TASK 29-10-00-864-003
Depressurize the Blue Hydraulic System
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
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
__________________
To make sure that the Blue hydraulic system is depressurized before work is done on the system.
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 -------------------------------------------------------------------------------
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure
3. Job Set-up
__________ Subtask 29-10-00-860-078
A. Aircraft Maintenance Configuration
(1)
Stop any supply of hydraulic power to the Blue hydraulic system through the ground connections.
(2)
If the Blue electric pump is in operation:
-in the flight compartment (on section 40VU of the overhead panel) push and release the BLUE ELEC PUMP pushbutton switch (P/BSW).
1EFF : ALL 1 29-10-00Page 209 1 1 May 01/01R 1 1 1CES 1
(3)
Make sure that the OFF legend comes on.
(4)
Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. TASK 31-60-00-860-001).
(5)
On the ECAM control panel on the center pedestal, push the HYD pushbutton swich (P/BSW) . Make sure that the lower (display) shows the HYD page.
Subtask 29-10-00-865-051
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU HYD/HYD PWR/B WARN/& CTL 2702GJ C12 123VU B HYD/ELEC PUMP 2701GJ AB09
4. Procedure
_________ R **ON A/C 001-049, 051-058, 101-101,
Subtask 29-10-00-864-052
A. Depressurization
(1) Refer to the ECAM indication of the BLUE system pressure and make sure it shows 0.
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.
(2) If the ECAM indication of the BLUE system pressure does not show 0, operate the rudder to reduce the pressure to zero.
R **ON A/C 059-099, 102-149, 151-199, 201-299, 301-399, 401-499,
Subtask 29-10-00-864-052-A
A. Depressurization NOTE : When the hydraulic pressure supply stops, the pressure decreases
____ quickly to approximately 700 psi / 50 bar. From this value the pressure decreases very slowly to zero (approximately 15 minutes).
(1) Refer to the ECAM indication of the BLUE system pressure and make sure it shows 0.
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.
(2) If the ECAM indication of the BLUE system pressure does not show 0, operate the rudder to reduce the pressure to zero.
**ON A/C ALL
5. Close-up
________
Subtask 29-10-00-865-052
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 2701GJ, 2702GJ.
Subtask 29-10-00-869-050
B. Do the EIS stop procedure
(Ref. TASK 31-60-00-860-002).
Subtask 29-10-00-862-055
C. De-energize the electrical circuits (Ref. TASK 24-41-00-862-002).
TASK 29-10-00-864-004
Depressurize the Brake System
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
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