TASK 29-24-00-864-001
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 -------------------------------------------------------------------------------
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 29-23-00-860-002 Connection of the Isolation Coupling of the Power
Transfer Unit (PTU)
31-60-00-860-001 EIS Start Procedure
31-60-00-860-002 EIS Stop Procedure
29-24-00-991-001 Fig. 201
3. Job Set-up
__________ Subtask 29-24-00-860-051 R A. Aircraft Maintenance Configuration
(1)
Make sure that the ECAM is set to on (Ref. TASK 31-60-00-860-001).
(2)
Make sure that the ECAM lower display unit shows the HYD page.
4. Procedure
_________
(Ref. Fig. 201/TASK 29-24-00-991-001)
Subtask 29-24-00-864-050
A. Depressurization WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE
_______ CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
(1) On the overhead panel 40VU, push and release the YELLOW ELEC PUMP pushbutton switch 3408GX.
(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. Put the aircraft back to the serviceable condition.
R R (1) Connect the PTU isolation coupling (Ref. TASK 29-23-00-860-002), if it has been disconnected.
R (2) Do the EIS stop procedure (Ref. TASK 31-60-00-860-002).
R R (3) De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
YELLOW AUXILIARY HYDRAULIC POWER (ELECTRIC/HAND PUMPS)
______________________________________________________ DEACTIVATION/REACTIVATION
_________________________ TASK 29-24-00-040-001 Deactivation of the Yellow Electric Pump WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______ CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
1. Reason for the Job
__________________
Refer to the MMEL TASK: 29-24-01
Main Hydraulic Power
Yellow System Electric Pump
(FAA Only)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
3. Job Set-up
__________ Subtask 29-24-00-860-058
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(2)
Make sure that the YELLOW ELEC PUMP pushbutton switch 3408GX on the overhead panel 40VU is in the OFF position (the ON legend is off).
4. Procedure
_________ Subtask 29-24-00-865-053
A. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
122VU DOORS/CARGO 1MJ T12
Subtask 29-24-00-941-051
B. Put a warning notice in the flight compartment to tell the crew that the Yellow electric pump does not operate.
5. Close-up
________ Subtask 29-24-00-862-053
A. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
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