Reactivation of Main Wheel Brakes

TASK 32-42-00-440-003-A
Reactivation of Main Wheel Brakes

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 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.

1. Reason for the Job
MMEL 32-42-01A
MAIN WHEEL BRAKE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
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 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 32-11-12-400-001-A	Installation of the MLG Hydraulic Dressings
TASK 32-41-11-000-006-A	Removal of the MLG Wheel
TASK 32-41-11-400-006-A	Installation of the MLG Wheel
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
TASK 32-42-27-400-001-A	Installation of the Brake
TASK 32-43-00-710-001-A	Operational Check of Alternate Braking System
TASK 32-43-00-870-002-A	Bleeding of the High Pressure Alternate Braking System
Deactivation without Brake Removal ** ON A/C NOT FOR ALL
Deactivation without Brake Removal ** ON A/C NOT FOR ALL
Deactivation with Brake Removal ** ON A/C NOT FOR ALL
Deactivation with Brake Removal ** ON A/C NOT FOR ALL
Deactivation/Reactivation of the Wheel Brake with Disconnection of the Flexible Hoses if there is a Leak

3. Job Set-up
Subtask 32-42-00-941-062-A

A. Safety Precautions
(1) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the landing gear control lever and the brake pedals.

Subtask 32-42-00-860-071-A

B. Aircraft Maintenance Configuration
(1) Depressurize the Green and Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-001) and (Ref. AMM TASK 29-10-00-864-002).
(2) Parking brake configuration

CAUTION: MAKE SURE THAT ALL THE PISTONS OF THE BRAKE ARE IN THE RELEASED POSITION.

(a) Make sure that the PARKING BRK control switch is set to OFF (released) before you do the reactivation.

4. Procedure
Subtask 32-42-00-440-052-A

A. Reactivation after Deactivation without Removal of the Brake
(1) Cut and remove the lockwire that attaches the two knurled sleeves (1) and (4).
(2) Remove the self-adhesive fabric tape from the sleeves (1) and (4).
(3) Connect the sleeves (1) and (4) to the half couplings (2) and (3).
(4) Bleed the brake unit (Ref. AMM TASK 32-42-00-870-001) (Ref. AMM TASK 32-43-00-870-002).

Subtask 32-42-00-440-053-A

B. Reactivation after Deactivation with Removal of the Brake

Deactivation with Brake Removal ** ON A/C NOT FOR ALL

(1) Remove the wheel of the related main landing gear (Ref. AMM TASK 32-41-11-000-006).
(2) Cut and remove the lockwire that attaches:

The two knurled sleeves (4) and (12),
The electrical connector (9) of the brake temperature sensor.

(3) Install the brake unit (3) (Ref. AMM TASK 32-42-27-400-001).
(4) Install the wheel of the related main landing gear (Ref. AMM TASK 32-41-11-400-006).

Subtask 32-42-00-440-058-A

C. Reactivation of the Wheel Brake with Disconnection of the Flexible Hoses from the Normal and Alternate Braking System if there is a Leak

Deactivation/Reactivation of the Wheel Brake with Disconnection of the Flexible Hoses if there is a Leak

(1) Depressurize the Green and Yellow hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-001).
(2) Remove the blanking caps from the unions (7) and (8).
(3) If removed, install the flexible hose (5) on the flexible hose (2) connection and on the union (7) (Ref. AMM TASK 32-11-12-400-001).
(4) If removed, install the flexible hose (2) on the brake hydraulic self-sealing-coupling and on the flexible hose (5) connection (Ref. AMM TASK 32-11-12-400-001).
(5) If removed, install the flexible hose (6) on the flexible hose (1) connection and on the union (8) (Ref. AMM TASK 32-11-12-400-001).
(6) If removed, install the flexible hose (1) on the brake hydraulic self-sealing-coupling and on the flexible hose (6) connection (Ref. AMM TASK 32-11-12-400-001).
(7) Bleed the brake unit (Ref. AMM TASK 32-42-00-870-001) (Ref. AMM TASK 32-43-00-870-002).
(8) Pressurize the Green and Yellow hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).

Subtask 32-42-00-710-064-A

D. Test
(1) Do the operational check of the normal braking system (Ref. AMM TASK 32-42-00-710-001).
(2) Do an operational check of the alternate braking system (Ref. AMM TASK 32-43-00-710-001).
(3) During these tests, make sure that there are no leaks on the hydraulic connections.

5. Close-up
Subtask 32-42-00-860-072-A

A. Put the aircraft back to its initial configuration.
(1) Depressurize the Green and Yellow hydraulic systems (Ref. AMM TASK 29-10-00-864-001) and (Ref. AMM TASK 29-10-00-864-002).
(2) Make sure that the level of the fluid in the Green and Yellow hydraulic reservoirs is correct.
Add some fluid if it is necessary (Ref. AMM TASK 12-12-29-611-001).
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(4) Remove the WARNING NOTICE(S).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 12:31:32 UTC