1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 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.)
 HIX3005 1 SAFETY SLEEVE - PIVOTING DOOR ACTUATOR

 B. Referenced Information
 -------------------------------------------------------------------------------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 78-32-41-480-001 Installation of the Safety Sleeve on Blocker Door
 Actuator
 78-32-41-860-001 Manual Deployment of the Blocker Door
 78-31-49-991-323 Fig. 422
 78-31-49-991-324 Fig. 423

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 3. Job Set-up
__________ Subtask 78-31-49-941-097
 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 78-31-49-010-134
 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 78-31-49-040-122
 C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
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 (Ref. Fig. 422/TASK 78-31-49-991-323, 423/TASK 78-31-49-991-324) Subtask 78-31-49-020-094
 A. Removal of the Interface Bracket, HCU Bracket and Hydraulic Line Middle Bracket:
 (1) Removal of the HCU bracket:

 (a) Remove the nut, the bolt and the clamp that attach the electrical harness to the HCU bracket. (Ref. Fig. 422/TASK 78-31-49-991-323)

 (b) Put the container 1 USgal (4 L) under the HCU bracket to catch the drained fluid.

 (c) Disconnect the interface hydraulic hoses from the HCU bracket and let the hydraulic fluid drain into the container.

 (d) Disconnect the actuator rod and the actuator head supply pipes from the HCU bracket.

 (e) Disconnect the supply pipe of the lower blocker door from the HCU bracket.

 (f) Remove the bolts that attach the bracket to the hydraulic control unit.

 (g) Remove the HCU bracket from the forward frame.

 (2) Removal of the interface bracket:

 (a) Remove the nut, the bolt and the clamp that attach the electrical harness to the HCU bracket. (Ref. Fig. 423/TASK 78-31-49-991-324)

 (b) Put the container under the interface bracket to catch the drained fluid.

 (c) Disconnect the interface hydraulic hoses from the interface bracket and let the hydraulic fluid drain into the container.

 (d) Disconnect the rod and the head supply pipes from the interface bracket.

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 Hydraulic Control Unit (HCU) Bracket
 Figure 422/TASK 78-31-49-991-323

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 Interface and Middle Brackets
 Figure 423/TASK 78-31-49-991-324

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 (e) Disconnect the left latch return pipe and the upper left latch supply pipes from the interface bracket.
　
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