DOC AIRBUS | AMM A320FOperational Test of the Automatic Braking when the Landing Gear is retracted
TASK 32-42-00-710-004-A
Operational Test of the Automatic Braking when the Landing Gear is retracted
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 32-42-00-860-050-A
Subtask 32-42-00-710-060-A
Subtask 32-42-00-860-052-A
[Rev.10 from 2021]
2026.04.02 06:22:00 UTC
Operational Test of the Automatic Braking when the Landing Gear is retracted
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 JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| 98F32304000000 | 3 | TARGET-FALSE |
| 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 29-10-00-863-001-A | Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart |
| 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 32-00-00-481-001-A | Installation of the Safety Devices on the Landing Gears |
| TASK 32-00-00-481-002-A | Installation of the Safety Devices on the Landing Gear Doors |
| 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 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
| TASK 32-22-00-010-001-A | Nose Gear Doors - Ground Doors Opening |
| TASK 32-22-00-410-001-A | Nose Gear Doors - Ground Doors Closing |
| TASK 34-10-00-860-005-A | ADIRS Stop Procedure |
Subtask 32-42-00-860-050-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On the panel 400VU, make sure that the L/G normal control lever 6GA is at DOWN.
(3) Make sure that the free fall control handle assembly is in the normal position.
(4) Make sure that the wheel chocks are in position.
(5) On the panel 110VU, make sure that the PARK BRK control switch is in the OFF position.
(6) On the panel 402VU, make sure that the A/SKID & NOSE WHEEL switch is at ON.
(7) Open the MLG and NLG doors (Ref. AMM TASK 32-12-00-010-001), (Ref. AMM TASK 32-22-00-010-001).
(8) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).
(9) Make sure that the ADIRS are stopped (Ref. AMM TASK 34-10-00-860-005).
Subtask 32-42-00-941-058-A (1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On the panel 400VU, make sure that the L/G normal control lever 6GA is at DOWN.
(3) Make sure that the free fall control handle assembly is in the normal position.
(4) Make sure that the wheel chocks are in position.
(5) On the panel 110VU, make sure that the PARK BRK control switch is in the OFF position.
(6) On the panel 402VU, make sure that the A/SKID & NOSE WHEEL switch is at ON.
(7) Open the MLG and NLG doors (Ref. AMM TASK 32-12-00-010-001), (Ref. AMM TASK 32-22-00-010-001).
(8) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).
(9) Make sure that the ADIRS are stopped (Ref. AMM TASK 34-10-00-860-005).
B. Safety Precaution
(1) Make sure that the safety devices are installed on the NLG and MLG (Ref. AMM TASK 32-00-00-481-001).
(2) Make sure that the safety devices are installed on the NLG and MLG doors (Ref. AMM TASK 32-00-00-481-002).
Subtask 32-42-00-865-058-A (1) Make sure that the safety devices are installed on the NLG and MLG (Ref. AMM TASK 32-00-00-481-001).
(2) Make sure that the safety devices are installed on the NLG and MLG doors (Ref. AMM TASK 32-00-00-481-002).
C. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 32-42-00-860-051-A 4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/Y BRK/PRESS/IND | 61GG | C10 |
| ** ON A/C ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| ** 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/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
Subtask 32-42-00-710-060-A
A. Automatic Braking when the Landing Gear is Retracted
(1) Do a reset of the BSCU:
(a) On panel 402VU, set the A/SKID & N/W STRG switch to OFF, then to ON.
(2) Install the 98F32304000000 TARGET-FALSE on weight-on-wheels proximity sensors 20GA, 21GA, 22GA, 23GA, 24GA and 25GA.
(3) Remove the 98F32304000000 TARGET-FALSE from weight-on-wheels proximity sensors 20GA, 21GA, 22GA, 23GA, 24GA and 25GA.
5. Close-up(1) Do a reset of the BSCU:
(a) On panel 402VU, set the A/SKID & N/W STRG switch to OFF, then to ON.
(2) Install the 98F32304000000 TARGET-FALSE on weight-on-wheels proximity sensors 20GA, 21GA, 22GA, 23GA, 24GA and 25GA.
| ACTION | RESULT |
|---|---|
| 1.Make sure that the brake pedals are released and put L/G normal lever 6GA to UP position. NOTE: Ignore the warnings when you put L/G lever (6GA) to UP position. | Make sure that the Green system pistons on the brake units extend for approximately three seconds and then retract. |
| 2.Put L/G control lever (6GA) to DOWN position. | |
NOTE: If it is necessary to do the test again, it is important to:
- First remove all the 98F32304000000 TARGET-FALSE after the L/G control lever (6GA) is set to DOWN position
- Then do steps (1) to (3) again.
Subtask 32-42-00-860-052-A
A. Put the aircraft back to the serviceable condition.
(1) Put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).
(2) Close the NLG and MLG doors (Ref. AMM TASK 32-12-00-410-001), (Ref. AMM TASK 32-22-00-410-001).
(3) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).
(4) De-energize the aircraft electrical circuits. (Ref. AMM TASK 24-41-00-862-002)
(1) Put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).
(2) Close the NLG and MLG doors (Ref. AMM TASK 32-12-00-410-001), (Ref. AMM TASK 32-22-00-410-001).
(3) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).
(4) De-energize the aircraft electrical circuits. (Ref. AMM TASK 24-41-00-862-002)