(7) Disconnect the interface hydraulic hose from the latch return pipe.

 (8) Remove the nut that attach the latch return pipe to the interface bracket.

 (9) Remove the latch return pipe from the forward frame.

 (10) Put protective covers on the pipe ends.
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 Return Pipe of the Left Latch
 Figure 401/TASK 78-31-49-991-300- 12 (SHEET 1)
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 Return Pipe of the Left Latch
 Figure 401/TASK 78-31-49-991-300- 22 (SHEET 2)
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 TASK 78-31-49-400-041

 Installation of the Return Pipe of the Left Latch
 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
__________________
 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.) R No specific Torque Wrench : range 5.00 to 35.00 lbf.in R (0.05 to 0.40 m.daN)
 No specific  Torque Wrench : range 36.00 to 220.00 lbf.in
 (0.40 to 2.60 m.daN)
 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

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 78-30-00-081-041 Make the Thrust Reverser Serviceable after
 Maintenance 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
 Maintenance 78-30-00-710-040 Thrust Reverser Hydraulic System Bleed Procedure 78-31-49-991-300 Fig. 401
 3. Job Set-up
__________
 Subtask 78-31-49-860-081
 A. Aircraft Maintenance Configuration
 (1) On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.

 (2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).

 (3) Make sure that the access platform is in position.

 Subtask 78-31-49-010-139
 B. Make sure that the fan cowl doors are open: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
 Subtask 78-31-49-040-126
 C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
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 (Ref. Fig. 401/TASK 78-31-49-991-300) Subtask 78-31-49-420-073
 A. Installation of the Return Pipe of the Left Latch
 (1) Remove the protective covers from the pipe ends.