DOC AIRBUS | AMM A320FInstallation of the Normal-Brake Pressure Transducer
TASK 32-42-21-400-001-A
Installation of the Normal-Brake Pressure Transducer
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 32-42-21-941-053-A
Subtask 32-42-21-420-052-A
Subtask 32-42-21-942-050-A
[Rev.10 from 2021]
2026.04.01 12:31:52 UTC
Installation of the Normal-Brake Pressure Transducer
WARNING:
MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
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:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.02ABA1) | Phosphate Ester Hydraulic Fluid-General Power - - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 3 | O-RING | AIPC 32-42-21-01-010 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-23-00-860-002-A | Connection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 32-00-00-481-001-A | Installation of the Safety Devices on the Landing Gears |
| TASK 32-42-00-710-001-A | Operational Check of the Normal Braking System |
| TASK 32-42-00-870-001-A | Bleeding of the Normal Braking at the Brake Units |
Normal-Brake Pressure TransducerSubtask 32-42-21-941-053-A
A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:
Subtask 32-42-21-860-052-A (1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:
- make sure that the landing-gear control-lever 6GA is in the DOWN position
- make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the landing gear.
B. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the applicable zone 733 or 743.
(2) Make sure the isolation coupling of the PTU is disconnected (Ref. AMM TASK 29-23-00-860-001).
(3) Make sure that the Yellow and Green hydraulic systems are de-pressurized (Ref. AMM TASK 29-10-00-864-001).
(4) Make sure that the applicable hydraulic reservoir has been depressurized (Ref. AMM TASK 29-14-00-614-001).
Subtask 32-42-21-865-051-A (1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the applicable zone 733 or 743.
(2) Make sure the isolation coupling of the PTU is disconnected (Ref. AMM TASK 29-23-00-860-001).
(3) Make sure that the Yellow and Green hydraulic systems are de-pressurized (Ref. AMM TASK 29-10-00-864-001).
(4) Make sure that the applicable hydraulic reservoir has been depressurized (Ref. AMM TASK 29-14-00-614-001).
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** 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 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
Subtask 32-42-21-420-052-A
A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Remove the PLUG - BLANKING from the opening of the normal brake manifold and the pressure transducer.
(4) Do an inspection of the component interfaces and the adjacent area.
(5) Make sure that the hydraulic line end-fittings are serviceable.
(6) Lubricate the new AIPC 32-42-21-01-010 O-RING (3) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(7) Install the O-ring (3) in the groove on the interface of the pressure transducer (2).
Subtask 32-42-21-420-050-A (1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Remove the PLUG - BLANKING from the opening of the normal brake manifold and the pressure transducer.
(4) Do an inspection of the component interfaces and the adjacent area.
(5) Make sure that the hydraulic line end-fittings are serviceable.
(6) Lubricate the new AIPC 32-42-21-01-010 O-RING (3) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(7) Install the O-ring (3) in the groove on the interface of the pressure transducer (2).
B. Installation of the Normal Brake Pressure-Transducer
(1) Put the pressure transducer (2) in position on the normal brake manifold and install the bolts (4).
(2) TORQUE the bolts (4) to between 0.495 and 0.405 m.daN (43.81 and 35.84 lbf.in )
.
Subtask 32-42-21-760-050-A (1) Put the pressure transducer (2) in position on the normal brake manifold and install the bolts (4).
(2) TORQUE the bolts (4) to between 0.495 and 0.405 m.daN (43.81 and 35.84 lbf.in )
. C. Electrical Bonding Resistance Test
(1) Use a MILLIOHMMETER ACCURACY 0.005 OHM to measure the bonding resistance between:
(a) The MLG forward pintle bearing and the applicable brake manifold pressure transducer (2). The bonding resistance must be less than 20 milliohms.
(2) Remove the CAP - BLANKING from the electrical connector (1).
(3) Connect the electrical connector (1) to the pressure transducer (2).
Subtask 32-42-21-860-053-A (1) Use a MILLIOHMMETER ACCURACY 0.005 OHM to measure the bonding resistance between:
(a) The MLG forward pintle bearing and the applicable brake manifold pressure transducer (2). The bonding resistance must be less than 20 milliohms.
(2) Remove the CAP - BLANKING from the electrical connector (1).
(3) Connect the electrical connector (1) to the pressure transducer (2).
D. Aircraft Maintenance Configuration
(1) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
Subtask 32-42-21-865-052-A (1) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-42-21-870-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** 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 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
F. Test
(1) Bleed the normal brake system (Ref. AMM TASK 32-42-00-870-001).
(2) Do an operational test of the normal brake system (Ref. AMM TASK 32-42-00-710-001).
(3) Examine the pressure transducer and the component interface for leaks.
5. Close-up(1) Bleed the normal brake system (Ref. AMM TASK 32-42-00-870-001).
(2) Do an operational test of the normal brake system (Ref. AMM TASK 32-42-00-710-001).
(3) Examine the pressure transducer and the component interface for leaks.
Subtask 32-42-21-942-050-A
A. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Remove the SAFETY BARRIER(S).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.