Failure of the Park Brake Selector Valve 102GG (closed position)

TASK 32-45-00-810-809-A
Failure of the Park Brake Selector Valve 102GG (closed position)

1. Possible Causes

CTL VALVE-PARK BRK, ELEC [102GG]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 29-24-00-863-001	Pressurize the Yellow Hydraulic System with the Electric Pump
AMM 31-60-00-860-001	EIS Start Procedure
AMM 32-45-53-000-001	Removal of the Parking-Brake Electrical Control-Valve
AMM 32-45-53-400-001	Installation of the Parking-Brake Electrical Control-Valve
AMM 32-46-00-740-002	BITE Test of the BSCU - Ground Scanning

3. Fault Confirmation

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. MOVEMENT OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

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.

Subtask 32-45-00-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(2) On the panel 400VU, make sure that the Landing Gear control lever is at DOWN.
(3) On the panel 402VU, make sure that the A/SKID & N/W STRG switch is at ON.
(4) On the panel 110VU, make sure that the PARK BRK control switch is at OFF.
(5) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
(6) Make sure that the Green hydraulic system is depressurized:

On the overhead panel 40VU, set the PTU pushbutton switch in the OFF position and make sure that the OFF legend comes on.

(7) Do a reset of the BSCU (10GG):

Set the A/SKID & N/W STRG switch to OFF then ON.

(8) Pressurize the Yellow hydraulic system
AMM 29-24-00-863-001.
(9) On the panel 110VU, put the PARKING BRK control-switch in the ON then OFF position.

Subtask 32-45-00-710-059-A ** ON A/C NOT FOR ALL

B. Tests

NOTE: If the fault message PARK BRAKE SELECTOR(102GG)/BSCU(10GG) is shown on the Post Flight Report after the brake accumulator (2852GM) was found hydraulically depressurized:

no action is necessary.

(1) After you put the PARKING BRK control switch 73GG in the OFF position, wait 5 second minimum and do the GROUND SCANNING of the BSCU AMM 32-46-00-740-002.

4. Fault Isolation
Subtask 32-45-00-810-058-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message PARK BRAKE SELECTOR(102GG)/BSCU(10GG)

replace the CTL VALVE-PARK BRK, ELEC [102GG] AMM 32-45-53-000-001 AMM 32-45-53-400-001

Subtask 32-45-00-710-060-A ** ON A/C NOT FOR ALL

B. Do the test given in Para.3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:31:45 UTC