Operational Test of the Phase Unbalance Detector and the Current Transformer of the Yellow Hydraulic System

TASK 29-24-00-710-002-A
Operational Test of the Phase Unbalance Detector and the Current Transformer 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: 3807GX
FIN: 3808GX

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
822

C. 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 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Phase Unbalance Detector

3. Job Set-up
Subtask 29-24-00-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 29-24-00-010-051-A

B. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the access door 822.
(2) Open the access door 822 (Ref. AMM TASK 52-41-00-010-002).

Subtask 29-24-00-860-056-A

C. 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 (P/B). Make sure that the HYD page is shown on the ECAM lower Display Unit (DU).
(4) Make sure that the ECAM system does not show one 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).

4. Procedure
Subtask 29-24-00-710-051-A

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.

A. Do this test:

ACTION	RESULT
1.On overhead panel 40VU: push the YELLOW ELEC PUMP pushbutton switch (P/BSW).	On overhead panel 40VU: the ON legend of the YELLOW ELEC PUMP P/BSW comes on. The electric pump of the Yellow hydraulic system starts. On the ECAM lower DU: the pressure of the YELLOW hydraulic system is approximately 3000 psi.
2.On the phase unbalance detector: push and hold the TEST P/B.	On the phase unbalance detector: the test indicator light comes on. The electric pump of the Yellow hydraulic system stops. On the overhead panel 40VU: - the YELLOW ELEC PUMP/FAULT light comes on. On the ECAM lower DU: - the pressure of the YELLOW hydraulic system is 0 psi. the color of the system name changes from white to amber.
3.On the phase unbalance detector: release the TEST P/B.	On the phase unbalance detector: the test indicator light stays on.
4.On overhead panel 40VU: push and release the YELLOW ELEC PUMP P/BSW.	On the overhead panel 40VU: the ON/FAULT light of the YELLOW ELEC PUMP P/BSW goes off. On the phase unbalance detector: the test indicator light goes off.
5.On overhead panel 40VU: push the YELLOW ELEC PUMP P/BSW.	On the overhead panel 40VU: the ON light of the YELLOW ELEC PUMP P/BSW comes on. The electric pump of the Yellow hydraulic system starts to operate. On the lower DU of the ECAM: the pressure in the Yellow hydraulic system is 3000 psi approximately. the color of the system name changes from amber to white.
6.On the overhead panel 40VU: push the YELLOW ELEC PUMP P/BSW.	On the overhead panel 40VU: the ON light goes off. The operation of the electric pump of the Yellow hydraulic system stops.

5. Close-up
Subtask 29-24-00-860-057-A

A. Put the aircraft back to the serviceable condition.
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 29-24-00-410-051-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 822 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 08:13:17 UTC