Operational Test of the System Pressure Switch , Pressure Transducer and the associated Indicating System of the Yellow Hydraulic System

TASK 29-32-00-710-003-A
Operational Test of the System Pressure Switch , Pressure Transducer and the associated Indicating System of the Yellow Hydraulic System

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.

FIN: 3065GN
FIN: 3151GN

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 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 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
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 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-863-002-A	Pressurize the Yellow Hydraulic System from the Green Hydraulic System through the PTU with the Ground Service Cart
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 29-32-00-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD/PRESS/XMTR	1841GN	C11
121VU	HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST	1881GP	N35

Subtask 29-32-00-860-055-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).

NOTE: This procedure pressurizes the Green hydraulic system together with the Yellow hydraulic system. If you do not want to pressurize the Green system, you must disconnect the PTU isolation coupling.

(2) If required, disconnect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-001).
(3) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(4) On the overhead panel 50VU, make sure that the HYD /LEAK MEASUREMENT VALVES/B pushbutton switch (P/BSW) is set to on (OFF light is not on).
(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, press the HYD pushbutton. Make sure that the ECAM lower display unit (DU) shows the HYD page.
(7) Make sure that the ECAM shows none of these conditions:

Yellow reservoir low air pressure,
Yellow reservoir low fluid contents.

(8) In addition, if you have not isolated the PTU, make sure that the ECAM does not show:

low air pressure in the reservoir of the Green hydraulic system,
low fluid contents in the reservoir of the Green hydraulic system.

(9) If necessary, pressurize the reservoir(s) (Ref. AMM TASK 29-14-00-614-002).
(10) 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).

4. Procedure
Subtask 29-32-00-710-052-A

A. Do this test:

ACTION	RESULT
1.Pressurize the Yellow hydraulic system from a ground supply, through the PTU or with the electric pump (Ref. AMM TASK 29-10-00-863-002) or (Ref. AMM TASK 29-23-00-863-002) or (Ref. AMM TASK 29-24-00-863-001).	On the ECAM lower DU: the Yellow system pressure is 3000 psi approximately. the system name is white. the flow arrow is green.
2.On the overhead panel 50VU: lift the guard and push and release the HYD /LEAK MEASUREMENT VALVES/Y P/BSW.	On the overhead panel 50VU: the OFF light of the HYD /LEAK MEASUREMENT VALVES/Y P/BSW comes on. On the ECAM lower DU: the color of the system name changes from white to amber. the color of the flow arrow changes from green to amber.
3.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002) or (Ref. AMM TASK 29-23-00-864-001) or (Ref. AMM TASK 29-24-00-864-001).	On the ECAM lower DU: the digital display of the system pressure shows the reduction of the pressure in the Yellow system. the color of the digital display of the system pressure changes from green to amber at approximately 1450 psi.

5. Close-up
Subtask 29-32-00-860-054-A

A. Put the aircraft back to the serviceable condition.
(1) On the overhead panel 50VU, push the HYD /LEAK MEASUREMENT VALVES/Y P/BSW. Make sure that the OFF light goes out.
(2) If the PTU is isolated, connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(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).

[Rev.10 from 2021] 2026.04.01 08:13:43 UTC