DOC AIRBUS | AMM A320FOperational Check of Alternate Braking System
TASK 32-43-00-710-001-A
Operational Check of Alternate Braking System
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 32-43-00-865-053-A
Subtask 32-43-00-710-054-B ** ON A/C NOT FOR ALL
Subtask 32-43-00-942-058-A
[Rev.10 from 2021]
2026.04.01 00:48:40 UTC
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.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | WARNING NOTICE(S) |
| 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 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
Subtask 32-43-00-865-053-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 32-43-00-860-055-B ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/Y BRK/PRESS/IND | 61GG | C10 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | ABCU &/Y BRK/PRESS IND | 61GG | C10 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
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 A/SKID & NOSE WHEEL section of landing-gear control and indicating panel 402VU, make sure that the switch is in the ON position.
(4) On the PARKING BRK section of RUD trim/parking brake panel 110VU, make sure that the control switch is in the OFF position.
(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 that 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 32-43-00-860-055-C ** ON A/C NOT FOR ALL (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 A/SKID & NOSE WHEEL section of landing-gear control and indicating panel 402VU, make sure that the switch is in the ON position.
(4) On the PARKING BRK section of RUD trim/parking brake panel 110VU, make sure that the control switch is in the OFF position.
(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 that 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).
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 A/SKID & NOSE WHEEL section of landing-gear control and indicating panel 402VU, make sure that the switch is in the ON position.
(4) On the PARKING BRK section of RUD trim/parking brake panel 110VU, make sure that the control switch is in the OFF position.
(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 32-43-00-941-056-A (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 A/SKID & NOSE WHEEL section of landing-gear control and indicating panel 402VU, make sure that the switch is in the ON position.
(4) On the PARKING BRK section of RUD trim/parking brake panel 110VU, make sure that the control switch is in the OFF position.
(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).
C. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to:
4. Procedure(1) Put the WARNING NOTICE(S) in position to tell persons not to:
- operate the landing gear control lever,
- pressurize the Green hydraulic system.
Subtask 32-43-00-710-054-B ** ON A/C NOT FOR ALL
A. Operational Test of the Alternate Braking with or without Anti Skid
Subtask 32-43-00-710-055-A ** ON A/C NOT FOR ALL | ACTION | RESULT |
|---|---|
| 1.Push in the two brake pedals on the CAPT or F/O side. | On the panel 400VU, the brake yellow pressure triple indicator shows the left and right side pressure values. The pistons related to the Yellow hydraulic system are extended. |
| 2.Release the brake pedals. | The triple indicator shows that the pressure supplied to the brakes decreases to zero. The pistons related to the Yellow hydraulic system are retracted. |
| 3.Slowly push the brake pedals on the CAPT or F/O side. | On the panel 400VU:
|
| 4.On the 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 display unit the BRAKES A/SKID N/WS OFF indication comes into view. |
| 5.Do the same steps as in paragraphs 1 to 3. | You must get the same results. |
| 6.On the panel 402VU, set the A/SKID & N/W STRG switch to ON. | On the upper ECAM display unit, the BRAKES A/SKID N/WS OFF indication goes out of view. On the WHEEL page the STEERING and A/SKID indication go out of view. |
B. Test of the Hydraulic System
Subtask 32-43-00-710-054-C ** ON A/C NOT FOR ALL | ACTION | RESULT |
|---|---|
| 1.Pressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-863-001). | |
| 2.Fully push in the CAPT brake pedals until they touch the stop. | On the panel 400VU, the triple indicator shows no pressure indications. |
| 3.On the panel 402VU, set the A/SKID & N/W STRG switch to OFF. | On the triple indicator, the pressure shown at full pedal movement is between 2400 psi (165.4742 bar) and 2700 psi (186.1584 bar). You can hear the single chime. On the upper ECAM display unit the BRAKES A/SKID N/WS OFF indication comes into view. |
| 4.On the panel 402VU, set the A/SKID & N/W STRG switch to ON position then release the brake pedals. | The pressure indication on the triple indicator goes to zero. On the upper ECAM display unit the BRAKES A/SKID N/WS OFF indication goes out of view. |
C. Operational Test of the Alternate Braking with Anti Skid
Subtask 32-43-00-710-055-B ** ON A/C NOT FOR ALL | ACTION | RESULT |
|---|---|
| 1.Push in the two brake pedals on the CAPT or F/O side. | On the panel 400VU, the brake yellow pressure triple indicator shows the left and right side pressure values. The pistons related to the Yellow hydraulic system are extended. |
| 2.Release the brake pedals. | The triple indicator shows that the pressure supplied to the brakes decreases to zero. The pistons related to the Yellow hydraulic system are retracted. |
| 3.Slowly push the brake pedals on the CAPT or F/O side. | On the panel 400VU:
|
| 4.Release the brake pedals. | |
D. Test of the Hydraulic System
Subtask 32-43-00-860-054-A | ACTION | RESULT |
|---|---|
| 1.Pressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-863-001). | |
| 2.Fully push in the CAPT brake pedals until they touch the stop. | On the panel 400VU, the triple indicator shows no pressure indications. |
| 3.On the panel 402VU, set the A/SKID & N/W STRG switch to OFF. | On the triple indicator, the pressure shown at full pedal movement is between 870 psi (59.9844 bar) and 1160 psi (79.9792 bar). You can hear the single chime. On the upper ECAM display unit the BRAKES A/SKID N/WS OFF indication comes into view. |
| 4.On the panel 402VU, set the A/SKID & N/W STRG switch to ON position then release the brake pedals. | The pressure indication on the triple indicator goes to zero. On the upper ECAM display unit the BRAKES A/SKID N/WS OFF indication goes out of view. |
E. Aircraft Maintenance Configuration
(1) Depressurize the Green and Yellow hydraulic systems (Ref. AMM TASK 29-23-00-864-001).
(2) On the panel 110VU, put the PARK BRK control switch at ON.
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
5. Close-up(1) Depressurize the Green and Yellow hydraulic systems (Ref. AMM TASK 29-23-00-864-001).
(2) On the panel 110VU, put the PARK BRK control switch at ON.
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
Subtask 32-43-00-942-058-A
A. Removal of Equipment
(1) Remove the warning notice(s).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(1) Remove the warning notice(s).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).