Operational Check to Ensure Safety Valve Closes at 260 Knots

TASK 32-31-00-710-005-A-02
Operational Check to Ensure Safety Valve Closes at 260 Knots

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.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE TRIMMABLE HORIZONTAL STABILIZER (THS) ARE CLEAR BEFORE YOU DO THIS PROCEDURE. IF YOU DO NOT OBEY THIS INSTRUCTION, THE MOVEMENT OF THE THS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

ZONE: 190
ZONE: 210
ZONE: 734
ZONE: 744

1. Reason for the Job
Refer to the MPD TASK: 323100-04
OPERATIONAL CHECK TO ENSURE SAFETY VALVE CLOSES AT 260 KNOTS
Operational Check to Ensure Safety Valve Closes at 260 knots that uses the GND PWR Contactor (3XG) Override Box, (the Air Data/Inertial Reference System (ADIRS) is used to operate the valve OPEN/CLOSE).

NOTE: This task is an alternative procedure to the:

Operational check to ensure safety valve closes at 260 knots that uses the APU to energize the electrical circuits, (the Air Data/Inertial Reference System (ADIRS) is used to operate the valve OPEN/CLOSE) (Ref. TASK 32-31-00-710-005-A)
or
Operational check to ensure safety valve closes at 260 knots that uses the aircraft batteries and electrical ground power, (the Air Data/Inertial Reference System (ADIRS) is used to operate the valve OPEN/CLOSE) (Ref. TASK 32-31-00-710-005-A-01).

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

REFERENCE	QTY	DESIGNATION
No specific	AR	GENERATOR - GROUND PRESSURE MINI. 100 MB
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	TAPE - ADHESIVE
No specific	AR	TIE WRAP(S)
No specific	1	WARNING NOTICE(S)
36122	1	ADAPTOR-CHARGING,PITOT PROBE
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
98D34003500000	1	ADAPTER COVER-STATIC PORT
98F32304000000	2	TARGET-FALSE
98F34103001000	1	ADAPTER-PITOT PROBE
P75701-4C	1	ADAPTER-PITOT PROBE

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 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
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
Probes and Sensors - Location and Detail

3. Job Set-up
Subtask 32-31-00-941-087-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 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 32-31-00-010-078-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 32-31-00-865-107-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.

C. 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 32-31-00-865-146-A

D. 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 32-31-00-869-111-A

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

Subtask 32-31-00-480-066-A

F. Installation of the Test Equipment

Probes and Sensors - Location and Detail

CAUTION: REMOVE THE PROTECTIVE COVERS FROM THE PROBES BEFORE YOU DO THE TEST.

CAUTION: WHEN YOU SEAL THE DRAIN HOLE IN THE PITOT PROBE, DO NOT SEAL THE HOLE DIRECTLY WITH THE COLORED ADHESIVE TAPE. ALWAYS PUT A PIECE OF PLASTIC ON THE HOLE FIRST AND USE THE COLORED ADHESIVE TAPE TO ATTACH THE PLASTIC. IF YOU SEAL THE DRAIN HOLE DIRECTLY WITH THE ADHESIVE TAPE, THERE IS A RISK THAT SOME OF THE ADHESIVE WILL STAY ON THE HOLE AND COLLECT PARTICLES. THIS CAN SUBSEQUENTLY CAUSE BLOCKAGE OF THE HOLE AND THUS INCORRECT OPERATION OF THE PROBE.

(1) Remove the slip-on covers from the pitot and static probes.
(2) Connect the GENERATOR - GROUND PRESSURE MINI. 100 MB to the static and pitot probes as follows:
(a) Use the 98D34003500000 ADAPTER COVER-STATIC PORT equipment to connect the GROUND PRESSURE GENERATOR to the static probes 7DA1 and 8DA1.
(b) Use the 36122 ADAPTOR-CHARGING,PITOT PROBE or the 98F34103001000 ADAPTER-PITOT PROBE for Thales probes or the P75701-4C ADAPTER-PITOT PROBE for Rosemount (Aerospace)/Goodrich probes to connect the GROUND PRESSURE GENERATOR to the pitot probe 9DA1.
(c) Seal the drain holes of the pitot probe 9DA1 with TAPE - ADHESIVE.

Subtask 32-31-00-860-100-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) Disconnect the electrical connector (5) from the contactor 3XG connection (4).
(2) Install the connectors (2) and (3) of the 98D24408392000 BOX-CONTACTOR,GND PWR GND PWR Contactor Override Box to the connector (5) and contactor 3XG connection (4).
(3) Put the switch on the GND PWR Contactor Override Box to the OFF position.
(4) Energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002).

4. Procedure
Subtask 32-31-00-720-071-A

A. Operational Check to Ensure Safety Valve Closes at 260 Knots

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.

CAUTION: TO PREVENT DAMAGE TO INSTRUMENTS, OBEY THESE PRECAUTIONS WHEN YOU DO THE TEST:

THE PRESSURES SET MUST NOT BE MORE THAN 1050 hPa (31 in Hg) OR LESS THAN 115 hPa (3.39 in Hg)
CHANGES IN STATIC AND TOTAL PRESSURES MUST NOT BE MORE THAN 6000 FEET/MINUTE
DO NOT SUDDENLY OPEN LINES TO AMBIENT AIR WHILE THE PRESSURE GENERATOR IS CONNECTED.

CAUTION: THE TOTAL PRESSURE IN THE PITOT SYSTEM MUST NEVER BE LESS THAN THE STATIC PRESSURE. THE DIFFERENCE BETWEEN THE PITOT AND THE STATIC PRESSURE CIRCUITS MUST NEVER BE MORE THAN 368 hPa (10.86 in Hg).

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

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.Make sure that the travel range of the applicable MLG door is clear.
4.Move the applicable ground door-operating handle to the OPEN position.	The related MLG door opens.
5.Use the TIE WRAP(S) to install the 98F32304000000 TARGET-FALSE on: The left MLG extension-proximity-sensor (21GA) The right MLG extension-proximity-sensor (20GA).	Safety valve 49GA is de-energized (valve closed).
6.Try to move the applicable ground door-operating handle to the CLOSE position.	The related door will not close. NOTE: The ground door-operating handle can move because of the remaining hydraulic pressure, but the MLG door will not close. If the ground door-operating handle moves, set it back to the OPEN position.
7.On panel 20VU: Set the IR 1 selector switch to ATT.	Air Data/Inertial Reference Unit (ADIRU) 1 energizes.
8.Set the GENERATOR - GROUND PRESSURE MINI. 100 MB to give a signal of between 268 and 270 knots.	In the cockpit, on the PFD, airspeed value is between 268 and 270 knots.
9.Make sure that the travel range of the applicable MLG door is clear.
10.Try to move the applicable ground door-operating handle to the CLOSE position.	The related door will not close. NOTE: The ground door-operating handle can move because of the remaining hydraulic pressure, but the MLG door will not close. If the ground door-operating handle moves, set it back to the OPEN position.
11.Slowly decrease the signal from the GENERATOR - GROUND PRESSURE MINI. 100 MB to between 254 and 256 knots.	Safety valve 49GA energizes (valve open). In the cockpit, on the PFD, airspeed value is between 254 and 256 knots.
12.Make sure that the travel range of the applicable MLG door is clear.
13.Move the applicable ground door-operating handle to the CLOSE position.	The related MLG door closes.
14.Set the GENERATOR - GROUND PRESSURE MINI. 100 MB to OFF.
15.On panel 20VU: Set the IR 1 selector switch to OFF.

(2) Stop the electric pump of the Yellow hydraulic system to depressurize the Green hydraulic system (Ref. AMM TASK 29-24-00-864-001).

Subtask 32-31-00-080-067-A

B. Removal of the Test Equipment
(1) Disconnect and remove the 98D34003500000 ADAPTER COVER-STATIC PORT equipment from the static probes 7DA1 and 8DA1.
(2) Disconnect and remove the 36122 ADAPTOR-CHARGING,PITOT PROBE or the 98F34103001000 ADAPTER-PITOT PROBE or the P75701-4C ADAPTER-PITOT PROBE from the pitot probe 9DA1.
(3) Remove the colored adhesive tape from the pitot probe 9DA1 drain holes.

Subtask 32-31-00-480-067-A

C. Installation of the Test Equipment

(1) Connect the GROUND PRESSURE GENERATOR to the static and pitot probes as follows:
(a) Connect the 98D34003500000 ADAPTER COVER-STATIC PORT equipment to the static probes 7DA3 and 8DA3.
(b) Use the 36122 ADAPTOR-CHARGING,PITOT PROBE or the 98F34103001000 ADAPTER-PITOT PROBE for Thales probes or the P75701-4C ADAPTER-PITOT PROBE for Rosemount (Aerospace)/Goodrich probes to connect the GROUND PRESSURE GENERATOR to the pitot probe 9DA3.
(c) Seal the drain holes of the pitot probe 9DA3 with TAPE - ADHESIVE.

Subtask 32-31-00-720-072-A

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

CAUTION: TO PREVENT DAMAGE TO INSTRUMENTS, OBEY THESE PRECAUTIONS WHEN YOU DO THE TEST:

THE PRESSURES SET MUST NOT BE MORE THAN 1050 hPa (31 in Hg) OR LESS THAN 115 hPa (3.39 in Hg)
CHANGES IN STATIC AND TOTAL PRESSURES MUST NOT BE MORE THAN 6000 FEET/MINUTE
DO NOT SUDDENLY OPEN LINES TO AMBIENT AIR WHILE THE PRESSURE GENERATOR IS CONNECTED.

D. Operational Check to Ensure Safety Valve Closes at 260 Knots

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

ACTION	RESULT
1.Move the applicable ground door-operating handle to the OPEN position.	The related MLG door opens.
2.On panel 20VU: Set the IR 3 selector switch to ATT to energize ADIRU 3. Do test procedure steps (4) thru (8) of Para. 4.A.
3.On panel 20VU: Set the IR 3 selector switch to OFF.
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. 4.Use the electric pump of the Yellow hydraulic system to pressurize the Green hydraulic system (Ref. AMM TASK 29-24-00-863-001).
5.Make sure that the travel range of the applicable MLG door is clear.
6.Move the applicable ground door-operating handle to the OPEN position.	The related MLG door opens.
7.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 hydraulic pressure, but the MLG door will not close. If the ground door-operating handle moves, set it back to the OPEN position.
8.Remove and discard the TIE WRAP(S).
9.Remove the 98F32304000000 TARGET-FALSE from: The left MLG extension-proximity-sensor (21GA) The right MLG extension-proximity-sensor (20GA).	Safety valve 49GA is energized (valve open).
10.Make sure that the travel range of the applicable MLG door is clear.
11.Move the applicable ground door-operating handle to the CLOSE position.	The related MLG door closes.

(1) 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 32-31-00-860-101-A

A. Aircraft Maintenance Configuration
(1) Stop the electric pump of the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
(2) Make sure that the Yellow and the Green hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-001).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 32-31-00-080-064-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).
(3) Disconnect and remove the 98D34003500000 ADAPTER COVER-STATIC PORT equipment from the static probes 7DA3 and 8DA3 and the GROUND PRESSURE GENERATOR.
(4) Disconnect and remove the 36122 ADAPTOR-CHARGING,PITOT PROBE or the 98F34103001000 ADAPTER-PITOT PROBE or the P75701-4C ADAPTER-PITOT PROBE from the pitot probe 9DA3 and the GROUND PRESSURE GENERATOR.
(5) Remove the colored adhesive tape from the pitot probe 9DA3 drain holes.

Subtask 32-31-00-410-072-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 32-31-00-865-108-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 32-31-00-869-112-A

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

Subtask 32-31-00-942-091-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 00:43:55 UTC