Functional Check of the Automatic Reactivation of the Normal Braking Mode (Parking Brake Applied)

TASK 32-42-00-720-004-A
Functional Check of the Automatic Reactivation of the Normal Braking Mode (Parking Brake Applied)

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.

ZONE: 210
ZONE: 730
ZONE: 744

1. Reason for the Job
Refer to the MPD TASK: 324000-14
FUNCTIONAL CHECK OF THE AUTOMATIC REACTIVATION OF THE NORMAL BRAKING MODE (PARKING BRAKE APPLIED)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
730	LEFT MAIN LANDING GEAR & DOORS
744	MAIN DOOR

C. 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 29-10-00-863-001-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 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-10-00-864-004-A	Depressurize the Brake System
TASK 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
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

3. Job Set-up
Subtask 32-42-00-860-093-A

A. Aircraft Maintenance Configuration
(1) On panel 400VU, make sure that the landing gear control-lever is in DOWN position.
(2) On panel 110VU, make sure that PARKING BRK control-switch is in ON position.
(3) Make sure that the CAPT and F/O brake pedals are released.
(4) On panel 402VU, make sure that A/SKID & N/W STRG switch is in ON position.
(5) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(6) On overhead panel 40VU, put the PTU pushbutton switch in OFF position (the OFF legend is ON).
(7) Pressurize the Green hydraulic system with a hydraulic ground power-cart (Ref. AMM TASK 29-10-00-863-001).
(8) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 32-42-00-941-068-A

B. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear control-lever.

Subtask 32-42-00-010-051-A

C. Get Access
(1) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position in zone 744.

Subtask 32-42-00-865-071-A

D. Make sure that this(these) circuit breaker(s) is(are) closed:

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 NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** 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/PARK BRK/CTL/STBY	71GG	N37
121VU	HYDRAULIC/PARK BRK/CTL/NORM	70GG	N36
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06

4. Procedure
Subtask 32-42-00-720-053-A ** ON A/C NOT FOR ALL

A. Functional Test of Automatic Start of the Normal Braking Mode

ACTION	RESULT
Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (2987.78 psi) (the pointer is in the green zone), and Make sure that the left and right pressure values are shown. On the brake units: Make sure that the pistons, that the Yellow hydraulic system supplies, are in the extended position.
Push the left pedal on the Captain or First Officer side.	On the brake units of the left main gear: Make sure that the pistons related to the Green hydraulic system are retracted, and Make sure that the pistons related to the Yellow hydraulic system are extended.
Release the left pedal on the Captain or First Officer side.	On the brake units of the left main gear: Make sure that the pistons related to the Green hydraulic system are retracted, and Make sure that the pistons related to the Yellow hydraulic system are extended.
Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001) and depressurize the brake system (Ref. AMM TASK 29-10-00-864-004): In the right MLG compartment (zone 744), operate the manual depressurization button on the brake relief valve (3067GM) to release the pressure.	On panel 400VU, on triple indicator 60GG: Make sure that the ACCU PRESS indicator shows zero pressure and that the pressure applied to the brakes is zero. On the brake units: Make sure that the pistons related to the Yellow hydraulic system, are in the retracted position. Make sure that the MEMO "PARK BRK LO PR" indication is shown on the upper ECAM DU.
Push the left pedal on the Captain or First Officer side.	On the brake units of the left main gear: Make sure that the pistons related to the Green hydraulic system are extended, and Make sure that the pistons related to the Yellow hydraulic system are retracted.
Release the left pedal on the Captain or First Officer side.	On the brake units of the left main gear: Make sure that the pistons related to the Green hydraulic system and the pistons related to the Yellow hydraulic system are retracted.
Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple indicator 60GG: Make sure that the pressure of accumulator increases to 206 bar (2987.78 psi) (the pointer is in the green zone), and Make sure that the left and right pressure values are shown. On the brake units: Make sure that the pistons, that the Yellow hydraulic system supplies, are in the extended position.

Subtask 32-42-00-720-053-B ** ON A/C NOT FOR ALL

A. Functional Test of Automatic Start of the Normal Braking mode

ACTION	RESULT
Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (2987.78 psi) (the pointer is in the green zone), and Make sure that the left and right pressure values are shown. On the brake units: Make sure that the pistons related to the Yellow hydraulic system, are in the extended position.
Fully push the left pedal on the Captain or First Officer side.	On the brake units of the left main gear: Make sure that the pistons related to the Yellow hydraulic system are extended, and Make sure that the pistons related to the Green hydraulic system are retracted to increase the pressure.
Release the left pedal on the Captain or First Officer side.	On the brake units of the left main gear: Make sure that the pistons related to the Green hydraulic system are retracted, and Make sure that the pistons related to the Yellow hydraulic system are extended.
Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001) and depressurize the brake system (Ref. AMM TASK 29-10-00-864-004): In the right MLG compartment (zone 744), operate the manual depressurization button on the brake relief valve (3067 GM) to release the pressure.	On panel 400VU, on triple indicator 60GG: Make sure that the ACCU PRESS indicator shows zero pressure and that pressure applied to the brakes is zero. On the brake units: Make sure that the pistons, that the Yellow hydraulic system supplies, are in the retracted position. Make sure that the MEMO "PARK BRK LO PR" indication is shown on the upper ECAM DU.
Push the left pedal on the Captain or First Officer side.	On the brake units of the left main gear: Make sure that the pistons related to the Green hydraulic system are extended, and Make sure that the pistons related to the Yellow hydraulic system are retracted.
Release the left pedal on the Captain or First Officer side.	On the brake units of the left main gear, make sure that the pistons related to the Green hydraulic system and the pistons related to the Yellow hydraulic system are retracted.
Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (2987.78 psi) (the pointer is in the green zone), and Make sure that the left and right pressure values are shown. On the brake units: Make sure that the pistons, that the Yellow hydraulic system supplies, are in the extended position.

5. Close-up
Subtask 32-42-00-860-094-A

A. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).
(3) Depressurize the Yellow hydraulic system
(Ref. AMM TASK 29-10-00-864-002).
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(5) On overhead panel 40VU, push and release the PTU pushbutton switch. Make sure that the OFF legend goes off.

Subtask 32-42-00-942-061-A

B. Removal of Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) Put the aircraft back to its initial configuration.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

Subtask 32-42-00-410-051-A

C. Close Access
(1) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).

[Rev.10 from 2021] 2026.04.01 00:47:37 UTC