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Subtask 78-31-51-210-052
G. Examine the Filter Clogging Indicator on the HCU
(1) If the red end of the indicator is extended, set it to the operational position, as follows:
(a) Remove the retaining ring and the glass bowl from the HCU.
(b) Push the red indicator in to set the normal (operational) position.
(c) Install the glass bowl and the retaining ring.
(d) Safety the retaining ring with lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8002).
(2) Do one more deploy-to-stow cycle of the thrust reverser.
(3) Make sure that the clogging indicator on the HCU is in the operational position.
Subtask 78-31-51-710-050
H. Do an operational test of the thrust reverser system (Ref. TASK 78-31-00-710-042).
5. Close-up
________
Subtask 78-31-51-410-052
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close fan cowl doors (Ref. TASK 71-13-00-410-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(3) Remove the access platform(s).
(4) Remove the warning notice(s).
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CONTROL UNIT - HYDRAULIC (4101KS) - REMOVAL/INSTALLATION
________________________________________________________ TASK 78-31-51-000-042 Removal of the Hydraulic Control Unit 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 cover
No specific drain can
No specific protective caps
No specific protective plugs
No specific softnose pliers
No specific warning notice
No specific access platform 1 m (3 ft. 3 in.)
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B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 71-13-00-010-040 Opening of the Fan Cowl Doors 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
Maintenance 78-36-00-010-040 Opening of the Thrust Reverser Doors 78-31-51-991-301 Fig. 401 78-31-51-991-303 Fig. 402
3. Job Set-up
__________
Subtask 78-31-51-941-051
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 78-31-51-010-052
B. Get Access
(1) Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
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