3. Job Set-up
__________ Subtask 29-13-49-860-073
A. Aircraft Maintenance Configuration
(1)
Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001)
(2)
Depressurize the Yellow hydraulic reservoir (Ref. TASK 29-14-00-614-001).
(3)
Put warning notice(s) in position to tell persons not to pressurize the Yellow hydraulic system: - on the ground service panel 198CB.
(4)
Put warning notice(s) on the access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.
Subtask 29-13-49-941-067
B. Safety Precautions
(1)
On the center pedestal, on the ENG panel 115VU:
-put warning notice(s) to tell persons not to start the engine.
(2)
Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3)
Put warning notice(s) in position to tell persons not to pressurize the Yellow hydraulic system:
-in the cockpit, on the HYD section of the overhead panel 40VU.
(4)
On the overhead maintenance panel 50VU:
-make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(5)
Put warning notice(s) to tell persons not to energize the FADEC 1(2).
(6)
Put a container below the top case drain hose/tube (20) connection to the hydraulic filter assembly to collect the remaining fluid.
Subtask 29-13-49-010-065
C. Get Access
R (1) Open the left fan-cowl door (Ref. TASK 71-13-00-010-040): FOR 1000EM2 open the door 447AL.
(2)
Put the access platform in position at the engine.
Subtask 29-13-49-865-055
D.
Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 3700GD Q37
4. Procedure
_________
(Ref. Fig. 405/TASK 29-13-49-991-908)
Subtask 29-13-49-020-056
A. Removal of the Top Case Drain Hose/Tube Assembly
(1) Disconnect the case drain hose/tube (20) from the hydraulic filter assembly and let the fluid flow in the container.
NOTE : Use a second wrench to hold the union on the filter assembly
____ when you loosen the coupling nut on the case drain hose/tube (20).
(2)
Remove the bolt (25), the washer (10) and the clamp (15) that attach the case drain hose/tube (20) to the lower channel.
(3)
Remove the bolt (5), the washer (10) and the clamp (15) that attach the case drain hose/tube (20) to the higher channel.
(4)
Remove the bolt (5), the washer (10) and the clamp (15) that attach the case drain hose/tube (20) to the higher bracket.
(5)
Disconnect the pressure relief valve tube from the tee-fitting on the
Top Case Drain Hose/Tube Assembly
Figure 405/TASK 29-13-49-991-908
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case drain hose/tube (20).
NOTE : Use a second wrench to hold the flats on the tee-fitting when
____ you loosen the coupling nut on the pressure relief valve tube.
(6)
Disconnect the case drain hose/tube (20) from the fluid disconnect panel at the top of the engine.
(7)
Remove the case drain hose/tube (20) from the engine.
(8)
Put protective covers on the case drain hose/tube (20), the union in the filter assembly, the pressure relief valve tube and the fitting on the fluid disconnect panel.
TASK 29-13-49-400-003
Installation of the Top Case Drain Hose/Tube Assembly
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
WARNING : DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER
_______ THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.
CAUTION : DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC
_______ FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
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