Functional Check of Reservoir Low Level Warning

TASK 29-31-00-710-001-A
Functional Check of Reservoir Low Level Warning

WARNING: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 190
ZONE: 195
ZONE: 197
ZONE: 198

1. Reason for the Job
Refer to the MPD TASK: 293100-01
FUNCTIONAL CHECK OF RESERVOIR LOW LEVEL WARNING
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	1	CONTAINER 1 L (1/4 USGAL)
No specific	1	HOSE - HYDRAULIC, LOW PESSURE
No specific	AR	WARNING NOTICE(S)
97A29102035000	1	CONNECTOR-PRESSURIZING,HYDRAULIC TANK
98D29003501000	1	FILL UNIT-AIR PRESSURIZING TOOL, HYDRAULIC RESERVOIR
98D29003501003	1	FILL UNIT - AIR
ALT29000001	1	HYD GRND PWR UNIT3000

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT
195	HYDRAULIC COMPT AND FAIRINGS
197	REAR FAIRING
198	REAR FAIRING
195BB, 196BB, 197CB, 197EB, 197FB, 198CB

D. 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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
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

3. Job Set-up
Subtask 29-31-00-010-052-A

A. Get Access
(1) Open the access doors 196BB 195BB 197CB 197EB 197FB 198CB.
(2) Open the right main door of the main landing gear (Ref. AMM TASK 32-12-00-010-001).

Subtask 29-31-00-860-052-A

B. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(3) Put WARNING NOTICE(S) to tell persons not to pressurize the hydraulic systems:

In the flight compartment on the hydraulic section 40VU of the overhead panel.
On the ground service panels of the Green, Yellow and Blue hydraulic systems.

(4) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(5) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(6) On the ECAM control panel on the center pedestal, push the HYD pushbutton switch. Make sure that the HYD page is shown on the lower (system) display on the ECAM.

Subtask 29-31-00-865-053-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-31-00-860-051-B ** ON A/C NOT FOR ALL

D. Preparation for the Test
(1) Remove the blanking cap from the ground connector for the pressurization of reservoirs on the reservoir pressurization unit 1360GM.
(2) Connect the 98D29003501000 FILL UNIT-AIR PRESSURIZING TOOL, HYDRAULIC RESERVOIR or 98D29003501003 FILL UNIT - AIR to the ground connector on the reservoir pressurization unit 1360GM.

NOTE: If the pressurizing tool is not available, you can use an alternative supply of air. The supply must have a pressure of 5 bar (72.5189 psi) and it must have a filter. The filter must have a rating of 5 microns or better.
As alternative to the air source, you can use the nitrogen source with 97A29102035000 CONNECTOR-PRESSURIZING,HYDRAULIC TANK.

(3) A supply approximately 40 l (10.5668 USgal) of Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) is necessary. You can use:

An approved ALT29000001 HYD GRND PWR UNIT3000
The hand pump 1009GM of the reservoir filling system which is part of the aircraft equipment.

(a) To connect the hydraulic ground-service cart to the aircraft:
1 On the ground service panel of the Green hydraulic system, remove the blanking cap from the reservoir fill connection 1007GM.
2 Connect the hose of the hydraulic ground-service cart to the reservoir fill connection.
(b) If no hydraulic ground-service cart is available, connect the hand pump 1009GM as follows:
1 Remove the blanking cap from the reservoir fill valve 1698GM on the hand pump 1009GM.
2 Get the flexible hose 1699GM from its stowage in the ground service panel of the Green hydraulic system.
3 Connect the flexible hose to the reservoir fill valve.
4 Put the other end of the flexible hose in a container of clean hydraulic fluid.
5 Get the hand pump lever 3270GM from its position in the ground service panel of the Yellow hydraulic system.
6 Connect the hand pump lever to the hand pump 1009GM.
7 Extend the hand pump lever.
(4) Connect a HOSE - HYDRAULIC, LOW PESSURE with a 9/16-18 UNJF female adapter to the drain valve of the reservoir of the Green hydraulic system.
(5) Put the free end of the hose into the CONTAINER - HYDRAULIC FLUID RESISTANT.
(6) Look at the quantity indicator of the three reservoirs and write down the quantity of hydraulic fluid in each reservoir.
(7) Set the ground connector on the reservoir pressurization unit 1360GM to OPEN.
(8) Fill the reservoirs with air to a pressure of 50 psig (refer to the gages on the reservoirs to find the air pressure). Keep the supply of air constant until the pressure in the reservoirs is always more than 35 psig (2.5 bar). If the air supply is not constant, the pressure decreases when you drain the fluid from the reservoirs.

Subtask 29-31-00-860-051-C ** ON A/C NOT FOR ALL

(3) A supply approximately 40 l (10.5668 USgal) of Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) is necessary. You can use:

An approved ALT29000001 HYD GRND PWR UNIT3000
The hand pump 1009GM of the reservoir filling system which is part of the aircraft equipment.

NOTE: It is not permitted to use high-density fluid Skydrol 500B-4.

4. Procedure
Subtask 29-31-00-710-050-A

A. Do this test:

ACTION	RESULT
1.On the reservoir of the Green hydraulic system:
Carefully open the drain valve.	The fluid quantity of the reservoir decreases.
Control the flow of fluid and let the content of the reservoir decrease slowly.
2.When the fluid quantity indicator 1834GQ on the Green ground service panel or the quantity indicator of the reservoir shows the fluid quantity between 3.4 l (0.90 USgal) and 2.6 l (0.69 USgal).	On the ECAM lower Display Unit (DU): The fluid quantity indication of the GREEN system shows the low fluid level. The color of the fluid quantity indication changes from green to amber. On the ECAM upper DU: The message HYD-G-RSVR LO LVL and related actions come on. On the overhead panel 40VU: The GREEN/ENG 1/PUMP/FAULT light comes on. The PTU/FAULT light comes on. The single chime audio warning operates. On the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
3.On the reservoir of the Green hydraulic system:
Let the drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
4.On the ground service panel of the Green hydraulic system:	The reservoir of the Green hydraulic system is connected to the reservoir filling system. On the reservoir indicator 1834GQ:
Set the reservoir-filling manual selector-valve 1134GQ to GREEN.	The green indicator light comes on. The indicator shows the fluid quantity of the reservoir of the Green hydraulic system.
5.Use the hydraulic ground-service cart or the hand pump to put fluid into the reservoir of the Green hydraulic system until all the warnings go off.
6.Open the circuit breaker 1832GQ	The usual low-level warning system is inoperative.
7.On the reservoir of the Green hydraulic system:
Carefully open the drain valve.	The fluid quantity of the reservoir decreases.
Control the flow of fluid and let the content of the reservoir decrease slowly.
8.When the fluid quantity indicator 1834GQ on the Green ground service panel or the quantity indicator of the reservoir shows the fluid quantity between 3.5 l (0.92 USgal) and 3.3 l (0.87 USgal): Stop draining the reservoir of the Green hydraulic system.
9.On the reservoir of the Green hydraulic system: Let the drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
10.On the reservoir of the Green hydraulic system: Move the free end of the hose from the CONTAINER - HYDRAULIC FLUID RESISTANT to the CONTAINER 1 L (1/4 USGAL).
11.On the reservoir of the Green hydraulic system: Carefully open the drain valve. Control the flow of fluid and let the content of the reservoir decrease slowly.
12.When the CONTAINER 1 L (1/4 USGAL) is fully filled.	On the ECAM lower DU: The color of the fluid quantity indication changes from green to amber. On the ECAM upper DU: The message HYD-G-RSVR LO LVL and related actions come on. The single chime audio warning operates. On the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
13.On the reservoir of the Green hydraulic system:
Let the drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
14.Use the hydraulic ground-service cart or the hand pump to put fluid into the reservoir of the Green hydraulic system until the warnings on the ECAM displays go off.
15.On the ground service panel of the Green hydraulic system:	On the reservoir indicator 1834GQ:
Set the reservoir-filling manual selector-valve to NEUTRAL.	The green indicator light goes off. The indicator gives no indication of the fluid quantity of the reservoirs.
16.Close the circuit breaker 1832GQ.	The usual low-level warning system is operative.
17.Remove the hose and the adapter from the drain valve of the reservoir of the Green hydraulic system. 18.Remove the CONTAINER 1 L (1/4 USGAL) and CONTAINER - HYDRAULIC FLUID RESISTANT. 19.Connect the hose and the adapter to the drain valve of the reservoir of the Yellow hydraulic system. 20.Put the free end of the hose into the CONTAINER - HYDRAULIC FLUID RESISTANT.
21.On the reservoir of the Yellow hydraulic system:
Carefully open the drain valve.	The fluid quantity of the reservoir decreases.
Control the flow of fluid and let the content of the reservoir decrease slowly.
22.When the the fluid quantity indicator 1834GQ on the Green ground service panel or the quantity indicator of the reservoir shows the fluid quantity between 3.4 l (0.90 USgal) and 2.6 l (0.69 USgal).	On the ECAM lower DU: The fluid quantity indication of the YELLOW system shows the low fluid level. The color of the fluid quantity indication changes from green to amber. On the ECAM upper DU: The message HYD-Y RSVR LO LVL and related actions come on. On the overhead panel 40VU: The YELLOW/ENG 2/PUMP/FAULT light comes on. The PTU/FAULT light comes on. The single chime audio warning operates. On the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
23.On the reservoir of the Yellow hydraulic system:
Let the drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
24.On the ground service panel of the Green hydraulic system:	The reservoir of the Yellow hydraulic system is connected to the reservoir filling system. On the reservoir indicator 1834GQ:
Set the reservoir-filling manual selector-valve 1134GQ to YELLOW.	The yellow indicator light comes on. The indicator shows the fluid quantity of the reservoir of the Yellow hydraulic system.
25.Use the hydraulic ground-service cart or the hand pump to put fluid into the reservoir of the Yellow hydraulic system until all the warnings go off.
26.Open the circuit breaker 1832GQ.	The usual low-level warning system is inoperative.
27.On the reservoir of the Yellow hydraulic system:
Carefully open the drain valve.	The fluid quantity of the reservoir decreases.
Control the flow of fluid and let the content of the reservoir decrease slowly.
28.When the the fluid quantity indicator 1834GQ on the Green ground service panel, or the quantity indicator of the reservoir shows the fluid quantity between 3.5 l (0.92 USgal) and 3.3 l (0.87 USgal): Stop draining the reservoir of the Yellow hydraulic system.
29.On the reservoir of the Yellow hydraulic system: Let the drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
30.On the reservoir of the Yellow hydraulic system: Move the free end of the hose from the CONTAINER - HYDRAULIC FLUID RESISTANT to the CONTAINER 1 L (1/4 USGAL).
31.On the reservoir of the Yellow hydraulic system: Carefully open the drain valve. Control the flow of fluid and let the content of the reservoir decrease slowly.
32.When the CONTAINER 1 L (1/4 USGAL) is fully filled.	On the ECAM lower DU: The color of the fluid quantity indication changes from green to amber. On the ECAM upper DU: The message HYD-Y RSVR LO LVL and related actions come on. The single chime audio warning operates. On the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
33.On the reservoir of the Yellow hydraulic system:
Let the drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
34.Use the hydraulic ground-service cart or the hand pump to put fluid into the reservoir of the Yellow hydraulic system until the warnings on the ECAM displays go off.
35.On the ground service panel of the Green hydraulic system:	On the reservoir indicator 1834GQ:
Set the reservoir-filling manual selector-valve to NEUTRAL.	The yellow indicator light goes off. The indicator gives no indication of the fluid quantity of the reservoirs.
36.Close the circuit breaker 1832GQ.	The usual low-level warning system is operative.
37.Remove the hose and the adapter from the drain valve of the reservoir of the Yellow hydraulic system. 38.Remove the CONTAINER - HYDRAULIC FLUID RESISTANT and CONTAINER 1 L (1/4 USGAL).
39.Connect the hose and the adapter to the drain valve of the reservoir of the Blue hydraulic system. NOTE: The drain valve of the reservoir of the Blue hydraulic system is on the ground service panel of the Blue hydraulic system.
40.Put the free end of the hose into the CONTAINER - HYDRAULIC FLUID RESISTANT.
41.On the ground service panel of the Blue hydraulic system:
Carefully open the reservoir drain valve.	The fluid quantity of the reservoir decreases.
Control the flow of fluid and let the content of the reservoir decrease slowly.
42.When the the fluid quantity indicator 1834GQ on the Green ground service panel or the quantity indicator of the reservoir shows the fluid quantity between 2.0 l (0.53 USgal) and 2.3 l (0.61 USgal).	On the ECAM lower DU: The fluid quantity indication of the BLUE system shows the low fluid level. The color of the fluid quantity indication changes from green to amber. On the ECAM upper DU: The message HYD-B RSVR LO LVL and related actions come on. On the overhead panel 40VU: The BLUE/ELEC PUMP/FAULT light comes on. The single chime audio warning operates. On the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
43.On the ground service panel of the Blue hydraulic system:
Let the reservoir drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
44.On the ground service panel of the Green hydraulic system:	The reservoir of the Blue hydraulic system is connected to the reservoir filling system. On the reservoir indicator 1834GQ:
Set the reservoir-filling manual selector-valve 1134GQ to BLUE.	The blue indicator light comes on. The indicator shows the fluid quantity of the reservoir of the Blue hydraulic system.
45.Use the hydraulic ground-service cart or the hand pump to put fluid into the reservoir of the Blue hydraulic system until all the warnings go off.
46.Open the circuit breaker 1832GQ.	The usual low-level warning system is inoperative.
47.On the ground service panel of the Blue hydraulic system:
Carefully open the reservoir drain valve.	The fluid quantity of the reservoir decreases.
Control the flow of fluid and let the content of the reservoir decrease slowly.
48.When the fluid quantity indicator 1834GQ on the Green ground service panel, or the quantity indicator of the reservoir shows the fluid quantity between 2.9 l (0.77 USgal) and 2.7 l (0.71 USgal): Stop draining the reservoir of the Blue hydraulic system.
49.On the ground service panel of the Blue hydraulic system: Let the drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
50.On the ground service panel of the Blue hydraulic system: Move the free end of the hose from the CONTAINER - HYDRAULIC FLUID RESISTANT to the CONTAINER 1 L (1/4 USGAL).
51.On the ground service panel of the Blue hydraulic system: Carefully open the drain valve. Control the flow of fluid and let the content of the reservoir decrease slowly.
52.When the CONTAINER 1 L (1/4 USGAL) is fully filled.	On the ECAM lower DU: The color of the fluid quantity indication changes from green to amber. In the ECAM upper DU: The message HYD-B RSVR LO LVL and related actions come on. The single chime audio warning operates. In the glareshield panels 130VU and 131VU: The MASTER CAUT lights come on.
53.On the ground service panel of the Blue hydraulic system:
Let the reservoir drain valve go back to the closed position.	The flow of fluid from the reservoir stops.
54.Use the hydraulic ground-service cart or the hand pump to put fluid into the reservoir of the Blue hydraulic system until the warnings on the ECAM displays go off.
55.On the ground service panel of the Green hydraulic system:	On the reservoir indicator:
Set the reservoir-filling manual selector-valve to NEUTRAL.	The blue indicator light goes off. The indicator gives no indication of the fluid quantity of the reservoirs.
56.Close the circuit breaker 1832GQ.	The usual low-level warning system is operative.

5. Close-up
Subtask 29-31-00-860-050-B

A. Put the aircraft back to the serviceable condition
(1) Disconnect the hose and the adapter from the drain valve of the reservoir of the Blue hydraulic system.
(2) Remove the container.
(3) Stop the supply of air but do not disconnect the supply from the ground connector of the reservoir pressurization unit 1360GM.
(4) On the ground service panel of the Green hydraulic system, set the reservoir-filling manual selector-valve to BLUE.
(5) Use the hydraulic ground-service cart or the hand pump and fill the reservoir of the Blue hydraulic system to the same level as before the test.
(6) On the ground service panel of the Green hydraulic system, set the reservoir selector valve to YELLOW.
(7) Fill the reservoir of the Yellow hydraulic system to the same level as before the test.
(8) On the ground service panel of the Green hydraulic system, set the reservoir-filling manual selector-valve to GREEN.
(9) Fill the reservoir of the Green hydraulic system to the same level as before the test.
(10) On the ground service panel of the Green hydraulic system, set the reservoir-filling manual selector-valve to NEUTRAL.
(11) Make sure that all three reservoirs are pressurized to 50 psig. If necessary, use the air supply to fill them to the correct pressure.
(12) Set the ground connector of the reservoir pressurization unit 1360GM to the CLOSE position and disconnect the 98D29003501000 FILL UNIT-AIR PRESSURIZING TOOL, HYDRAULIC RESERVOIR or 98D29003501003 FILL UNIT - AIR.
(13) Disconnect the hydraulic fluid supply:
(a) If a hydraulic ground-service cart was used:
1 Disconnect the hose from the fill connection 1007GM.
2 Install the blanking cap on the fill connection.
(b) If the hand pump 1009GM was used:
1 Remove the hand pump lever 3270GM from the hand pump.
2 Retract the hand pump lever and put it in its position in the ground service panel of the Yellow hydraulic system.
3 Disconnect the flexible hose 1699GM from the reservoir fill valve 1698GM and put it back into its stowage.
4 Install the blanking cap on the reservoir fill valve.
(14) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(15) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(16) Remove the WARNING NOTICE(S).

Subtask 29-31-00-410-053-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right main door of the main landing gear (Ref. AMM TASK 32-12-00-410-001).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(4) Close the access doors 196BB 195BB 197CB 197EB 197FB 198CB.

[Rev.10 from 2021] 2026.04.01 00:27:30 UTC