Functional Check of Hydraulic Fire Shut-Off Valves

TASK 29-10-00-720-001-A
Functional Check of Hydraulic Fire Shut-Off Valves

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 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: 210
FIN: 1046GK ** ON A/C NOT FOR ALL
FIN: 3046GD ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 291000-10
FUNCTIONAL CHECK OF HYDRAULIC FIRE SHUT OFF VALVES
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	AMMETER - DIGITAL
No specific	1	DRIVE 3/8 IN - SQUARE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
FOR [1046GK] (FIRE-S.-O.V.)
437AL, 438AR
FOR [3046GD] (FIRE-S.-O.V.)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
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 29-11-52-000-001-A	Removal of the Engine Pump Fire-Valve
TASK 29-11-52-400-001-A	Installation of the Engine Pump Fire-Valve
TASK 29-13-52-000-001-A	Removal of the Engine Pump Fire-Valve
TASK 29-13-52-400-001-A	Installation of the Engine Pump Fire-Valve
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 71-00-00-710-001-A	Dry Motoring Check
TASK 71-00-00-710-001-B	Dry Motoring Check
TASK 71-00-00-710-045-A	Test No.1 : Dry Motor Leak Check
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)

3. Job Set-up
Subtask 29-10-00-860-073-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) On the ECAM control panel, push the HYD key. Make sure that the HYD page comes into view on the lower ECAM Display Unit (DU)
(4) Make sure that none of these conditions are shown on the ECAM:
(a) for a test of the fire shut-off valve (1046GK) of the Green hydraulic system;

Low air pressure in the Green reservoir.
Low fluid level in the Green reservoir.

(b) for a test of the fire shut-off valve (3046GD) of the Yellow hydraulic system:

Low air pressure in the Yellow reservoir.
Low fluid level in the Yellow reservoir.

(5) If necessary, pressurize the reservoir(s) (Ref. AMM TASK 29-14-00-614-002).
(6) If necessary, add fluid to the reservoir(s) (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(7) On panel 402VU on the center instrument panel, set the A/SKID NOSE WHEEL switch to OFF.

Subtask 29-10-00-865-062-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYD/FIRE VALVE/Y/ENG2	3702GD	C14
49VU	HYD/FIRE VALVE/G/ENG1	1703GK	C13
121VU	HYDRAULIC/SOL VALVES/G/Y/PTU	1801GL	N34
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34

Subtask 29-10-00-860-074-A ** ON A/C NOT FOR ALL

C. Preparation for the Test
(1) On the overhead panel 40VU, push the PTU/AUTO pushbutton switch (P/BSW). Make sure that the OFF light comes on.
(2) Make sure that the Yellow electric pump is not running (ON legend on the YELLOW ELEC PUMP P/BSW is not on).
(3) On panel 40VU, make sure that the GREEN/ENG 1 PUMP and YELLOW/ENG 2 PUMP P/BSW are set to on (the OFF and FAULT lights are out).
(4) On the overhead panel 23VU make sure that these P/BSW are set to on (the OFF and FAULT lights are out):

FLT CTL/SEC 1
FLT CTL/ELAC 1

(5) On the overhead panel 24VU make sure that these P/BSW are set to on (the OFF and FAULT lights are out):

FLT CTL/SEC 2
FLT CTL/SEC 3
FLT CTL/ELAC 2

Subtask 29-10-00-860-074-B ** ON A/C NOT FOR ALL

FLT CTL/SEC 1
FLT CTL/ELAC 1

(5) On the overhead panel 24VU make sure that these P/BSW are set to on (the OFF and FAULT lights are out):

FLT CTL/SEC 2
FLT CTL/SEC 3
FLT CTL/ELAC 2

(6) Open the fan cowl door (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1046GK] (FIRE-S.-O.V.)
437AL and 438AR.
(b) FOR [3046GD] (FIRE-S.-O.V.)
447AL and 448AR.

4. Procedure
Subtask 29-10-00-720-051-A ** ON A/C NOT FOR ALL

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.

CAUTION: MAKE SURE YOU DO NOT CAUSE AN ACCIDENTAL DISCHARGE OF THE ENGINE FIRE EXTINGUISHERS. THE ENGINE FIRE EXTINGUISHERS ARE ARMED DURING THE TEST.

CAUTION: DO NOT START OR DRY MOTOR THE ENGINES WITH A HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE ENGINE PUMPS.

A. Do this test

NOTE: This procedure as written is for the valve 1046GK, differences in the procedure for the valve 3046GD are shown in brackets.

NOTE: On the glareshield panels 130VU and 131VU:

Reset the MASTER CAUT lights before you do the subsequent procedure.

ACTION	RESULT
1.Dry motor the left (right) engine (Ref. AMM TASK 71-00-00-710-001).	The left (right) engine turns and causes the engine pump of the Green (Yellow) hydraulic system to turn. The ECAM lower display unit (DU) shows the pressure in the Green (Yellow) hydraulic system is 3000 psi approximately.
2.Operate the sidestick and rudder pedals so that the control surfaces move continuously.
3.On the ECAM Lower DU:
Monitor and make a note of the Green (Yellow) hydraulic fluid level.
4.On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:	On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:
Lift the guard and push and release the ENG 1 FIRE (ENG 2 FIRE) P/BSW.	The SQUIB lights of the ENG 1 FIRE/AGENT 1 and ENG 1 FIRE/AGENT 2 (ENG 2 FIRE/AGENT 1 and ENG 2 FIRE/AGENT 2) come on.
Continue to operate the side stick and the rudder pedals. NOTE: The noise that you can hear comes from the engine driven pump and is normal	On the ECAM lower DU:
	The fire valve symbol of the GREEN (YELLOW) hydraulic system changes from in-line and green-colored to 90 degrees out-of-line and amber-colored.
	The index of the Green (Yellow) hydraulic fluid level moves up.
	The pressure in the Green (Yellow) hydraulic system decreases to less than 700 psi in not more than 60 s from operation of the P/BSW.
	The single chime audio warning operates.
	On the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
5.Stop the operation of the sidestick and rudder pedals.
6.On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:	On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:
Push the ENG 1 FIRE (ENG 2 FIRE) P/BSW.
Make sure that the P/BSW guard goes back to its initial position.	The SQUIB lights of the ENG 1 FIRE/AGENT 1 and ENG 1 FIRE/AGENT 2 (ENG 2 FIRE/AGENT 1 and ENG 2 FIRE/AGENT 2) go off.
	On the ECAM lower DU: The fire valve symbol of the GREEN (YELLOW) hydraulic system changes from 90 degrees out-of-line and amber-colored to in-line and green-colored.
	The pressure in the Green (Yellow) hydraulic system increases.
	The index of the Green (Yellow) hydraulic fluid level goes back to its initial position.
	On the glareshield panels 130VU and 131VU: The MASTER CAUT lights go off. NOTE: It is possible that you must reset the MASTER CAUT lights, if messages other than ENGINE NO. 1(2) shut down, be displayed on the ECAM.
7.Stop the dry motoring of the left (right) engine (Ref. AMM TASK 71-00-00-710-001).
WARNING: BE VERY CAREFUL WHEN YOU DO WORK ON CIRCUIT BREAKER PANELS. THERE IS A HIGH VOLTAGE BEHIND THESE PANELS. 8.Open the overhead panel 49VU to get access to the pins of the circuit breaker 1703GK (3702GD).
9.Connect a AMMETER - DIGITAL (with a range of less than 500mA) between the terminal 1 and terminal 2 of the circuit breaker 1703GK (3702GD) with alligator clips. NOTE: Make sure that the AMMETER - DIGITAL is correctly calibrated.
10.Open the circuit breaker 1703GK (3702GD).
11.Make sure that the AMMETER - DIGITAL shows 0 mA. NOTE: Take into account the tolerance of the AMMETER - DIGITAL. NOTE: If the AMMETER - DIGITAL does not show 0 mA, replace the fire shut-off valve 1046GK (3046GD) (Ref. AMM TASK 29-11-52-000-001) and (Ref. AMM TASK 29-11-52-400-001) or ( (Ref. AMM TASK 29-13-52-000-001)) and ( (Ref. AMM TASK 29-13-52-400-001)). NOTE: With a permanent operation of the electrical motor of the fire shut-off valve, because of an incomplete opening of the valve, the current range can be from 25 mA (clutch worn) to 400 mA.
12.Disconnect the AMMETER - DIGITAL.
13.Close the circuit breaker 1703GK (3702GD).
14.Install the overhead panel 49VU.

Subtask 29-10-00-720-051-C ** ON A/C NOT FOR ALL

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.

CAUTION: MAKE SURE YOU DO NOT CAUSE AN ACCIDENTAL DISCHARGE OF THE ENGINE FIRE EXTINGUISHERS. THE ENGINE FIRE EXTINGUISHERS ARE ARMED DURING THE TEST.

CAUTION: DO NOT START OR DRY MOTOR THE ENGINES WITH A HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE ENGINE PUMPS.

A. Do this test

NOTE: This procedure as written is for the valve 1046GK, differences in the procedure for the valve 3046GD are shown in brackets.

NOTE: On the glareshield panels 130VU and 131VU:

Reset the MASTER CAUT lights before you do the subsequent procedure.

ACTION	RESULT
1.Dry motor the left (right) engine (Ref. AMM TASK 71-00-00-710-045).	The left (right) engine turns and causes the engine pump of the Green (Yellow) hydraulic system to turn. The ECAM lower display unit (DU) shows the pressure in the Green (Yellow) hydraulic system is 3000 psi approximately.
2.Operate the sidestick and rudder pedals so that the control surfaces move continuously.
3.On the ECAM Lower DU:
Monitor and make a note of the Green (Yellow) hydraulic fluid level.
WARNING: BE CAREFUL WHEN YOU HOLD THE PNEUMATIC STARTER VALVE IN THE OPEN POSITION. THE VALVE WILL AUTOMATICALLY TRY TO CLOSE WITH A SUDDEN FORCE WHEN THE ENG 1(2) FIRE PUSHBUTTON SWITCH IS PUSHED. THIS FORCE CAN CAUSE INJURY TO YOUR HANDS OR FINGERS. 4.At the Engine 1 (Engine 2): Use a DRIVE 3/8 IN - SQUARE to hold the Pneumatic Starter Valve (4005KS) in the open position until you did complete step 7 of the test.
5.On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:	On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:
Lift the guard and push and release the ENG 1 FIRE (ENG 2 FIRE) P/BSW.	The SQUIB lights of the ENG 1 FIRE/AGENT 1 and ENG 1 FIRE/AGENT 2 (ENG 2 FIRE/AGENT 1 and ENG 2 FIRE/AGENT 2) come on.
Continue to operate the side stick and the rudder pedals NOTE: The noise that you can hear comes from the engine driven pump and is normal.	On the ECAM lower DU:
	The fire valve symbol of the GREEN (YELLOW) hydraulic system changes from in-line and green-colored to 90 degrees out-of-line and amber-colored.
	The index of the Green (Yellow) hydraulic fluid level moves up.
	The pressure in the Green (Yellow) hydraulic system decreases to less than 700 psi in not more than 60 s from operation of the P/BSW.
	The single chime audio warning operates.
	On the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
6.Stop the operation of the sidestick and rudder pedals.
7.On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:	On the ENG/APU FIRE panel 1WD of the overhead panel 20VU:
Push the ENG 1 FIRE (ENG 2 FIRE) P/BSW.
Make sure that the P/BSW guard goes back to its initial position.	The SQUIB lights of the ENG 1 FIRE/AGENT 1 and ENG 1 FIRE/AGENT 2 (ENG 2 FIRE/AGENT 1 and ENG 2 FIRE/AGENT 2) go off.
	On the ECAM lower DU: The fire valve symbol of the GREEN (YELLOW) hydraulic system changes from 90 degrees out-of-line and amber-colored to in-line and green-colored.
	The pressure in the Green (Yellow) hydraulic system increases.
	The index of the Green (Yellow) hydraulic fluid level goes back to its initial position.
	On the glareshield panels 130VU and 131VU: The MASTER CAUT lights go off. NOTE: It is possible that you must reset the MASTER CAUT lights, if messages other than ENGINE NO. 1(2) shut down, be displayed on the ECAM.
8.Remove the DRIVE 3/8 IN - SQUARE from the pneumatic starter valve (4005KS).
9.Stop the dry motoring of the left (right) engine (Ref. AMM TASK 71-00-00-710-045).
WARNING: BE VERY CAREFUL WHEN YOU DO WORK ON CIRCUIT BREAKER PANELS. THERE IS A HIGH VOLTAGE BEHIND THESE PANELS. 10.Open the overhead panel 49VU to get access to the pins of the circuit breaker 1703GK (3702GD).
11.Connect a AMMETER - DIGITAL (with a range of less than 500mA) between the terminal 1 and terminal 2 of the circuit breaker 1703GK (3702GD) with alligator clips. NOTE: Make sure that the AMMETER - DIGITAL is correctly calibrated.
12.Open the circuit breaker 1703GK (3702GD).
13.Make sure that the AMMETER - DIGITAL shows 0 mA. NOTE: Take into account the tolerance of the AMMETER - DIGITAL. NOTE: If the AMMETER - DIGITAL does not show 0 mA, replace the fire shut-off valve 1046GK (3046GD) (Ref. AMM TASK 29-11-52-000-001) and (Ref. AMM TASK 29-11-52-400-001) or ( (Ref. AMM TASK 29-13-52-000-001)) and ( (Ref. AMM TASK 29-13-52-400-001)). NOTE: With a permanent operation of the electrical motor of the fire shut-off valve, because of an incomplete opening of the valve, the current range can be from 25 mA (clutch worn) to 400 mA.
14.Disconnect the AMMETER - DIGITAL.
15.Close the circuit breaker 1703GK (3702GD).
16.Install the overhead panel 49VU.

5. Close-up
Subtask 29-10-00-860-075-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to the serviceable condition.
(1) On panel 402VU on the center pedestal, set the A/SKID NOSE WHEEL switch to on.
(2) On the overhead panel 40VU, push and release the PTU/AUTO P/BSW. Make sure that the OFF and FAULT lights are not on.
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002)
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 29-10-00-860-075-B ** ON A/C NOT FOR ALL

A. Put the aircraft back to the serviceable condition.
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1046GK] (FIRE-S.-O.V.)
437AL and 438AR.
(b) FOR [3046GD] (FIRE-S.-O.V.)
447AL and 448AR.
(2) On panel 402VU on the center pedestal, set the A/SKID NOSE WHEEL switch to on.
(3) On the overhead panel 40VU, push and release the PTU/AUTO P/BSW. Make sure that the OFF and FAULT lights are not on.
(4) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002)
(5) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 08:00:50 UTC