Operational Test of the Yellow Hydraulic System

TASK 29-13-00-710-002-A
Operational Test of the Yellow Hydraulic System

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
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 29-14-00-614-002-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 71-00-00-860-817-A	Motor the Engine (Dry Method)

3. Job Set-up
Subtask 29-13-00-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
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

Subtask 29-13-00-860-052-A

B. 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 on the center pedestal, press the HYD pushbutton switch P/BSW. Make sure that the HYD page is shown on the lower Display Unit (DU) of the ECAM.
(4) Make sure that the ECAM does not show any of these conditions;

low air pressure in the Yellow reservoir,
low fluid level in the Yellow reservoir.

(5) If necessary, pressurize the reservoir (Ref. AMM TASK 29-14-00-614-002).
(6) If necessary, add fluid to the reservoir (Ref. AMM TASK 12-12-29-611-001).
(7) On the overhead panel 40VU, press the PTU/AUTO P/BSW (the OFF light comes on).
(8) On the overhead panel 40VU, make sure that the YELLOW/ENG 2 PUMP P/BSW is set to on. (FAULT and OFF lights are out).

4. Procedure
Subtask 29-13-00-710-051-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: 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. Operational Test of the Yellow Hydraulic System

ACTION	RESULT
1.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	the right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn. On the ECAM upper DU: the speed of the right (No. 2) engine is approximately 20% N2 RPM. On the ECAM lower DU: the pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: the vertical line between the EDP box and the system indication changes from green to amber. the engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line. the pressure in the Yellow hydraulic system decreases to 0 psi.
On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: the pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi. the engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line. the vertical line between the EDP box and the system indication changes from amber to green.
3.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	On the ECAM lower DU: the pressure in the Yellow hydraulic system decreases to 0 psi.

Subtask 29-13-00-710-051-B ** 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: 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. Operational Test of the Yellow Hydraulic System

ACTION	RESULT
1.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	the right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn. On the ECAM upper DU: the speed of the right (No. 2) engine is approximately 20% N2 RPM. On the ECAM lower DU: the pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: the vertical line between the EDP box and the system indication changes from green to amber. the engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line. the pressure in the Yellow hydraulic system decreases to 0 psi.
On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: the pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi. the vertical line between the EDP box and the system indication changes from amber to green. the engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line.
3.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	On the ECAM lower DU: the pressure in the Yellow hydraulic system decreases to 0 psi.

Subtask 29-13-00-710-051-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: 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. Operational Test of the Yellow Hydraulic System

ACTION	RESULT
1.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-045).	the right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn. On the ECAM upper DU: the speed of the right (No. 2) engine is approximately 20% N2 RPM. On the ECAM lower DU: the pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: the vertical line between the EDP box and the system indication changes from green to amber. the engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line. the pressure in the Yellow hydraulic system decreases to 0 psi.
On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: the pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi. the vertical line between the EDP box and the system indication changes from amber to green. the engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line.
3.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-045).	On the ECAM lower DU: the pressure in the Yellow hydraulic system decreases to 0 psi.

Subtask 29-13-00-710-051-D ** 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: 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. Operational Test of the Yellow Hydraulic System

ACTION	RESULT
1.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-860-817).	the right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn. On the ECAM upper DU: the speed of the right (No. 2) engine is approximately 20% N2 RPM. On the ECAM lower DU: the pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: the vertical line between the EDP box and the system indication changes from green to amber. the engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line. the pressure in the Yellow hydraulic system decreases to 0 psi.
On the overhead panel 40VU: press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: the YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: the pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi. the engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line. the vertical line between the EDP box and the system indication changes from amber to green.
3.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-860-817).	On the ECAM lower DU: the pressure in the Yellow hydraulic system decreases to 0 psi.

5. Close-up
Subtask 29-13-00-860-053-A

A. Put the aircraft back to the serviceable condition.
(1) On the overhead panel 40VU, press and release the PTU/AUTO P/BSW, (the OFF light goes out).
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 07:50:46 UTC