Operational Check of the Parking Brake System

TASK 32-45-00-710-001-A
Operational Check of the Parking Brake System

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 ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

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 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.

ZONE: 210
ZONE: 711
ZONE: 730
ZONE: 740

1. Reason for the Job
Refer to the MPD TASK: 324500-01
OPERATIONAL CHECK OF THE PARKING BRAKE SYSTEM
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	CHOCK - WHEEL(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.08 and 0.05 m.daN (7.08 and 4.42 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
711	NOSE GEAR
730	LEFT MAIN LANDING GEAR & DOORS
740	RIGHT MAIN LANDING GEAR & DOORS

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 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
TASK 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 32-46-00-740-002-A	BITE Test of the BSCU - Ground Scanning
Parking Brake Electrical Control Valve - Circuit Breakers ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-45-00-860-051-A

A. Aircraft Maintenance Configuration
(1) On panel 400VU, make sure that the landing gear control-lever is in the DOWN position.
(2) Make sure that the CHOCK - WHEEL(S) are in position.
(3) On panel 110VU, set the PARKING BRK control-switch to OFF position.
(4) Make sure that the CAPT and F/O brake pedals are released.
(5) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(6) Pressurize the Yellow hydraulic system with the electrical pump (Ref. AMM TASK 29-24-00-863-001).
(a) On panel 400VU, on triple pressure indicator 60GG, make sure that the pressure of the accumulator increases until 206 bar (3000 psi) (the indicator pointer is in the green range).

Subtask 32-45-00-010-050-A ** ON A/C NOT FOR ALL

B. 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 32-45-00-941-050-A

C. Safety Precautions
(1) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate:

The landing-gear control lever
The brake pedals.

Subtask 32-45-00-865-050-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/PARK BRK/CTL/STBY	71GG	N37
121VU	HYDRAULIC/PARK BRK/CTL/NORM	70GG	N36
121VU	HYDRAULIC/SOL VALVES/G/Y/PTU	1801GL	N34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 32-45-00-210-051-A ** ON A/C NOT FOR ALL

E. In zone 744, on the parking-brake electrical control-valve 72GG, make sure that the two circuit breakers are closed:

circuit breaker closed, you must see a black tape through the transparent cover (2)
circuit breaker open, you must see a white tape through the transparent cover (2).
Parking Brake Electrical Control Valve - Circuit Breakers ** ON A/C NOT FOR ALL

NOTE: If you cannot see the circuit breakers through the transparent covers (2) because they are in bad condition:

remove the transparent covers (2) with their packings (1)
make sure that the circuit breakers are closed
install the transparent covers (2) with their packings (1).
TORQUE the transparent covers (2) to between 0.08 and 0.05 m.daN (7.08 and 4.42 lbf.in )

4. Procedure
Subtask 32-45-00-710-050-A ** ON A/C NOT FOR ALL

A. Operational Test of the Parking Brake

NOTE: The pressure value supplied to the brakes, when the parking brake is applied, is between 112.82 bar (1636 psi) to 118.43 bar (1718 psi).

NOTE: A minimum of two persons are necessary to do this test (one person to operate the brakes, the other to look at the brake pistons and Nose Wheel Steering (N/WS) deactivation electric-box 5GC).

ACTION	RESULT
1.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
2.On panel 121VU: A.Open circuit breaker 71GG. B.To make sure that the two electric motors of the parking-brake electrical control-valve operate correctly, do the test in two steps: First with circuit breaker 70GG closed and 71GG open Then with circuit breaker 71GG closed and 70GG open.
3.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position.	On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds. On the nose landing-gear leg, on the N/WS deactivation electric-box 5GC: The PARKING BRAKE indicator light is on. NOTE: The memo and the indicator light come on at the same time. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the operating or extended position.
4.On panel 110VU: Put PARKING BRK control-switch 73GG in the OFF position.	On the upper ECAM DU: The PARK BRK memo is not shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right brake pressures show zero in less than six seconds. On the nose landing-gear leg, on N/WS deactivation electric-box 5GC: The PARKING BRAKE indicator light is off. NOTE: The memo and the indicator light go off at the same time. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the released position.
5.On panel 121VU:
Close circuit breaker 71GG and open circuit breaker 70GG.
6.Pressurize the Yellow hydraulic system with the electric pump (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple pressure indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (3000 psi) (the indicator pointer is in green range).
7.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
8.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position. NOTE: The PARKING BRAKE indicator light does not show during this part of the test.	On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the operating or extended position.
9.On panel 110VU: Put PARKING BRK control-switch 73GG in the OFF position.	On the upper ECAM DU: The PARK BRK memo is not shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right brake pressures show zero in less than six seconds. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the released position.
10.On panel 121VU: Close circuit breaker 70GG.
11.Pressurize the Yellow hydraulic system with the electric pump (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple pressure indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (3000 psi) (the indicator pointer is in the green range).
12.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
13.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position.	On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds.
14.Do the BITE test of the BSCU - Ground Scanning (Ref. AMM TASK 32-46-00-740-002).	Make sure that the below message is not shown: 32.45.53 PARK BRAKE SELECTOR VALVE (102GG)/BSCU (10GG).
15.Push the line key adjacent to RETURN indication until the MCDU main menu comes into view.

Subtask 32-45-00-710-050-B ** ON A/C NOT FOR ALL

A. Operational Test of the Parking Brake

NOTE: The pressure value supplied to the brakes, when the parking brake is applied, is between 112.82 bar (1636 psi) to 118.43 bar (1718 psi).

NOTE: A minimum of two persons are necessary to do this test (one person to operate the brakes, the other to look at the brake pistons and Nose Wheel Steering (N/WS) deactivation electric-box 5GC).

ACTION	RESULT
1.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
2.On panel 121VU: A.Open circuit breaker 71GG. B.To make sure that the two electric motors of the parking-brake electrical control-valve operate correctly, do the test in two steps: First with circuit breaker 70GG closed and 71GG open Then with circuit breaker 71GG closed and 70GG open.
3.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position.	On the EWD: The alert BRAKES PARK BRK LO PR does not show. On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds. On the nose landing-gear leg, on N/WS deactivation electric-box 5GC: The PARKING BRAKE indicator light is on. NOTE: The memo and the indicator light come on at the same time. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the operating or extended position.
4.On panel 110VU: Put PARKING BRK control-switch 73GG in the OFF position.	On the EWD: The alert BRAKES PARK BRK FAULT does not show. On the upper ECAM DU: The PARK BRK memo is not shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right brake pressures show zero in less than six seconds. On the nose landing-gear leg, on the N/WS deactivation electric-box 5GC: The PARKING BRAKE indicator light is off. NOTE: The memo and the indicator light go off at the same time. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the released position.
5.On panel 121VU:
Close circuit breaker 71GG and open circuit breaker 70GG.
6.Pressurize the Yellow hydraulic system with the electric pump (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple pressure indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (3000 psi) (the indicator pointer is in green range).
7.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
8.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position. NOTE: The PARKING BRAKE indicator light does not show during this part of the test.	On the EWD: The alert BRAKES PARK BRK LO PR does not show. On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the operating or extended position.
9.On panel 110VU: Put PARKING BRK control-switch 73GG in the OFF position.	On the EWD: The alert BRAKES PARK BRK FAULT does not show. On the upper ECAM DU: The PARK BRK memo is not shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right brake pressures show zero in less than six seconds. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the released position.
10.On panel 121VU: Close circuit breaker 70GG.
11.Pressurize the Yellow hydraulic system with the electric pump (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple pressure indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (3000 psi) (the indicator pointer is in the green range).
12.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
13.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position.	On the EWD: The alert BRAKES PARK BRK LO PR does not show. On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds.
14.Do the BITE test of the BSCU - Ground Scanning (Ref. AMM TASK 32-46-00-740-002).	Make sure that the below message is not shown: 32.45.53 PARK BRAKE SELECTOR VALVE (102GG)/BSCU (10GG).
15.Push the line key adjacent to RETURN indication until the MCDU main menu comes into view.

Subtask 32-45-00-710-050-C ** ON A/C NOT FOR ALL

A. Operational Test of the Parking Brake

NOTE: The pressure value supplied to the brakes, when the parking brake is applied, is between 112.82 bar (1636 psi) to 118.43 bar (1718 psi).

NOTE: A minimum of two persons are necessary to do this test (one person to operate the brakes, the other to look at the brake pistons and Nose Wheel Steering (N/WS) deactivation electric-box 5GC).

ACTION	RESULT
1.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
2.On panel 121VU: A.Open circuit breaker 71GG. B.To make sure that the two electric motors of the parking-brake electrical control-valve operate correctly, do the test in two steps: First with circuit breaker 70GG closed and 71GG open Then with circuit breaker 71GG closed and 70GG open.
3.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position.	On the EWD: The alert BRAKES PARK BRK LO PR does not show. The alert BRAKES PARK BRK FAULT does not show. On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds. On the nose landing-gear leg, on N/WS deactivation electric-box 5GC: The PARKING BRAKE indicator light is on. NOTE: The memo and the indicator light come on at the same time. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the operating or extended position.
4.On panel 110VU: Put PARKING BRK control-switch 73GG in the OFF position.	On the EWD: The alert BRAKES PARK BRK FAULT does not show. On the upper ECAM DU: The PARK BRK memo is not shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right brake pressures show zero in less than six seconds. On the nose landing-gear leg, on N/WS deactivation electric-box 5GC: The PARKING BRAKE indicator light is off. NOTE: The memo and the indicator light go off at the same time. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the released position.
5.On panel 121VU:
Close circuit breaker 71GG and open circuit breaker 70GG.
6.Pressurize the Yellow hydraulic system with the electric pump (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple pressure indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (3000 psi) (the indicator pointer is in green range).
7.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
8.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position.	On the EWD: The alert BRAKES PARK BRK LO PR does not show. The alert BRAKES PARK BRK FAULT does not show. On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the operating or extended position.
9.On panel 110VU: Put PARKING BRK control-switch 73GG in the OFF position.	On the EWD: The alert BRAKES PARK BRK FAULT does not show. On the upper ECAM DU: The PARK BRK memo is not shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right brake pressures show zero in less than six seconds. On the left and right MLGs: The brake pistons supplied from the Yellow hydraulic system are in the released position.
10.On panel 121VU: Close circuit breaker 70GG.
11.Pressurize the Yellow hydraulic system with the electric pump (Ref. AMM TASK 29-24-00-863-001).	On panel 400VU, on triple pressure indicator 60GG: Make sure that the pressure of the accumulator increases to 206 bar (3000 psi) (the indicator pointer is in the green range).
12.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
13.On panel 110VU: Put PARKING BRK control-switch 73GG in the ON position.	On the EWD: The alert BRAKES PARK BRK LO PR does not show. The alert BRAKES PARK BRK FAULT does not show. On the upper ECAM DU: The PARK BRK memo is shown. NOTE: On panel 400VU, on triple pressure indicator 60GG: The left and right hydraulic pressures show a minimum pressure between 112.82 bar (1636 psi) to 118.43 bar (1718 psi) in less than three seconds.
14.Do the BITE test of the BSCU - Ground Scanning (Ref. AMM TASK 32-46-00-740-002).	Make sure that the below message is not shown: 32.45.53 PARK BRAKE SELECTOR VALVE (102GG)/BSCU (10GG).
15.Push the line key adjacent to RETURN indication until the MCDU main menu comes into view.

Subtask 32-45-00-860-050-A

B. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

5. Close-up
Subtask 32-45-00-942-051-A

A. Removal of Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

Subtask 32-45-00-410-050-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 04:27:25 UTC