W DOC AIRBUS | AMM A320F

Detailed Visual inspection of the Alternate Brake Dual Distribution Valve (BDDV) for Corrosion

TASK 32-43-14-200-003-A
Detailed Visual inspection of the Alternate Brake Dual Distribution Valve (BDDV) for Corrosion

FIN: 2577GM ** ON A/C NOT FOR ALL
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
BRUSH - BRISTLED, SMALL
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
Torque wrench: range to between 0.15 and 0.1 m.daN (13.27 and 8.85 lbf.in ) T
No specific
Torque wrench: range to between 0.3 and 0.2 m.daN (26.55 and 17.70 lbf.in ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.03JCA9)
Silicone base Grease-Mechanisms and Seals - -
(Material No.14QDB1)
Wire-Locking Dia: 0.5 mm (0.020 inch) CRES Nickel Alloy -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
148FB
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 24-42-00-861-001-A
Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
TASK 29-10-00-864-002-A
Depressurize the Yellow Hydraulic System
TASK 32-12-00-010-001-A
Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A
Close the Main Gear Doors after Access
TASK 32-43-00-710-001-A
Operational Check of Alternate Braking System
TASK 32-43-14-000-001-A
Removal of the Dual-Valve Alternate Brake-Distribution
TASK 32-43-14-400-001-A
Installation of the Dual-Valve Alternate Brake-Distribution
TASK 53-35-13-000-001-A
Removal of the Belly Fairing Access Panels
TASK 53-35-13-400-001-A
Installation of the Belly Fairing Access Panels
F Inspection for Corrosion
3. Job Set-up
Subtask 32-43-14-861-052-A ** ON A/C NOT FOR ALL
A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 32-43-14-860-055-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) Open the Main Landing Gear (MLG) doors (Ref. AMM TASK 32-12-00-010-001).
   (2) Put the access platform in position.
   (3) Depressurize the Yellow Hydraulic System (Ref. AMM TASK 29-10-00-864-002).
Subtask 32-43-14-010-053-A ** ON A/C NOT FOR ALL
C. Remove the belly fairing panel 148FB, (Ref. AMM TASK 53-35-13-000-001).
Subtask 32-43-14-941-054-A ** ON A/C NOT FOR ALL
D. Safety Precautions
   (1) Put the warning notices in position to tell persons not to pressurize the yellow hydraulic system:
  • on the panel 40VU in the cockpit
  • on the ground service panel of the yellow hydraulic system.
   (2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
Subtask 32-43-14-865-057-A ** ON A/C NOT FOR ALL
E. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR 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
121VUHYDRAULIC/HYD POWER/Y3803GXN30
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
121VUHYDRAULIC/Y HYD/PUMP ENG2/CTL3701GDQ36
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
4. Procedure
Subtask 32-43-14-210-054-A ** ON A/C NOT FOR ALL
A. Preparation for Inspection
F Inspection for Corrosion ** ON A/C NOT FOR ALL
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.
   (1) Cut and discard the safety wire (5).
   (2) Remove the screws (4), (6) and (7), and the washers (3).
   (3) Carefully remove the cover (2) from the BDDV 2577GM (1).
   (4) Do the Inspection for Corrosion
     (a) Use a strong flashlight and inspection mirror and examine the BDDV 2577GM (1).
     (b) If no corrosion is found, do step 4. A. (5) (a).
     (c) No corrosion is permitted on:
     (d) If light corrosion is found on:
  • The support (11)
  • The rocker arm (8)
  • The hexagonal heads of the screws (9)
  • The hexagonal heads of the assembly (10).
    Lubricate these parts as follows.
   (5) Lubrication
     (a) Use a BRUSH - BRISTLED, SMALL and apply Silicone base Grease-Mechanisms and Seals - - (Material No.03JCA9) around:
  • The 2 rocker arms (8)
  • The spherical head rod assemblies (10)
  • The support (11)
  • The needles
  • The parts that turn of the rocker arms.
    Carefully remove too much grease.
Subtask 32-43-14-410-054-A ** ON A/C NOT FOR ALL
B. Close Up
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Put the cover (2) in position on the BDDV 2577GM (1).
   (3) Install the washers (3) and the screws (4), (6) and (7).
   (4) Tighten the screw (4) and TORQUE to between 0.15 and 0.1 m.daN (13.27 and 8.85 lbf.in ) T.
   (5) Tighten the screws (6) and (7), and TORQUE them to between 0.3 and 0.2 m.daN (26.55 and 17.70 lbf.in ) T.
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.
   (6) Safety the screws (4), (6) and (7) with 14QDB1Wire-Locking Dia: 0.5 mm (0.020 inch) CRES Nickel Alloy -.
Subtask 32-43-14-865-058-A ** ON A/C NOT FOR ALL
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR 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
121VUHYDRAULIC/HYD POWER/Y3803GXN30
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
121VUHYDRAULIC/Y HYD/PUMP ENG2/CTL3701GDQ36
123VUY HYD/ELEC/PUMP3802GXAB06
123VUY HYD/ELEC/ELEC PUMP/NORM3801GXAB03
Subtask 32-43-14-942-055-A ** ON A/C NOT FOR ALL
D. Remove the WARNING NOTICE(S).
Subtask 32-43-14-710-053-A ** ON A/C NOT FOR ALL
E. Do the operational test of the alternate braking system with anti-skid (Ref. AMM TASK 32-43-00-710-001).
5. Close-up
Subtask 32-43-14-410-055-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the belly fairing panel 148FB, (Ref. AMM TASK 53-35-13-400-001).
   (3) Remove the access platform(s).
   (4) Make sure that the work area is clean and clear of tools and other items.
   (5) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
Subtask 32-43-14-862-052-A ** ON A/C NOT FOR ALL
B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
[Rev.10 from 2021] 2026.04.01 00:48:52 UTC
"Aviabrain" 2025