Removal of the Head Supply Pipe of the Left Actuator
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.
1. Reason for the Job
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Self Explanatory
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific container 1 USgal (4 L)
No specific protective covers
No specific warning notice
No specific access platform 1 m (3 ft. 3 in.)
No specific Torque Wrench : range 96.00 to 900.00 lbf.in
(1.00 to 10.00 m.daN)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP2245 *
finish paint EA4 blue 5991 (Ref. 70-30-00)
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C. Referenced Information
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REFERENCE DESIGNATION
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71-13-00-010-040 Opening of the Fan Cowl Doors
78-30-00-481-041 Make the Thrust Reverser Unserviceable for
Maintenance
78-31-49-991-311 Fig. 410
3. Job Set-up
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Subtask 78-31-49-941-084
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 78-31-49-010-118
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 the access platform in position.
Subtask 78-31-49-040-110
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
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(Ref. Fig. 410/TASK 78-31-49-991-311) Subtask 78-31-49-020-082
A. Removal of the Head Supply Pipe of the Left Actuator
(1) Put a container 1 USgal (4 L) under the lower hydraulic actuator.
(2) Disconnect the head supply hose from the actuator and let the hydraulic fluid drain into the container.
(3) Connect the 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).
NOTE : Apply a witness line of finish paint EA4 blue 5991 (Material
____ No. CP2245) on the nut and connection after they are torqued.
(5) Remove the nuts and the bolts that attach the flange and the upper half clamp to the upper hydraulic line bracket.
(6) Remove the nut, the clamp, the washer and the bolt from the two half clamps which attach the electrical harness to the rod supply pipe.
(7) Disconnect the interface hydraulic hose from the head supply pipe.
(8) Remove the nut that attach the head supply pipe to the interface bracket.
(9) Disconnect the head supply pipe from the middle hydraulic line bracket.
(10) Remove the head supply pipe from the forward frame.
(11) Put protective covers on the pipe ends.
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