NOTE : You can open any one of the two doors, but access is better
____
 from the right side.

 (5)
 Disconnect the PTU isolation coupling (Ref. TASK 29-23-00-860-001). NOTE : If necessary, you can now pressurize the Green hydraulic

____
 system.

 (6)
 Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. TASK 31-60-00-860-001).

 (7)
 On the ECAM control panel on the center pedestal, push the HYD pushbutton switch (P/BSW) . Make sure that the lower (system) display shows the HYD page.

 Subtask 29-10-00-865-053
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU HYDRAULIC/HYD POWER/Y 3803GX N30 123VU Y HYD/ELEC/PUMP 3802GX AB06 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
 1EFF : ALL 1 29-10-00Page 205 1 1 May 01/01R 1 1 1CES 1

 4. Procedure
_________

R **ON A/C 001-049, 051-058, 101-101,
 Subtask 29-10-00-864-050
 A. Depressurization
 (1) Refer to the ECAM indication of the YELLOW 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 YELLOW system pressure does not show 0, operate the rudder to reduce the pressure to zero.
 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON
_______
 THE LANDING GEAR.

 (3) If you will work on the auxiliary/parking brake systems:
 (a)
 Operate the manual depressurization button on the brake relief valve 3067GM to release the pressure.

 (b)
 On panel 110VU of the center pedestal, operate the PARKING BRK switch and refer to the triple gage on panel 400VU.

 (c)
 Set the PARKING BRK switch to ON.

 (d)
 Make sure that the triple gage shows zero pressure on all three indicators.

R **ON A/C 059-099, 102-149, 151-199, 201-299, 301-399,
 Subtask 29-10-00-864-050-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 YELLOW 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 YELLOW system pressure does not show 0, operate the rudder to reduce the pressure to zero.
 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON_______ THE LANDING GEAR.
 (3) If you will work on the auxiliary/parking brake systems:
 (a) Operate the manual depressurization button on the brake relief valve 3067GM to release the pressure.
 (b) On panel 110VU of the center pedestal, operate the PARKING BRK switch and refer to the triple gage on panel 400VU.
 (c) Set the PARKING BRK switch to ON.
 (d) Make sure that the triple gage shows zero pressure on all three indicators. 
R  **ON A/C 401-499, 
R  Subtask 29-10-00-864-050-B 
R  A. Depressurization 
R R  (1) Refer to the ECAM indication of the YELLOW system pressure and make sure it shows 0. 
R R R  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. 
R R  (2) If the ECAM indication of the YELLOW system pressure does not show 0, operate the rudder to reduce the pressure to zero. 
R R  WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON_______ THE LANDING GEAR. 

R 1EFF : 059-099, 102-149, 151-199, 201-299, 1 29-10-00Page 207 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1

R  (3) If you will work on the auxiliary/parking brake systems: 
R  (a) Set the Anti-Skid and Nose Wheel switch to OFF. 
R R  (b) Operate the left and right brake pedals as necessary to release the pressure in the yellow accumulator. 
R  (c) Set the PARKING BRK switch to ON. 
R R  (d) Make sure that the triple gage shows zero pressure on all three indicators.
 **ON A/C ALL
 5. Close-up________
 Subtask 29-10-00-865-050
　
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