3. Job Set-up
__________ Subtask 29-11-49-860-083
A. Aircraft Maintenance Configuration
(1)
Depressurize the Green hydraulic system (Ref. TASK 29-23-00-864-001).
(2)
Depressurize the Green hydraulic reservoir (Ref. TASK 29-14-00-614-001).
(3)
Put warning notice(s) in position to tell persons not to pressurize the Green hydraulic system: - on the ground service panel 197CB.
(4)
Put warning notice(s) on the access door 195BB to tell persons not to pressurize the Green hydraulic reservoir.
Subtask 29-11-49-941-073
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 Green 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 under the pressure relief valve.
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Subtask 29-11-49-865-059
C. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
121VU HYDRAULIC/G HYD/PUMP ENG1/MONG 1702GK R34
Subtask 29-11-49-010-073
D. Get Access
(1)
Open the left fan cowl door: FOR 1000EM1 - open the door 437AL (Ref. TASK 71-13-00-010-040).
(2)
Put the access platform in position at the engine.
4. Procedure
_________ R (Ref. Fig. 409/TASK 29-11-49-991-911, 410/TASK 29-11-49-991-912) Subtask 29-11-49-020-065
A. Removal of the Pressure-Relief Valve Hose/Tube
(1) Disconnect the higher pressure relief valve hose/tube (25) from the lower pressure-relief valve tube (20) and let the fluid flow into the container.
NOTE : Use a second wrench to hold the lower pressure-relief valve
____ tube when you loosen the coupling nut on the higher pressure-relief valve tube.
(2)
Disconnect the pressure-relief valve hose/tube (25) from the pressure-relief valve interface.
(3)
Remove the bolts (5), the washers (10), the nuts (15) and the clamps
(20) that attach the pressure-relief valve hose/tube (25) to the engine brackets at flange STA.199(A2).
(4)
Remove the pressure-relief valve hose/tube (25) from the engine.
(5)
Put protective covers on the pressure-relief valve tube (30), the fitting on the top case drain hose/tube and the pressure-relief valve hose/tube (25).
(6)
Disconnect the lower pressure-relief valve tube (30) from the top
case drain hose/tube and let the fluid flow into the container.
R Pressure Relief Valve Hose/Tubes Figure 409/TASK 29-11-49-991-911
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R Pressure Relief Valve Hose/Tubes Figure 410/TASK 29-11-49-991-912
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NOTE : Use a second wrench to hold the fitting on the case drain tube
____ when you loosen the coupling nut on the pressure-relief valve tube.
(7) If not done before, disconnect the lower pressure-relief valve tube
(30) from the higher pressure-relief valve hose/tube (25).
NOTE : Use a second wrench to hold the lower pressure-relief valve
____
tube when you loosen the coupling nut on the higher
pressure-relief valve tube.
(8)
Remove the bolt (5), the washer (10), the nut (15) and the clamp (20) that attach the lower pressure-relief valve tube to the engine bracket at flange STA.199(A2).
(9)
Remove the bolt (5), the washer (10), the nut (15) and the clamp (20) that attach the lower pressure-relief valve tube to the engine bracket at flange STA.185(B5).
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