R 32-44-11-200-001 Check Nitrogen Charge Pressure On Parking/Emergency
R Accumulator By Reading Gauge 12-12-29-991-001 Fig. 301
3. Job Set-up
__________ Subtask 12-12-29-860-053
A. Aircraft Maintenance Configuration
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
NOTE : Do not depressurize the system reservoirs.
____
(3)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
(4)
Make sure that the aircraft is in this configuration:
-
the speed brakes and the spoilers are retracted,
-
the thrust reversers are stowed (closed),
-
the landing gear is extended and the landing gear doors are closed,
-
the FWD and AFT cargo-compartment doors 825 and 826 are closed,
-all the other hydraulically controlled systems are in the normal position.
Subtask 12-12-29-010-056
B. Get Access
(1)
Open access panel 197CB.
(2)
Open the left MLG door (Ref. TASK 32-12-00-010-001).
(3) Put the access platform in position. Subtask 12-12-29-210-053
C. Inspection of the Pressure Values
(1)
Make sure that the nitrogen fill pressure of the brake accumulator 2582GM is correct (Ref. TASK 32-44-11-200-001).
(2)
Make sure that the hydraulic accumulators 1070GM, 2070GM and 3070GM have a nitrogen pressure of 130 bar (1885.4901 psi) at 20 DEG.C
(68.00 DEG.F).
(3)
If necessary, adjust the nitrogen pressure (Ref. TASK 12-14-29-614-001).
(4)
Make sure that the pressure on the indicator of the related reservoir is 3.5 +0.3 -0 bar (50.7631 +4.3511 -0.0000 psi). If necessary, pressurize the reservoir (Ref. TASK 29-14-00-614-002).
Subtask 12-12-29-863-051
D. Pressurize the Auxiliary Braking System.
(1)
Pressurize the Yellow hydraulic system with the E-pump (Ref. TASK 29-24-00-863-001) to pressurize the brake accumulator system to 206 bar (2987.7766 psi).
(2)
On the panel 110VU, put the parking brake control switch 73GG to the ON position.
(3)
Make sure that the pressure on the triple indicator 60GG shows the left and right pressure values.
(4)
Depressurize the Yellow hydraulic system (Ref. TASK 29-24-00-864-001).
NOTE : Do not depressurize the alternate braking system.
____
(5)
Put the warning notices in the cockpit to tell persons not to pressurize the hydraulic systems.
(6)
Close the left MLG door (Ref. TASK 32-12-00-410-001).
1EFF : ALL 1 12-12-29Page 313 1 1 Nov 01/04R 1 1 1CES 1
4. Procedure
_________
(Ref. Fig. 301/TASK 12-12-29-991-001)
Subtask 12-12-29-611-053
A. Fill the Hydraulic Reservoirs (Refer to the Table).
R (1) Connect the Hydraulic Service Cart.
R R R R R R R R R CAUTION : BE CAREFUL WHEN YOU CONNECT THE GROUND HYDRAULIC CART. MAKE_______ SURE THAT THE SUPPLY PRESSURE AND THE FLOW RATE ARE LESS THAN THESE LIMITS: - THE SUPPLY PRESSURE MUST BE LESS THAN 30 BAR (435.1132 PSI). - THE FLOW RATE MUST BE LESS THAN 12L/MIN (3.1700 US GAL/MIN). IF THE SUPPLY PRESSURE AND THE FLOW RATE ARE MORE THAN THESE LIMITS, DAMAGE CAN OCCUR TO THE HYDRAULIC RESERVOIR.
R
R R R R (a) Remove the blanking cap and connect a hydraulic service cart with the HYDRAULIC FLUIDS (Material No. 02-003), HYDRAULIC FLUIDS (Material No. 02-003A), HYDRAULIC FLUIDS (Material No. 02-003B), HYDRAULIC FLUIDS (Material No. 02-003C) or the HYDRAULIC FLUIDS (Material No. 02-003D) to the reservoir fill connection 1007GM.
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