DOC AIRBUS | AMM A320FInstallation of the Braking/Steering Control Unit (BSCU)
TASK 32-42-34-400-001-A
Installation of the Braking/Steering Control Unit (BSCU)
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 32-42-34-860-050-A
Subtask 32-42-34-420-050-A
Subtask 32-42-34-862-050-A
[Rev.10 from 2021]
2026.04.01 00:48:05 UTC
Installation of the Braking/Steering Control Unit (BSCU)
FIN: 10GG
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 811 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 22-97-00-710-001-A | Operational Test of the LAND CAT III Capability |
| 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 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
| TASK 32-42-00-710-001-A | Operational Check of the Normal Braking System |
| TASK 32-46-00-610-001-A | BITE Test of the BSCU - Selection of the Pin Programming |
| TASK 32-46-00-740-001-A | BITE Test of the BSCU |
| TASK 32-46-00-740-003-A | BITE Test of the BSCU - LRU Identification |
| TASK 32-51-00-720-003-A | Functional Test of the Nose Wheel Steering with the Handwheel |
| 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) |
Braking/Steering Control Unit (BSCU)Subtask 32-42-34-860-050-A
A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 811.
(4) Make sure that the access door 811 is open.
Subtask 32-42-34-865-051-A (1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 811.
(4) Make sure that the access door 811 is open.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** 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 |
Subtask 32-42-34-420-050-A
A. Installation of the BSCU
(1) Clean the component interface and/or the adjacent area.
(2) Do a visual inspection of the component interface and/or the adjacent area.
(3) Remove the blanking caps from the electrical connectors.
(4) Make sure that the electrical connectors are clean and in the correct conditions.
(5) Install the BSCU (1) on its rack (3).
(6) Push the BSCU (1) on its rack (3) to connect the electrical connectors (2).
(7) Engage the nuts (4) on the lugs (5) and tighten.
(8) Make sure that the OBRMs are correctly installed. If they are not installed correctly, push the OBRMs until the locking devices are locked.
Subtask 32-42-34-865-052-A (1) Clean the component interface and/or the adjacent area.
(2) Do a visual inspection of the component interface and/or the adjacent area.
(3) Remove the blanking caps from the electrical connectors.
(4) Make sure that the electrical connectors are clean and in the correct conditions.
(5) Install the BSCU (1) on its rack (3).
(6) Push the BSCU (1) on its rack (3) to connect the electrical connectors (2).
(7) Engage the nuts (4) on the lugs (5) and tighten.
(8) Make sure that the OBRMs are correctly installed. If they are not installed correctly, push the OBRMs until the locking devices are locked.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-42-34-610-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** 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 |
C. Do the selection of the pin programming of the BSCU in relation to the type of brakes and tires related to the aircraft pin programming (Ref. AMM TASK 32-46-00-610-001).
Subtask 32-42-34-610-050-B ** ON A/C NOT FOR ALL NOTE: Refer to the reference of the pin programming on the LRU IDENTIFICATION page printed before removal of the BSCU.
C. Check of the BSCU pin programming
(1) Do the LRU IDENTIFICATION selection (Ref. AMM TASK 32-46-00-740-003).
(2) Make sure that the pin programming of the BSCU is the same as the pin programming printed before removal and/or in relation with the type of brakes and tires.
Subtask 32-42-34-710-050-A (1) Do the LRU IDENTIFICATION selection (Ref. AMM TASK 32-46-00-740-003).
(2) Make sure that the pin programming of the BSCU is the same as the pin programming printed before removal and/or in relation with the type of brakes and tires.
D. BITE Test
(1) Do the BITE test of the BSCU (Ref. AMM TASK 32-46-00-740-001).
(b) Do the LAND TEST (CAT 3 CAPABILITY) (Ref. AMM TASK 22-97-00-710-001).
5. Close-up(1) Do the BITE test of the BSCU (Ref. AMM TASK 32-46-00-740-001).
NOTE: If the airline operates the aircraft in CAT 3 conditions, do the LAND CAT 3 capability test:
(a) Make sure that the CAT 3 DUAL INOP indication is not shown on the lower ECAM DU with the FADEC GND PWR 1 and 2 pushbutton switches (maintenance panel 50VU) pushed (ON legends on) and the 3 IRs aligned (Ref. AMM TASK 34-10-00-860-004). (b) Do the LAND TEST (CAT 3 CAPABILITY) (Ref. AMM TASK 22-97-00-710-001).
NOTE: As an alternative procedure, you can do this test without the CFDS (Ref. AMM TASK 32-42-00-710-001) and (Ref. AMM TASK 32-51-00-720-003).
(2) On the center pedestal, on the MCDU, do the LRU IDENTIFICATION of the BSCU (Ref. AMM TASK 32-46-00-740-003). Subtask 32-42-34-862-050-A
A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
Subtask 32-42-34-410-050-A (1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 811.
(3) Remove the access platform(s).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 811.
(3) Remove the access platform(s).