(2)
Open the engine 1 fan-cowl doors (Ref. TASK 71-13-00-010-040).
(3)
Open the left or the right MLG door (Ref. TASK 32-12-00-010-001).
(4)
Put the access platform in position at the engine 1.
(5) Put the access platform in position at the MLG bay.
Subtask 12-36-29-680-050
D. Drain the reservoir of the Green hydraulic system (Ref. TASK 29-10-00-680-001).
Subtask 12-36-29-860-095
E. Preparation for the Fluid Change
(Ref. Fig. 314/TASK 12-36-29-991-014)
CAUTION : MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE
_______
GROUND HYDRAULIC CART ARE SET TO A MINIMUM.
(1) Put the NLG on to the turntable (to prevent damage to the tires when the steering is operated).
Change of the Hydraulic Fluid in the Green Hydraulic System - Schematic
Figure 314/TASK 12-36-29-991-014
(2)
Put the container below the fluid disconnect panel at the engine 1 to
collect the hydraulic fluid leakage.
(3)
Connect the pressure hose of the hydraulic power cart (filled with new hydraulic fluid) to the delivery connector 1008GM at the ground service panel (Ref. detail A).
(4)
Connect the return hose of the auxiliary hydraulic reservoir, with capacity of 120 l (31.7 USgal) to the suction connector 1006GM at the ground service panel.
NOTE : The auxiliary hydraulic reservoir must have a contents gage.
____
4. Procedure
_________ (Ref. Fig. 314/TASK 12-36-29-991-014) Subtask 12-36-29-611-055
A. Fluid Change Procedure without Hydraulic Lines of the Engine Driven Pump (EDP) (Ref. detail A)
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.
CAUTION : DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART
_______ DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.
(1)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
(2)
Operate the hydraulic power cart. NOTE : Increase the rate of flow and the pressure as necessary.
____
(3)
In the cockpit, operate the flight controls. 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.
(a) On the panel 11VU, move the GND SPLRS ARMED lever to the FULL position and then to the RET position. Do this step 3 times.
NOTE : The spoilers 1 and 5 LH and RH operate.
____
(b) On the panel 18VU or 19VU, move the side stick fully to the left and then fully to the right. Do this step 3 times.
NOTE : The ailerons and spoilers 5 LH and RH operate.
____
(c) On the panel 18VU or 19VU, move the side stick fully forward and then fully rearward. Do this step 3 times.
NOTE : The LH elevator operates.
____
(d) At the captain or first officer position, push the LH pedal fully forward and then the RH pedal fully forward. Do this step 3 times.
NOTE : The rudder operates.
____
(e) On the panel 114VU, move the flap/slat lever to the FULL position and then to the 0 deg position. Do this step 2 times.
NOTE : The flaps and slats operate.
____
(f) On the center pedestal, turn one of the pitch-trim control wheels to the DN stop and then to the UP stop. Do this step 3 times. Turn the pitch-trim control wheel to the 0 deg position.
NOTE : The THS operates.
____
(4) Stop the hydraulic power cart. Subtask 12-36-29-860-099
B. Isolation of the Primary Flight Controls
(1) Energize the solenoid valve 1150GP in the MLG bay.
(a) On the panel 50VU in the cockpit, lift the guard and push the HYD/LEAK MEASUREMENT VALVES/G P/BSW (the OFF light comes on).
Subtask 12-36-29-611-056
C. Continuatation of the Fluid Change without the Hydraulic Lines of the EDP (Ref. detail A)
WARNING : MAKE SURE THAT THE TRAVEL RANGE OF THE THRUST REVERSER IS CLEAR
_______ BEFORE YOU PRESSURIZE THE HYDRAULIC SYSTEM. IF NOT YOU CAN CAUSE BAD INJURY TO PERSONNEL.
CAUTION : DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART
_______ DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.
1EFF : ALL 1 12-36-29Page 387 1 1 Nov 01/98R 1 1 1CES 1
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