(2)
Depressurize the Green hydraulic system (Ref. TASK 29-10-00-864-001).
(3)
Depressurize the reservoir of the Green hydraulic system (Ref. TASK 29-14-00-614-001).
(4)
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
Subtask 12-36-29-010-090
B. Get Access
(1)
Open the left MLG door (Ref. TASK 32-12-00-010-001).
(2)
Open the access door 197CB.
Green Hydraulic System of the Flap PCU 6201CM - Flushing Schematic
Figure 307/TASK 12-36-29-991-007
Subtask 12-36-29-860-069
C. Preparation for the Flushing Procedure
(1)
Put the warning notices in position.
(2)
Put the safety barriers in position.
(3)
Put the access platform in position at the Zone 147.
(4)
Put the containers in position to collect the hydraulic fluid below:
-
the flap PCU 6201CM,
-
the LP manifold 1003GM.
(5)
Disconnect the case drain line from the motor in the Green hydraulic system of the flap PCU 6201CM.
(6)
Disconnect the pressure line from the valve block 23CV in the Green hydraulic system of the flap PCU 6201CM.
(7)
Disconnect the case drain line from the LP manifold 1003GM.
(8)
Put the hydraulic power cart in position as necessary.
(9)
Connect the pressure line to the case drain line with a union at the flap PCU 6201CM.
CAUTION : MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE
_______ GROUND HYDRAULIC CART ARE SET TO A MINIMUM.
(10)
Connect the pressure hose of the hydraulic power cart to the delivery connector 1008GM with an adaptor.
(11)
Connect the return hose (of the hydraulic power cart) to the case drain line at the LP manifold 1003GM with an adaptor.
(12)
Put blanking plugs on the disconnected line ends.
4. Procedure
_________ (Ref. Fig. 307/TASK 12-36-29-991-007) Subtask 12-36-29-170-056
A. Flush the Green hydraulic system.
(1) Operate the hydraulic power cart for 20 s at 20 bar (290.0754 psi).
(2) Stop the hydraulic power cart. Subtask 12-36-29-960-056
B. Replace the LP filter element 1002GM (Ref. TASK 29-11-44-610-001).
5. Close-up
________ Subtask 12-36-29-860-070
A. Put the system back to the serviceable condition.
(1)
Disconnect the pressure hose of the hydraulic power cart and the adaptor from the delivery connector 1008GM.
(2)
Disconnect the return hose of the hydraulic power cart and the adaptor from the case drain line.
(3)
Disconnect and remove the union from the case drain line and the pressure line at the flap PCU 6201CM.
(4)
Remove the hydraulic power cart.
(5)
Remove the blanking plugs.
(6)
Connect the case drain line to the LP manifold 1003GM.
(7)
Connect the case drain line to the motor in the Green hydraulic system of the flap PCU 6201CM.
(8)
Connect the pressure line to the valve block 23CV.
Subtask 12-36-29-790-056
B. Leak Test of the Components which were Disconnected
(1)
Pressurize the Green hydraulic system (Ref. TASK 29-10-00-863-001).
(2)
Make sure that there is no hydraulic fluid leakage.
(3)
Depressurize the Green hydraulic system (Ref. TASK 29-10-00-864-001). Subtask 12-36-29-942-095
C. Put the aircraft back to its initial configuration.
(1)
Remove the containers.
(2)
Remove the safety barriers.
(3)
Remove the access platform(s).
(4)
Remove the warning notice(s). Subtask 12-36-29-410-077
D. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the left MLG door (Ref. TASK 32-12-00-410-001).
(3)
Close the access door 197CB.
(4)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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