(2)
Open the access panel 195BB.
(3)
Open the left or the right MLG door (Ref. TASK 32-12-00-010-001).
(4)
Put the access platform below the Zone 195.
(5) Put the access platform below the MLG bay.
Subtask 12-36-29-680-052
D. Drain the reservoir of the Blue hydraulic system (Ref. TASK 29-10-00-680-003).
Subtask 12-36-29-860-105
E. Preparation for the Fluid Change
(Ref. Fig. 316/TASK 12-36-29-991-016)
CAUTION : MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE
_______
GROUND HYDRAULIC CART ARE SET TO A MINIMUM.
(1) Put the container below the electrically driven pump 2075GJ.
Change of the Hydraulic Fluid in the Blue Hydraulic System - Schematic
Figure 316/TASK 12-36-29-991-016
(2)
Connect the pressure hose of the hydraulic power cart (filled with new hydraulic fluid) to the delivery connector 2008GM at the ground service panel.
(3)
Connect the return hose of the auxiliary hydraulic reservoir with a capacity of 60 l (16 USgal) to the suction connector 2006GM at the ground service panel.
NOTE : The auxiliary hydraulic reservoir must have a contents gage.
____
4. Procedure
_________ (Ref. Fig. 316/TASK 12-36-29-991-016) Subtask 12-36-29-611-063
A. Fluid Change Procedure without the Suction Line of the Blue Electric Pump (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 3 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 3 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 elevators operate.
____
(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 slats operate.
____
(4)
Stop the hydraulic power cart.
(5)
On the panel 50VU in the cockpit, lift the guard and push the HYD/LEAK MEASUREMENT VALVES/B P/BSW (the OFF light comes on).
(6)
Make sure that the manual selector valves on the leakage measurement selector-valve 2146GM (in the MLG bay) are in the OFF position.
(7)
Disconnect the pressure hose of the hydraulic power cart from the delivery connector 2008GM at the ground service panel.
R **ON A/C 001-049, 051-061, 101-105, 201-203,
Subtask 12-36-29-611-062
B. Fluid Change Procedure of the Suction Line of the Blue Electric Pump (Ref. detail B)
CAUTION : MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE
_______
GROUND HYDRAULIC CART ARE SET TO A MINIMUM.
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.
NOTE : Make sure that the supply pressure of the ground hydraulic cart
____
does not become more than 50 psi (3.4473 bar).
(1) Depressurize the reservoir of the Blue hydraulic system (Ref. TASK
29-14-00-614-001).
NOTE : Be careful when you disconnect the hydraulic connections:
____ A great quantity of hydraulic fluid comes out of the line end fittings.
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