W DOC AIRBUS | AMM A320F

Operational Check of Alternate Braking System

TASK 32-43-00-710-802-A
Operational Check of Alternate Braking 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.
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.
WARNING: PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER TO THE AIRCRAFT.
ZONE: 730
ZONE: 740
1. Reason for the Job
Refer to the MPD TASK: 324300-01
OPERATIONAL CHECK OF ALTERNATE BRAKING SYSTEM

2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
730
LEFT MAIN LANDING GEAR & DOORS
740
RIGHT MAIN LANDING GEAR & DOORS
 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 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-10-00-863-002-A
Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-23-00-863-001-A
Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A
Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 29-24-00-863-001-A
Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 31-36-00-740-008-A
Access to the Parameter Call-Up Menus
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 32-43-00-865-058-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUL/G/Y BRK/PRESS/IND61GGC10
** ON A/C NOT FOR ALL
49VUABCU &/Y BRK/PRESS IND61GGC10
** ON A/C NOT FOR ALL
121VUAIDS/DMU4TVK15
** 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
** ON A/C NOT FOR ALL
121VUAIDS & RCDR/FDIMU5TVK15
** ON A/C NOT FOR ALL
121VUAIDS & RCDR/FDIMU5TVK38
Subtask 32-43-00-860-074-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) On the right center instrument-panel 400VU, make sure that the landing-gear control lever is in the DOWN position.
   (3) On the landing-gear control panel 402VU, make sure that the A/SKID & N/W STRG switch is set to ON.
   (4) On the parking brake panel 110VU, make sure that the PARK BRK control switch is set to OFF.
   (5) On the HYD section of maintenance panel 50VU, make sure that the LEAK MEASUREMENT VALVE/Y pushbutton switch is pushed (OFF legend is off).
   (6) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
   (7) Make sure the level of fluid in the reservoir of the low-pressure braking control-system is correct.
   (8) Pressurize the Yellow hydraulic system with a hydraulic ground power-cart (Ref. AMM TASK 29-10-00-863-002) or with the electric pump (Ref. AMM TASK 29-24-00-863-001) .
   (9) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-00-00-864-001).
Subtask 32-43-00-860-074-C ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) On the right center instrument-panel 400VU, make sure that the landing-gear control lever is in the DOWN position.
   (3) On the landing-gear control panel 402VU, make sure that the A/SKID & N/W STRG switch is set to ON.
   (4) On the parking brake panel 110VU, make sure that the PARK BRK control switch is set to OFF.
   (5) On the HYD section of maintenance panel 50VU, make sure that the LEAK MEASUREMENT VALVE/Y pushbutton switch is pushed (OFF legend is off).
   (6) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
   (7) Pressurize the Yellow hydraulic system with a hydraulic ground power-cart (Ref. AMM TASK 29-10-00-863-002) or with the electric pump (Ref. AMM TASK 29-24-00-863-001).
   (8) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-00-00-864-001).
Subtask 32-43-00-941-062-A
C. Safety Precautions
   (1) Put a WARNING NOTICE(S) in position to tell persons not to:
  • Operate the landing-gear control lever
  • Pressurize the Green hydraulic system.
4. Procedure
Subtask 32-43-00-710-060-B ** ON A/C NOT FOR ALL
A. Get Access to the Label Parameter Call-Up Menus on the MCDU and Do a Check of the Yellow Hydraulic-Pressure of the Left and Right Brakes
ACTION
RESULT
1.Get access to the label-parameter call-up menus (Ref. AMM TASK 31-36-00-740-008).

2.For the Yellow hydraulic pressure of the left brake, enter the label call-up parameters that follow:
EQ/SYS/LAB/SDI = 029/1/113/01 or 029/2/113/01
DATABITS = 12
NOTE: Because different DMU/FDIMUs can be installed, the number for the equipment code (EQ ID code) can be 029 or 29.
NOTE: The two label call-up parameters, left and right, can be shown on the same page at the same time.

3.For the yellow hydraulic pressure of the right brake, enter the label call-up parameters that follow:
EQ/SYS/LAB/SDI = 029/1/113/10 or 029/2/113/10
DATABITS = 12
NOTE: It is important to enter the DATABITS value. It is used for the decimal value calculation. The DATABITS default value is set to 18.

4.Push the line select keys adjacent to the parameters:
  • The parameter label call-up is shown on the Data Field with all the information.
  • The pressure is shown on the line below the DATABITS 12 label.
Subtask 32-43-00-710-061-B ** ON A/C NOT FOR ALL
B. Operational Test of the Alternate Braking with Anti-Skid
ACTION
RESULT
1.Push the two brake pedals on the CAPT or F/O side.
On the MCDU and on the right center instrument-panel 400VU, on brake Yellow hydraulic-pressure triple-indicator:
  • The left and right side pressure-values are shown on the MCDU, and on the right center instrument-panel 400VU, on the brake Yellow pressure triple-indicator.
    The pistons related to the Yellow hydraulic system extend.
NOTE: Refresh is done at intervals of two seconds.
2.Release the brake pedals.
On the MCDU and the triple indicator:
  • The pressure supplied to the brakes decreases to zero.
    The pistons related to the Yellow hydraulic system retract.
3.Slowly push the brake pedals on the CAPT or F/O side.
On the triple indicator and MCDU:
  • The pressure supplied to the brakes increases in relation to the pressure you put on the pedals
  • With the pedals fully pushed, the pressure is between 2400 psi (165.47 bar) and 2700 psi (186.16 bar) on both sides.
Subtask 32-43-00-710-061-C ** ON A/C NOT FOR ALL
B. Operational Test of the Alternate Braking with Anti-Skid
ACTION
RESULT
1.Push the two brake pedals on the CAPT or F/O side.
On the right center instrument-panel 400VU, on the brake Yellow hydraulic-pressure triple-indicator:
  • The left and right side pressure-values are shown.
    The pistons related to the Yellow hydraulic system extend.
2.Release the brake pedals.
On the triple indicator:
  • The pressure supplied to the brakes decreases to zero.
    The pistons related to the Yellow hydraulic system retract.
3.Slowly push the brake pedals on the CAPT or F/O side.
On the triple indicator:
  • The pressure supplied to the brakes increases in relation to the pressure you put on the pedals
  • With the pedals fully pushed, the pressure is between 2400 psi (165.47 bar) and 2700 psi (186.16 bar).
4.Release the brake pedals.

Subtask 32-43-00-710-062-B ** ON A/C NOT FOR ALL
C. Operational Test of the Alternate Braking without Anti Skid
ACTION
RESULT
1.On the landing-gear control panel 402VU, set the A/SKID & N/W STRG switch to OFF.
On the WHEEL page:
  • The STEERING and A/SKID indication comes into view in amber.
    You can hear the single chime.
    On the upper ECAM DU:
  • The BRAKES A/SKID N/WS OFF indication comes into view.
2.Push the two brake pedals on the CAPT or F/O side.
On the MCDU and on the triple indicator:
  • The left and right side pressure-values are shown.
    The pistons related to the Yellow hydraulic system extend.
3.Release the brake pedals.
On the MCDU and on the triple indicator:
  • The pressure supplied to the brakes decreases to zero.
    The pistons related to the Yellow hydraulic system retract.
4.Slowly push the brake pedals on the CAPT or F/O side.
On the triple indicator and MCDU:
  • The pressure supplied to the brakes increases in relation to the pressure you put on the pedals
  • With the pedals fully pushed, the pressure is between 2400 psi (165.47 bar) and 2700 psi (186.16 bar) on the two sides.
5.On the landing-gear control panel 402VU, set the A/SKID & N/W STRG switch to ON.
On the upper ECAM DU, the BRAKES A/SKID N/WS OFF indication goes out of view. On the WHEEL page, the STEERING and A/SKID indication goes out of view.
Subtask 32-43-00-710-063-B ** ON A/C NOT FOR ALL
D. Test of the Hydraulic System
ACTION
RESULT
1.Pressurize the Green hydraulic system
(Ref. AMM TASK 29-23-00-863-001).

2.Fully push the CAPT brake pedals until they touch the stop.
On the MCDU and on the triple-indicator:
  • No pressure indication is shown.
3.On the landing gear control panel 402VU, set the A/SKID & N/W STRG switch to OFF.
On the upper ECAM DU:
  • The BRAKES A/SKID N/WS OFF indication comes into view.
    You can hear the single chime.
4.Fully push the CAPT brake pedals until they touch the stop.
On the MCDU and on the triple-indicator:
  • With the pedals fully pushed, the pressure is between 2400 psi (165.47 bar) and 2700 psi (186.16 bar).
5.On the landing-gear control panel 402VU, set the A/SKID & N/W STRG switch to the ON position, then release the brake pedals.
On the MCDU and on the triple-indicator:
  • The pressure decreases to zero.
    On the upper ECAM DU:
  • The BRAKES A/SKID N/WS OFF indication goes out of view.
Subtask 32-43-00-710-063-C ** ON A/C NOT FOR ALL
D. Test of the Hydraulic System
ACTION
RESULT
1.Pressurize the Green hydraulic system
(Ref. AMM TASK 29-23-00-863-001).

2.Fully push the CAPT brake pedals until they touch the stop.
On the triple indicator:
  • No pressure indications are shown.
3.On the landing gear control panel 402VU, set the A/SKID & N/W STRG switch to OFF.
With the pedal fully pushed, on the triple indicator, the pressure shown is between 870 psi (59.98 bar) and 1160 psi (79.98 bar).
You can hear a single chime. On the upper ECAM DU the the BRAKES A/SKID N/WS OFF indication comes into view.
4.On the landing-gear control panel 402VU, set the A/SKID & N/W STRG switch to ON, then release the brake pedals.
On the triple indicator, the pressure indication decreases to zero.
On the upper ECAM DU, the BRAKES A/SKID N/WS OFF indication goes out of view.
5. Close-up
Subtask 32-43-00-860-075-B
A. Aircraft Maintenance Configuration
   (1) Depressurize the Green and Yellow hydraulic systems.
(Ref. AMM TASK 29-23-00-864-001).
   (2) On the parking brake panel 110VU, set the PARK BRK control switch to ON.
   (3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
Subtask 32-43-00-942-063-A
B. Removal of the Equipment
   (1) Remove the WARNING NOTICE(S).
   (2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:22:06 UTC
"WTRUIB" 2025