Loss of the System Pressure of the Yellow Hydraulic System and Loss of the Correct Quantity in the Yellow Hydraulic Reservoir

TASK 52-36-00-810-805-A
Loss of the System Pressure of the Yellow Hydraulic System and Loss of the Correct Quantity in the Yellow Hydraulic Reservoir

1. Possible Causes

loss of the system pressure of the yellow hydraulic system
loss of the correct quantity in the yellow hydraulic reservoir

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 29-13-00-810-801-A	Loss of the Correct Quantity in the Yellow Hydraulic Reservoir
TSM TASK 29-13-00-810-805-A	Loss of the System Pressure of the Yellow Hydraulic System
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 29-23-00-860-001	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
AMM 29-23-00-860-002	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
AMM 71-00-00-710-003	Engine Automatic Start
AMM 71-00-00-710-027	Engine Shutdown

3. Fault Confirmation
Subtask 52-36-00-865-050-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/B/LEAK/TST	1881GP	N35
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34

Subtask 52-36-00-860-054-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

(1) Disconnect the isolation coupling of the PTU AMM 29-23-00-860-001.
(2) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(3) On panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/Y pushbutton switch is set to on (OFF light not on).
(4) On overhead panel 40VU, make sure that the YELLOW/ENG 2 PUMP pushbutton switch is set to on (OFF light not on).
(5) Start the RH engine AMM 71-00-00-710-003.
(6) Look for fault indications on the upper ECAM DU and the lower ECAM DU.
(7) Shut down the RH engine AMM 71-00-00-710-027.

Subtask 52-36-00-860-054-C ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

4. Fault Isolation
Subtask 52-36-00-810-062-A

A. If the fault confirmation gives:

the message HYD Y SYS LO PR on the upper ECAM DU,
the system name and the flow arrow of the Yellow hydraulic system in amber on the lower ECAM DU,
the message HYD Y RSVR LO LVL on the upper ECAM DU,
the content indication of the Yellow hydraulic system (shows low fluid level) on the lower ECAM DU in amber,
the PTU P/BSW FAULT on the panel 40VU,
the YELLOW ENG 2 PUMP P/BSW FAULT on the panel 40VU,
the INOP SYS message YELLOW HYD and CARGO DOOR in amber on the status page on the lower ECAM DU:
do the fault isolation procedures for the loss of the system pressure of the yellow hydraulic system (Ref. TSM TASK 29-13-00-810-805) and for the loss of the correct quantity in the yellow hydraulic reservoir (Ref. TSM TASK 29-13-00-810-801).

5. Close-up
Subtask 52-36-00-860-055-A

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are de-energized AMM 24-41-00-862-002.
(2) Make sure that the isolation coupling of the PTU is connected AMM 29-23-00-860-002.

[Rev.8 from Aug 2018] 2026.04.04 04:34:53 UTC