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 C. Referenced Information
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REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors
 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
 Maintenance
 78-31-49-991-322 Fig. 421

 3. Job Set-up
__________
 Subtask 78-31-49-941-096

 A. Safety Precautions
 (1) On the center pedestal, on the ENG panel 115VU:

 (a) Put a warning notice 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) On the overhead maintenance panel 50VU:

 (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

 (b) Put a warning notice to tell persons not to energize the FADEC 1(2).

 Subtask 78-31-49-010-133
 B. Get Access
 (1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 (2) Put a access platform in position.
 Subtask 78-31-49-040-121

 C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
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 (Ref. Fig. 421/TASK 78-31-49-991-322) Subtask 78-31-49-020-093
 A. Removal of the Lower Swivel Joints
 (1) Put a container 1 USgal (4 L) under the lower hydraulic actuator.

 (2) Disconnect the lower rod or the lower head supply hose from the actuator and let the hydraulic fluid drain into the container.

 (3) Connect the lower head supply hose to the actuator.

 (4) TORQUE the coupling nut to between 235 and 260 lbf.in (2.65 and 2.93 m.daN).

 (5) Connect the lower rod supply hose to the actuator.

 (6) TORQUE the coupling nut to between 130 and 150 lbf.in (1.46 and 1.69 m.daN).

 (7) Remove the bolts and the nuts that attach the lower head shield to the forward frame.

 (8) Remove the lower head shield from the forward frame.

 (9) Disconnect the lower head or the lower rod supply hose from the swivel joint.

 (10) Disconnect the head supply or the rod supply junction pipe from the swivel joint.

 (11) Put protective covers on the hose and pipe ends. NOTE : Apply a witness line of finish paint EA4 blue 5991 (Material

____ No. CP2245) on all nuts and connections after they are torqued.
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 Lower Swivel Joints
 Figure 421/TASK 78-31-49-991-322

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 TASK 78-31-49-400-006

 Installation of the Lower Swivel Joints
 WARNING : WEAR A FACE SHIELD WHICH IS RESISTANT TO HIGH PRESSURE JETS WHEN YOU
_______
 WORK ON PRESSURIZED SYSTEMS.

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.
 CAUTION : USE 2 WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS.
_______
 ONE WRENCH TO HOLD THE UNION AND ONE TO LOOSEN OR TIGHTEN THE
 COUPLING NUT. THIS WILL PREVENT DAMAGE TO THE HARDWARE.

 CAUTION : MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND ORIFICES OR
_______
 DAMAGE CAN OCCUR.

 CAUTION : YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.
_______
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
 No specific access platform 1 m (3 ft. 3 in.)
 No specific Torque Wrench : range 36.00 to 220.00 lbf.in
　
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