, the HYD page comes into view).
Subtask 29-00-00-010-067-A
E. Get Access
   (1) Open the access door of the ground service panel related to the hydraulic system:
  • The access door 197CB for the Green system
  • The access door 197EB for the Blue system
  • The access door 198CB for the Yellow system.
4. Procedure
Subtask 29-00-00-864-058-A
A. Check of the Depressurization of the Related Hydraulic System
   (1) Make sure that there is no hydraulic supply from a ground power cart.
   (2) On the SD, on the HYD page make sure that the pressure of the related hydraulic system shows 0 psi (0 bar).
Subtask 29-00-00-941-051-A
B. Installation of the Warning Notices
   (1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the related hydraulic system:
  • On the panel 40VU in the cockpit
  • On the access panel 134AR and 154AR
  • On the ground service panel of the related hydraulic system.
5. Close-up
NOTE: You must do this close-up only when you have completed the work.
Subtask 29-00-00-865-068-A
A. 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
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN30
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR34
** ON A/C NOT FOR ALL
121VUHYDRAULIC/HYD POWER/Y3803GXN31
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR33
** ON A/C ALL
123VUB HYD/ELEC PUMP2701GJAB09
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
Subtask 29-00-00-410-064-A
B. Close Access
   (1) Remove the WARNING NOTICE(S).
   (2) Close the access door of the related ground service panel:
  • For the Green hydraulic system 197CB
  • For the Blue hydraulic system 197EB
  • For the Yellow hydraulic system 198CB.
Subtask 29-00-00-860-051-A
C. Put the aircraft back to the serviceable condition.
   (1) For the Green and Yellow hydraulic systems:
  • On panel 40VU, set the PTU pushbutton switch to the AUTO position and make sure that the OFF legend goes off.
  • On panel 40VU, set the related GREEN/ENG 1 PUMP and YELLOW/ENG 2 PUMP pushbutton switches to the AUTO position and make sure that the OFF lights go off.
   (2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
   (3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.01 03:55:52 UTC
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