W DOC AIRBUS | AMM A320F

Removal of the Normal Brake-Return Check-Valve

TASK 32-42-77-000-001-A
Removal of the Normal Brake-Return Check-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: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
FIN: 2593GM
FIN: 2594GM
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
ACCESS PLATFORM 3M (10 FT)
No specific
AR
CAP - BLANKING
No specific
1
CONTAINER 1 L (1/4 USGAL)
No specific
AR
PLUG - BLANKING
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
TASK 32-00-00-481-001-A
Installation of the Safety Devices on the Landing Gears
F Check Valve 2593GM (2594GM)
3. Job Set-up
Subtask 32-42-77-941-055-A
A. Safety Precautions
   (1) Put the SAFETY BARRIER(S) in position.
   (2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
   (3) On panel 400VU:
  • Make sure that the landing-gear control-lever 6GA is in the DOWN position.
  • Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
   (4) On panel 110VU:
  • Make sure that the free-fall extension-control-handle is in the normal position.
   (5) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
Subtask 32-42-77-864-050-A
B. Depressurization of the Applicable Hydraulic System(s)
   (1) Depressurize the Green hydraulic system (Ref. AMM TASK 29-00-00-864-001).
   (2) Depressurize the applicable hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-001).
Subtask 32-42-77-865-050-A
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
121VUHYDRAULIC/BRAKING AND STEERING/SYS2/SPLY4GGM36
121VUHYDRAULIC/BRAKING AND STEERING/SYS2/CTL3GGM35
121VUHYDRAULIC/BRAKING AND STEERING/SYS1/CTL1GGM34
121VUHYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY2GGM33
Subtask 32-42-77-941-054-A
D. Get Access
F Check Valve 2593GM (2594GM)
   (1) Put the ACCESS PLATFORM 3M (10 FT) in position below the applicable zone 571 or 671.
   (2) Put a CONTAINER 1 L (1/4 USGAL) below the check valve (3).
4. Procedure
Subtask 32-42-77-020-050-A
A. Removal of the Normal Brake-Return Check-Valve
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.
   (1) Loosen and disconnect the coupling nut (2).
   (2) Put a PLUG - BLANKING on the disconnected line ends.
   (3) Remove the check valve (3) from the manifold (5).
   (4) Remove and discard the O-ring (4) from the check valve (3).
   (5) Put a CAP - BLANKING on the open ports of the check valve (3) and the manifold (5).
[Rev.10 from 2021] 2026.04.01 00:48:29 UTC
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