DOC AIRBUS | AMM A320FIntegrity Test of the Braking System
TASK 32-42-00-710-006-A
Integrity Test of the Braking System
To ensure aircraft safety after maintenance work on the wiring
2. Job Set-up Information
A. Referenced Information
3. Job Set-up
Subtask 32-42-00-860-087-A
Subtask 32-42-00-710-066-A
Subtask 32-42-00-860-089-A
[Rev.10 from 2021]
2026.04.01 00:47:36 UTC
Integrity Test of the 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.
WARNING:
MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
1. Reason for the JobTo ensure aircraft safety after maintenance work on the wiring
2. Job Set-up Information
A. 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 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| 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 32-42-00-710-005-A | Operational test of the autobrake deceleration rate arming |
| TASK 32-42-00-720-002-A | Functional Test of the Tachometers and the Anti-Skid System with the Normal Braking System ON |
| TASK 32-43-00-720-002-A | Functional Test of the Anti-Skid System with the Alternate Braking System ON |
| TASK 32-45-00-710-001-A | Operational Check of the Parking Brake System |
| TASK 34-10-00-860-004-A | Inertial Reference (IR) Alignment-Procedure |
| TASK 34-10-00-860-004-A-01 | Automatic Inertial Reference (IR) Alignment-Procedure |
| TASK 34-10-00-860-004-A-02 | Inertial Reference (IR) Alignment-Procedure to do a Check of the Links between each Flight Management and Guidance Computer (FMGC) and the three Air Data/Inertial Reference Units (ADIRUs) |
| TASK 34-10-00-860-005-A | ADIRS Stop Procedure |
Subtask 32-42-00-860-087-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-863-001).
(3) Pressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-863-001).
(4) On the panel 402VU, make sure that the ANTI SKID selector switch is in the ON position.
(5) Make sure that the wheel chocks are in position.
(6) On the panel 110VU, make sure that the PARK BRK control switch is in the OFF position.
(7) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
Subtask 32-42-00-865-069-A (1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-863-001).
(3) Pressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-863-001).
(4) On the panel 402VU, make sure that the ANTI SKID selector switch is in the ON position.
(5) Make sure that the wheel chocks are in position.
(6) On the panel 110VU, make sure that the PARK BRK control switch is in the OFF position.
(7) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
B. Make sure that this(these) circuit breaker(s) is(are) closed:
4. Procedure| 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 |
| 121VU | HYDRAULIC/SOL VALVES/G/Y/PTU | 1801GL | N34 |
Subtask 32-42-00-710-066-A
A. Test of the normal braking system
To do this, do a functional test of the tachometers (Ref. AMM TASK 32-42-00-720-002).
Subtask 32-42-00-860-088-A To do this, do a functional test of the tachometers (Ref. AMM TASK 32-42-00-720-002).
NOTE: Do this test on each wheel.
B. Aircraft Maintenance Configuration
(1) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(2) Make sure that the Yellow hydraulic system is pressurized (Ref. AMM TASK 29-24-00-863-001).
Subtask 32-42-00-710-067-A (1) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(2) Make sure that the Yellow hydraulic system is pressurized (Ref. AMM TASK 29-24-00-863-001).
C. Test of the alternate braking system with antiskid
To do this, do a functional test of the Anti-Skid System with the Alternate Braking System ON (Ref. AMM TASK 32-43-00-720-002).
Subtask 32-42-00-860-090-A Subtask 32-42-00-710-068-A To do this, do a functional test of the Anti-Skid System with the Alternate Braking System ON (Ref. AMM TASK 32-43-00-720-002).
NOTE: Do this test on each wheel.
E. Test of the alternate braking system without antiskid
Subtask 32-42-00-710-070-A | ACTION | RESULT |
|---|---|
| 1.Fully press the two brake pedals. | The pressure read on the Yellow pressure triple indicator is zero on left and right side's. |
| 2.On the panel 402VU, put the A/SKID & N/W STRG switch in the ON and OFF positions. Do this three or four times. | Each time, make sure that the brake Yellow pressure triple indicator shows :
|
| 3.Put the A/SKID & N/W STRG switch in the OFF position. | The triple indicator shows the left and right side pressure values. |
| 4.Release the left pedal. | The indicator does not show the left side pressure value. |
| 5.Push the left pedal. | The indicator shows the left-side pressure value again. |
| 6.Release the right pedal. | The indicator does not show the right side pressure value. |
| 7.Push the right pedal. | The indicator shows the right-side pressure value again. |
| 8.Put the A/SKID & N/W STRG switch to ON and release the pedals. | The brake Yellow pressure triple indicator shows zero pressure on left and right side. |
F. Do the operational test of the autobrake deceleration rate arming (Ref. AMM TASK 32-42-00-710-005).
Subtask 32-42-00-710-069-A 5. Close-upSubtask 32-42-00-860-089-A
A. Put the aircraft back to its initial configuration.
(1) Depressurize the Green and Yellow hydraulic systems after operations of the PTU (Ref. AMM TASK 29-23-00-864-001).
(2) Do ADIRS stop procedure. (Ref. AMM TASK 34-10-00-860-005)
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(4) Remove the WARNING NOTICE(S).
(1) Depressurize the Green and Yellow hydraulic systems after operations of the PTU (Ref. AMM TASK 29-23-00-864-001).
(2) Do ADIRS stop procedure. (Ref. AMM TASK 34-10-00-860-005)
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(4) Remove the WARNING NOTICE(S).