W DOC AIRBUS | AMM A320F

Installation of the Normal Brake Safety-Valve

TASK 32-42-36-400-001-A
Installation of the Normal Brake Safety-Valve

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
FIN: 2616GM
FIN: 2617GM
FIN: 2618GM
FIN: 2619GM
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 BARRIER(S)
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.85 and 0.7 m.daN (75.22 and 61.95 lbf.in ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.02ABA1)
Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.08BAA9)
Non Aqueous Cleaner-General - -
(Material No.14SBA1)
Textile-Lint free Cotton -
 C. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
3
BACK-UP RINGS
AIPC 32-42-16-02-020
2
PACKINGS
AIPC 32-42-16-02-030
8
BACK-UP RING
AIPC 32-42-16-02-050
9
PACKING
AIPC 32-42-16-02-060
7
RETAINER
AIPC 32-42-16-02-070
6
PACKING
AIPC 32-42-16-02-080
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-10-00-863-001-A
Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-002-A
Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
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)
TASK 32-00-00-481-001-A
Installation of the Safety Devices on the Landing Gears
TASK 32-42-00-710-001-A
Operational Check of the Normal Braking System
TASK 32-42-00-870-001-A
Bleeding of the Normal Braking at the Brake Units
F Normal Brake Safety-Valve
3. Job Set-up
Subtask 32-42-36-941-057-A
A. Safety Precautions
   (1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
   (3) On the panel 400VU:
  • make sure that the landing-gear control-lever 6GA is in the DOWN position
  • make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the landing gear.
   (4) Make sure that the WARNING NOTICE(S) are in position to tell persons not to:
  • operate the landing gear doors
  • pressurize the Yellow and Green hydraulic systems
  • pressurize the Yellow and Green hydraulic reservoirs.
Subtask 32-42-36-860-056-A
B. Aircraft Maintenance Configuration
   (1) Make sure that the Yellow and the Green Hydraulic systems are depressurized (Ref. AMM TASK 29-00-00-864-001).
   (2) Make sure that the Green and the Yellow hydraulic system reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).
   (3) Make sure that the access platform is in position at the applicable Main Landing Gear (MLG).
   (4) Make sure that the container is in position below the applicable normal brake manifold.
Subtask 32-42-36-865-051-A
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
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
4. Procedure
Subtask 32-42-36-420-052-A
A. Preparation for Installation

F Normal Brake Safety-Valve
   (1) Clean the component interface and/or the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (4) Examine the filter (5) for contamination. If necessary clean the filter (5).
   (5) Lubricate the items that follow with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) :
Subtask 32-42-36-420-050-A
B. Installation of the Normal Brake Safety-Valve

F Normal Brake Safety-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) Install the packings (2) and the back-up rings (3) on the bobbin (4).
   (2) Install the packings (6) and (9), the retainer (7) and the back-up ring (8) on the filter (5).
   (3) Install the bobbin (4) and the filter (5) in the normal brake manifold.
   (4) Carefully install the normal brake safety-valve (1) on the normal brake manifold. Make sure that you do not cause damage to:
  • The packings (2), (6) and (9)
  • The back-up rings (3) and (8)
  • The retainer (7)
  • The bobbin (4)
  • The filter (5).
   (5) Install the bolts (10) and TORQUE them to between 0.85 and 0.7 m.daN (75.22 and 61.95 lbf.in ) T.
Subtask 32-42-36-865-052-A
C. Remove the safety clip(s) and the tag(s) and close 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 32-42-36-860-059-A
D. Aircraft Maintenance Configuration
   (1) Remove the WARNING NOTICE(S) to tell persons not to pressurize the Green and the Yellow hydraulic systems
   (2) Remove the WARNING NOTICE(S) to tell persons not to pressurize the Green and the Yellow hydraulic system reservoirs.
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING: MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.
   (3) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
   (4) Pressurize the Yellow hydraulic system
(Ref. AMM TASK 29-10-00-863-002).
   (5) Make sure that the Green and the Yellow hydraulic system reservoirs are pressurized (Ref. AMM TASK 29-14-00-614-002).
Subtask 32-42-36-870-053-A
E. Bleed the Braking System
   (1) Bleed the Normal Braking System (Ref. AMM TASK 32-42-00-870-001).
Subtask 32-42-36-710-053-A
F. Test
   (1) Do an operational test of the Normal Braking system (Ref. AMM TASK 32-42-00-710-001).
   (2) Make sure that there are no hydraulic leaks at:
  • the interface of the normal brake manifold and the normal brake safety-valve.
5. Close-up
Subtask 32-42-36-942-053-A
A. Removal of Equipment
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the SAFETY BARRIER(S).
   (3) Remove the WARNING NOTICE(S).
   (4) Remove the access platform(s).
   (5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.10 from 2021] 2026.04.01 00:48:10 UTC
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