(1)
 Make a detailed inspection of the centering pins.

 (2)
 Make sure that the dimensions of the pins are correct.

 Lower Fairing Inspection.
 Figure 601/TASK 54-56-00-991-004
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 -------------------------------------------------------------------------------| FIG. | ORIGINAL MANUFACTURING LIMITS | IN-SERVICE WEAR LIMITS | | DETAIL |---------------------------------------|----------------------------| | AND | DIMENSION | ASSEMBLY CLEARANCE| DIMENSION LIMITS | MAX. | | ITEM | IN. (MM) | IN. (MM) | IN. (MM) | ALLOW. | | NO. |-------------------|-------------------|---------|---------| CLEAR. | | | MIN. | MAX. | MIN. | MAX. | MIN. | MAX. |IN. (MM)| |--------|---------|---------|---------|---------|---------|---------|--------| | A | 0.3098 | 0.3118 | | | 0.3085 | | | | OD 1 | (7.868) | (7.919) | | | (7.835) | | | | | | | 0.0002 | 0.0027 | | | 0.0054| | | | | (0.005) | (0.068) | | |(0.137) | | A | 0.3120 | 0.3125 | | | | 0.3139 | | | ID 2 | (7.924) | (7.937) | | | | (7.973) | | -------------------------------------------------------------------------------
5. Close-up
________
 Subtask 54-56-00-410-051
 A. Installation of Components
 (1) Install these panels:
 (a)
 For the left pylon: 473AL, 473AR

 (b)
 For the right pylon: 483AL, 483AR

 Subtask 54-56-00-942-051
 B. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Remove the warning notice(s).

 (3)
 Remove the access platform(s).

 PYLON-TO-NACELLE JUNCTION - DESCRIPTION AND OPERATION
_____________________________________________________
 1. Description___________
 (Ref. Fig. 001, 002) 
R  The pylon-to-nacelle junction is made of:
 - two aprons
 - a transition fairing
 - a front radial firewall
 - rear radial firewall 
R  - fan-cowl hinge fittings at RIB01, RIB03 and RIB05 
R  - fan thrust-reverser cowl hinge fittings. 
R  These junction items are made of stainless steel. 
R  Monel rivets and corrosion-resistant steel bolts are used for attachment.

 Pylon-to-Nacelle Junction
 Figure 001
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 Engine Cowl Hinge Fittings
 Figure 002
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 FITTINGS - REMOVAL/INSTALLATION
_______________________________ TASK 54-57-17-000-001 R Removal of the Fittings at RIB1
 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 1.5 m (4 ft. 11 in.)

 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
 78-36-00-010-040 Opening of the Thrust Reverser Doors
 54-57-17-991-001 Fig. 401

 3. Job Set-up
__________
 Subtask 54-57-17-941-050

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