Pressurization System with the Left Engine 29-23-00-864-001 Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU 29-24-00-864-001 Depressurize the Yellow Hydraulic System R 71-13-00-010-040 Opening of the Fan Cowl Doors
71-13-00-410-040 Closing of the Fan Cowl Doors
R 78-36-00-010-040 Opening of the Thrust Reverser Doors
R 78-36-00-410-040 Closing of the Thrust Reverser Doors
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-14-49-991-001 Fig. 401
3. Job Set-up__________
Subtask 29-14-49-860-051
A. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized (Ref. TASK 29-23-00-864-001), (Ref. TASK 29-24-00-864-001) and (Ref. TASK 29-10-00-864-003).
(2) Make sure that the hydraulic reservoir is depressurized (Ref. TASK 29-14-00-614-001).
(3) Make sure that warning notice(s) is (are) in position to tell persons not to pressurize the hydraulic system: - on the ground service panel 198CB.
(4) Make sure that warning notice(s) is (are) in position on the access door 195BB to tell persons not to pressurize the hydraulic reservoir.
R Subtask 29-14-49-010-051-A
R B. Get Access
R (1) Make sure that the access platform is in position at the engine 1.
R R (2) Make sure that the left fan-cowl door 437AL is open (Ref. TASK 71-13-00-010-040).
R R (3) Make sure that the thrust reverser door 451AL is open (Ref. TASK 78-36-00-010-040).
Subtask 29-14-49-941-051
C. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU: - make sure that warning notice(s) is (are) in position to tell persons not to start the engine.
(2)
Make sure that the engine 1 shutdown occurred not less than 5 minutes
before you do this procedure.
(3)
Make sure that the warning notice(s) is (are) in position to tell persons not to pressurize the 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)
Make sure that the warning notice(s) is (are) in position to tell persons not to energize the FADEC 1(2).
4. Procedure
_________ (Ref. Fig. 401/TASK 29-14-49-991-001) Subtask 29-14-49-420-050
A. Installation of the Reservoir Pressurization Hose CAUTION : USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN
_______ YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU USE THE SECOND WRENCH, YOU WILL NOT LOOSEN OR TIGHTEN THE UNION TOO MUCH.
(1)
Clean the component interface and/or the adjacent area.
(2)
Do an inspection of the component interface and/or the adjacent area.
(3)
Remove the blanking plugs from the disconnected line ends.
(4)
Apply COMMON GREASE (Material No. 04-003) to all the hydraulic unions.
(5)
Connect the reservoir pressurization hose (4):
-
to the bleed pipe (3), turn the elbow so that you get an angle of 5 to 10 degrees (approx.) between the elbow axis and the longitudinal axis of the bleed pipe,
-
to the junction plate (1).
(6)
TORQUE the nuts (2) of the reservoir pressurization hose (4) to between 1.5 and 1.7 m.daN (11.06 and 12.53 lbf.ft).
(7)
Manually move the hose and make sure that there is a minimum clearance of approximately 25.4 mm (1.0000 in.) between the hose and the adjacent pipes. If the clearance is not correct, do the adjustment again.
Subtask 29-14-49-720-050
B. Test of the Reservoir Pressurization Hose
(1)
Do the functional test of the hydraulic reservoir pressurization system with the left engine (Ref. TASK 29-14-00-720-002)
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