Depressurize the Yellow Hydraulic System

TASK 29-24-00-864-001-A
Depressurize the Yellow Hydraulic System

1. Reason for the Job
To depressurize the Yellow hydraulic system when it is pressurized with the electric pump.
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
Indications and Controls of the Yellow Hydraulic System

3. Job Set-up
Subtask 29-24-00-860-051-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ECAM is set to on (Ref. AMM TASK 31-60-00-860-001).
(2) Make sure that the ECAM lower display unit shows the HYD page.

4. Procedure
Subtask 29-24-00-864-050-A

A. Depressurization

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.

(1) On the overhead panel 40VU, push and release the YELLOW ELEC PUMP pushbutton switch 3804GX.
(2) Make sure that the ON legend goes off.
(3) Make sure that the yellow electric pump stops.
(4) Operate the rudder pedals or wait for internal leakage to release the pressure.

5. Close-up
Subtask 29-24-00-860-053-A

A. Put the aircraft back to the serviceable condition.
(1) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002), if it has been disconnected.
(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 04:12:25 UTC