Operational Check of the Safety Valve that uses the GND PWR Contactor Override Box

TASK 32-31-00-710-013-A-02
Operational Check of the Safety Valve that uses the GND PWR Contactor Override Box

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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.

ZONE: 190
ZONE: 210
ZONE: 734
ZONE: 744
FIN: 49GA

1. Reason for the Job
Operational check of the safety valve 49GA that uses the GND PWR contactor (3XG) override box, (to make sure that the safety valve opens and closes correctly).

NOTE: This task is an alternative procedure to:

Operational check of the safety valve 49GA that uses the APU to energize the aircraft electrical circuits, (to make sure that the safety valve opens and closes correctly) (Ref. TASK 32-31-00-710-013-A)
or
Operational check of the safety valve 49GA that uses the aircraft batteries, (to make sure that the safety valve opens and closes correctly) (Ref. TASK 32-31-00-710-013-A01).

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	TIE WRAP(S)
No specific	1	WARNING NOTICE(S)
98D24408392000	1	BOX-CONTACTOR,GND PWR
98D27803500001	1	LOCKING TOOL ZERO POS
98D27803500002	1	LOCKING TOOL ZERO POS
98D29208246000	1	SAFETY DEVICE-RAT
98D29208246001	1	DEVICE-SAFETY,RAT
98F32304000000	2	TARGET-FALSE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
734	MAIN DOOR
744	MAIN DOOR
121AL, 195BB, 196BB

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 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 29-22-00-860-007-A	Installation of the Safety Device of the Ram Air Turbine
TASK 29-22-00-860-008-A	Removal of the Safety Device of the Ram Air Turbine
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 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-00-00-860-002-A	Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01	Ground Configuration after Flight Configuration without Electrical Power
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 53-35-13-000-002-A	Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A	Installation of the Quick-Release Access Panels on the Belly Fairing Structure
Contactor 3XG - location and Detail

3. Job Set-up
Subtask 32-31-00-941-099-B

A. Safety Precautions

WARNING: MAKE SURE THAT THE EXTERNAL POWER CONNECTOR IS NOT CONNECTED.

(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) Make sure that the landing gear doors are closed (Ref. AMM TASK 32-12-00-410-001) and (Ref. AMM TASK 32-22-00-410-001).
(4) Install the 98D29208246001 DEVICE-SAFETY,RAT or the 98D29208246000 SAFETY DEVICE-RAT (Ref. AMM TASK 29-22-00-860-007).
(5) Make sure that the flaps are fully retracted (Ref. AMM TASK 27-50-00-866-009).
(6) Make sure that the slats are fully retracted (Ref. AMM TASK 27-80-00-866-005).
(7) Install the 98D27803500001 LOCKING TOOL ZERO POS or the 98D27803500002 LOCKING TOOL ZERO POS on the flap/slat control lever.
(8) Put a WARNING NOTICE(S) on access door 121AL to tell persons not to use the external power receptacle.
(9) On panel 400VU:
(a) Make sure that the landing-gear control-lever 6GA is in the DOWN position.
(b) Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
(10) Put the WARNING NOTICE(S) on the flap/slat control lever to tell persons not to operate the flap/slat system.

Subtask 32-31-00-010-089-A

B. Get Access

Contactor 3XG - location and Detail

(1) Remove the access panel (1) from below panel 123VU.
(2) Make sure that the applicable quick-release access panels 195BB and 196BB are open (Ref. AMM TASK 53-35-13-000-002).

Subtask 32-31-00-860-129-A

C. Open circuit breakers:

Subtask 32-31-00-865-129-A

WARNING: OPEN CIRCUIT BREAKER 7XE. THIS WILL PREVENT A POSSIBLE DEPLOYMENT OF THE RAT IF THE MAIN AC BUSBARS 1XP AND 2XP BECOME ISOLATED.

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/CSM/G /EV AUTO/SPLY	7XE	C01

Subtask 32-31-00-865-149-A

E. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

Subtask 32-31-00-869-124-A

F. Flight Configuration Precautions
(1) Do the flight configuration precautions with electrical power (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-31-00-860-130-A

G. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.

(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(2) Disconnect the electrical connector (5) from the contactor 3XG connection (4).
(3) Install the connectors (2) and (3) of the 98D24408392000 BOX-CONTACTOR,GND PWR to the connector (5) and contactor 3XG connection (4).
(4) Set the switch on the GND PWR Contactor Override Box to the OFF position.
(5) Energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002).

4. Procedure
Subtask 32-31-00-720-080-A ** ON A/C NOT FOR ALL

A. Operational Check of the Safety Valve

WARNING: IF THE GROUND DOOR OPERATING-HANDLE MOVES AWAY FROM THE OPEN POSITION BUT THE RELATED DOOR(S) DOES(DO) NOT CLOSE, MOVE THE HANDLE BACK TO THE OPEN POSITION IMMEDIATELY. IF YOU DO NOT KEEP THE HANDLE IN THE OPEN POSITION ALL THE TIME, THE RELATED DOOR(S) CAN CLOSE SUDDENLY AND CAUSE INJURY TO PERSONS.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

(1) Do the troubleshooting procedure related to the maintenance message shown.

NOTE: During this check, the ECAM shows the warning L/G SYS DISAGREE, which you can ignore.

ACTION	RESULT
1.On panel 20VU: Make sure that the ADIRS is set to the OFF position.
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. 2.Use the electric pump of the Yellow Hydraulic system to pressurize the Green Hydraulic system (Ref. AMM TASK 29-24-00-863-001).
3.Use the TIE WRAP(S) to install the 98F32304000000 TARGET-FALSE on: Left MLG extension proximity-sensors 21GA Right MLG extension proximity-sensors 20GA.	Safety valve 49GA is de-energized (valve closed).
4.Move the applicable ground door-operating handle to the OPEN position.	The related MLG door opens.
5.Try to move the applicable ground door-operating handle to the CLOSE position.	The related MLG door will not close. NOTE: The ground door-operating handle can move because of the remaining green hydraulic pressure, but the MLG door will not close. If the ground door-operating handle does move, set handle back to the open position.
6.Remove and discard the TIE WRAP(S).
7.Remove the 98F32304000000 TARGET-FALSE from: Left MLG extension proximity-sensors 21GA Right MLG extension proximity-sensors 20GA.	Safety valve 49GA is energized (valve open).
8.Move the applicable ground door-operating handle to the CLOSE position.	The related MLG door closes.

(2) Do a reset of LGCIU-1 (5GA1) as follows:
(a) Open the circuit breakers that follow:

1GA
52GA.

(b) Wait for a minimum of 15 seconds.
(c) Close the circuit breakers that follow:

1GA
52GA.

(d) Make sure that the ECAM does not show the warning L/G SYS DISAGREE.

Subtask 32-31-00-720-080-B ** ON A/C NOT FOR ALL

A. Operational Check of the Safety Valve

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

(1) Do the troubleshooting procedure related to the maintenance message shown.

NOTE: During this check, the ECAM shows the warning L/G SYS DISAGREE, which you can ignore.

ACTION	RESULT
1.On panel 41VU: Make sure that the ADIRS is set to the OFF position.
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. 2.Use the electric pump of the Yellow Hydraulic system to pressurize the Green Hydraulic system (Ref. AMM TASK 29-24-00-863-001).
3.Use the TIE WRAP(S) to install the 98F32304000000 TARGET-FALSE on: Left MLG extension proximity-sensors 21GA Right MLG extension proximity-sensors 20GA.	Safety valve 49GA is de-energized (valve closed).
4.Move the applicable ground door-operating handle to the OPEN position.	The related MLG door opens.
5.Try to move the applicable ground door-operating handle to the CLOSE position.	The related MLG door will not close. NOTE: The ground door-operating handle can move because of the remaining green hydraulic pressure, but the MLG door will not close. If the ground door-operating handle does move, set handle back to the open position.
6.Remove and discard the TIE WRAP(S).
7.Remove the 98F32304000000 TARGET-FALSE from: Left MLG extension proximity-sensors 21GA Right MLG extension proximity-sensors 20GA.	Safety valve 49GA is energized (valve open).
8.Move the applicable ground door-operating handle to the CLOSE position.	The related MLG door closes.

(2) Do a reset of LGCIU-1 (5GA1) as follows:
(a) Open the circuit breakers that follow:

1GA
52GA.

(b) Wait for a minimum of 15 seconds.
(c) Close the circuit breakers that follow:

1GA
52GA.

(d) Make sure that the ECAM does not show the warning L/G SYS DISAGREE.

5. Close-up
Subtask 32-31-00-860-131-A

A. Aircraft Maintenance Configuration
(1) Stop the electric pump of the Yellow Hydraulic system (Ref. AMM TASK 29-24-00-864-001).
(2) Depressurize the Green and Yellow hydraulic systems.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 32-31-00-080-068-A

B. Removal of the Test Equipment

WARNING: MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.

(1) Disconnect the connectors (2) and (3) of the GND PWR Contactor Override Box from the connector (5) and the contactor 3XG connection (4).
(2) Connect the electrical connector (5) to the contactor 3XG connection (4).

Subtask 32-31-00-410-082-B

C. Close Access
(1) Make sure that the applicable MLG ground door-operating handle is locked in the CLOSED position.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install the access panel (1) below panel 123VU.
(4) Remove the 98D29208246001 DEVICE-SAFETY,RAT or the 98D29208246000 SAFETY DEVICE-RAT (Ref. AMM TASK 29-22-00-860-008).
(5) Close the applicable quick-release access panels 195BB and 196BB (Ref. AMM TASK 53-35-13-400-002).

Subtask 32-31-00-865-130-A

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/CSM/G /EV AUTO/SPLY	7XE	C01

Subtask 32-31-00-869-125-A

E. Flight Configuration Precautions
(1) Put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-31-00-942-102-A

F. Removal of Equipment
(1) Remove the 98D27803500001 LOCKING TOOL ZERO POS or the 98D27803500002 LOCKING TOOL ZERO POS from the flap/slat control lever.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:43:58 UTC