DOC AIRBUS | AMM A320FOperational Check to start the Functional Test of the Alternate Braking Automatically (flight simulated)
TASK 32-43-00-710-002-A
Operational Check to start the Functional Test of the Alternate Braking Automatically (flight simulated)
To start the Alternate-Braking functional test.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 32-43-00-941-060-A ** ON A/C NOT FOR ALL
Subtask 32-43-00-710-059-A ** ON A/C NOT FOR ALL
Subtask 32-43-00-942-061-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:32:06 UTC
Operational Check to start the Functional Test of the Alternate Braking Automatically (flight simulated)
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 SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND RELATED DOORS
- COMPONENTS THAT MOVE.
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 JobTo start the Alternate-Braking functional test.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| 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 29-24-00-863-001-A | Pressurize the Yellow Hydraulic System with the Electric Pump |
| TASK 29-24-00-864-001-A | Depressurize the Yellow Hydraulic System |
| TASK 31-50-00-710-002-A | Operational Test of the Flight Warning Computer (FWC) |
| TASK 32-00-00-860-001-A | Flight Configuration Precautions with Electrical Power |
| TASK 32-00-00-860-001-A-01 | Flight Configuration Precautions without Electrical Power |
| TASK 32-00-00-860-002-A | Ground Configuration after Flight Configuration with Electrical Power |
| TASK 32-00-00-860-002-A-01 | Ground Configuration after Flight Configuration without Electrical Power |
| TASK 32-46-00-740-002-A | BITE Test of the BSCU - Ground Scanning |
| TASK 34-10-00-860-005-A | ADIRS Stop Procedure |
Subtask 32-43-00-941-060-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that the wheel chocks are in position.
(2) Put the SAFETY BARRIER(S) in position around the landing gears.
(3) In the cockpit, on the panel 400VU, make sure that the L/G normal control lever 6GA is at DOWN.
(4) Make sure that the free-fall control handle is in the normal position.
(5) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate:
Subtask 32-43-00-860-067-A ** ON A/C NOT FOR ALL (1) Make sure that the wheel chocks are in position.
(2) Put the SAFETY BARRIER(S) in position around the landing gears.
(3) In the cockpit, on the panel 400VU, make sure that the L/G normal control lever 6GA is at DOWN.
(4) Make sure that the free-fall control handle is in the normal position.
(5) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate:
- the landing gear control lever,
- the brake pedals.
B. Aircraft Maintenance Configuration
(1) On the nose gear leg, make sure that the towing lever is in the normal (engaged) position.
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) On the panel 110VU, put the PARK BRK control switch in the OFF position.
(4) On the panel 402VU, make sure that the A/SKID & NOSE WHEEL switch is at ON.
(5) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(6) On the overhead panel 40VU, make sure that the PTU pushbutton switch is at OFF (the OFF legend is on).
(7) Make sure that the ADIRS are stopped (Ref. AMM TASK 34-10-00-860-005).
Subtask 32-43-00-860-072-A ** ON A/C NOT FOR ALL (1) On the nose gear leg, make sure that the towing lever is in the normal (engaged) position.
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) On the panel 110VU, put the PARK BRK control switch in the OFF position.
(4) On the panel 402VU, make sure that the A/SKID & NOSE WHEEL switch is at ON.
(5) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(6) On the overhead panel 40VU, make sure that the PTU pushbutton switch is at OFF (the OFF legend is on).
(7) Make sure that the ADIRS are stopped (Ref. AMM TASK 34-10-00-860-005).
C. Do the flight configuration precautions with electrical power procedure (Ref. AMM TASK 32-00-00-860-001).
Subtask 32-43-00-865-055-A ** ON A/C NOT FOR ALL D. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 49VU | ANTI ICE/PROBES/AOA/1 | 4DA1 | D04 |
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| 49VU | CAPT/LOUD/SPKR | 5WW | F10 |
| 121VU | EIS/F/O/LOUD/SPKR | 4WW | P08 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| 122VU | ANTI ICE/PROBES/2/TAT | 1DA2 | Y15 |
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| 122VU | ANTI ICE/PROBES/2/AOA | 4DA2 | Y13 |
| 122VU | ANTI ICE/PROBES/2/STATIC | 5DA2 | Y11 |
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |
| 122VU | ANTI ICE/PROBES/3/AOA | 4DA3 | Z15 |
| 122VU | ANTI ICE/PROBES/3/STATIC | 5DA3 | Z14 |
| 122VU | ANTI ICE/PROBES/1/STATIC | 5DA1 | Z13 |
| 122VU | ANTI ICE/PROBES/1/TAT | 1DA1 | Z12 |
Subtask 32-43-00-710-059-A ** ON A/C NOT FOR ALL
A. Operational Check to Start the Alternate-Braking Functional Test
(1) Ignore the L/G NORM CTL LEVER (6GA)/BSCU (10GG) message that comes into view because of the aircraft configuration.
(2) Do a reset of the BSCU (10GG):
(a) Set the A/SKID & N/W STRG switch to OFF, then to ON.
Subtask 32-43-00-860-069-A ** ON A/C NOT FOR ALL (1) Ignore the L/G NORM CTL LEVER (6GA)/BSCU (10GG) message that comes into view because of the aircraft configuration.
(2) Do a reset of the BSCU (10GG):
(a) Set the A/SKID & N/W STRG switch to OFF, then to ON.
| ACTION | RESULT |
|---|---|
| On the ECAM control panel: 1.Push the HYD pushbutton switch to get the HYD page on the lower ECAM DU. | On the lower ECAM DU, the HYD page comes into view. |
| 2.Pressurize the Yellow hydraulic system with the electric pump (Ref. AMM TASK 29-24-00-863-001). | On the lower ECAM display unit, make sure that the Yellow hydraulic system is pressurized. |
| 3.Five seconds after the pressurization of the Yellow hydraulic system, the functional test of the alternate braking starts and operates for approximately 20 seconds. | On panel 400VU, the Yellow brake-pressure triple-indicator (60GG) shows the left and right side pressure values which change from 101 bar (1464.8808 psi) to the return pressure and from 70 bar (1015.2639 psi) to the return pressure many times for approximately 20 seconds. NOTE: This change of the Yellow hydraulic pressure shows that the functional test of the alternate-braking started correctly. |
B. Aircraft Maintenance Configuration
(1) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
Subtask 32-43-00-865-056-A ** ON A/C NOT FOR ALL (1) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-43-00-860-073-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 49VU | ANTI ICE/PROBES/AOA/1 | 4DA1 | D04 |
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| 49VU | CAPT/LOUD/SPKR | 5WW | F10 |
| 121VU | EIS/F/O/LOUD/SPKR | 4WW | P08 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| 122VU | ANTI ICE/PROBES/2/TAT | 1DA2 | Y15 |
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| 122VU | ANTI ICE/PROBES/2/AOA | 4DA2 | Y13 |
| 122VU | ANTI ICE/PROBES/2/STATIC | 5DA2 | Y11 |
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |
| 122VU | ANTI ICE/PROBES/3/AOA | 4DA3 | Z15 |
| 122VU | ANTI ICE/PROBES/3/STATIC | 5DA3 | Z14 |
| 122VU | ANTI ICE/PROBES/1/STATIC | 5DA1 | Z13 |
| 122VU | ANTI ICE/PROBES/1/TAT | 1DA1 | Z12 |
D. Do the ground configuration after flight configuration with electrical power procedure (Ref. AMM TASK 32-00-00-860-002).
Subtask 32-43-00-740-050-A ** ON A/C NOT FOR ALL E. Test
(1) Do the operational test of the Flight Warning Computer (FWC) (Ref. AMM TASK 31-50-00-710-002).
(2) Do the BITE test of the BSCU 1 & 2 (Ground Scanning) (Ref. AMM TASK 32-46-00-740-002).
(3) Make sure that the MCDU shows no maintenance message related to the Alternate braking system.
5. Close-up(1) Do the operational test of the Flight Warning Computer (FWC) (Ref. AMM TASK 31-50-00-710-002).
(2) Do the BITE test of the BSCU 1 & 2 (Ground Scanning) (Ref. AMM TASK 32-46-00-740-002).
(3) Make sure that the MCDU shows no maintenance message related to the Alternate braking system.
Subtask 32-43-00-942-061-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the safety barriers.
(1) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the safety barriers.