-
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES

 -
THE LANDING GEAR AND THE RELATED DOORS

 -COMPONENTS THAT MOVE.
 WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
R WARNING : DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
_______ R - FLUSH IT AWAY WITH CLEAN WATER R - GET MEDICAL AID.
 1. Reason for the Job
__________________
 To flush the Yellow hydraulic system after a failure in the electrically driven pump 3075GX
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific adaptor
 No specific blanking plugs
 No specific hydraulic power cart
 No specific safety barriers
 No specific warning notices
 No specific access platform 2.0 m (6 ft. 7 in.)
 No specific containers 5 l (1.3208 USgal)

 B. Referenced Information

 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
 from the External Power
 29-00-00-910-002 Safety Procedures of the Hydraulic System
 29-10-00-863-002 Pressurize the Yellow Hydraulic System

R 29-10-00-863-003 Pressurize the Blue Hydraulic System with a Ground
R Power Supply 29-10-00-864-002 Depressurize the Yellow Hydraulic System 29-13-44-610-001 Servicing of the LP-Filter (3002GM) 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 32-12-00-010-001 Open the Main Gear Doors for Access 32-12-00-410-001 Close the Main Gear Doors after Access 12-36-29-991-006 Fig. 306
 3. Job Set-up
__________
 (Ref. Fig. 306/TASK 12-36-29-991-006)
 Subtask 12-36-29-860-065
 A. Aircraft Maintenance Configuration
 (1)
 Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).

 (2)
 Depressurize the Yellow hydraulic system (Ref. TASK 29-10-00-864-002).

 (3)
 Depressurize the reservoir of the Yellow hydraulic system (Ref. TASK 29-14-00-614-001).

 (4)
 De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002)

 Subtask 12-36-29-010-089
 B. Get Access
 (1)
 Open the right MLG door (Ref. TASK 32-12-00-010-001).

 (2)
 Open the access door 198CB.

 (3)
 Open the access panel 196BB.

 Yellow Hydraulic System of the Electrically Driven Pump 3075GX - Flushing
 Schematic
 Figure 306/TASK 12-36-29-991-006

 Subtask 12-36-29-860-066

 C. Preparation for the Flushing Procedure
 (1)
 Put the access platform in position at the Zone 148.

 (2)
 Put the safety barriers in position.

 (3)
 Put the warning notices in position

 (4)
 Put the containers in position to collect the hydraulic fluid below:

 -
the electrically driven pump 3075GX,

 -
the LP manifold 3003GM.

 (5)
 Disconnect the pressure line from the electrically driven pump 3075GX.

 (6)
 Disconnect the case drain line from the electrically driven pump 3075GX.

 (7)
 Disconnect the case drain line from the LP manifold 3003GM.

 (8)
 Put the hydraulic power cart in position as necessary. CAUTION : MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE

_______ GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

 (9)
 Connect the pressure hose (of the hydraulic power cart) to the case drain line at the electrically driven pump 3075GX with an adaptor.

 (10)
 Connect the return hose (of the hydraulic power cart) to the case drain line at the LP manifold 3003GM with an adaptor.

 (11)
 Put blanking plugs on the disconnected line ends.

 4. Procedure
_________
 (Ref. Fig. 306/TASK 12-36-29-991-006) Subtask 12-36-29-170-055
 A. Flush the Yellow hydraulic system.
 (1)
 Operate the hydraulic power cart for 20 s at 20 bar (290.0754 psi).
　
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