-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
**ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
 54-51-21-991-001 Fig. 401 R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
 54-51-21-991-001-A Fig. 401A
 **ON A/C ALL

 3. Job Set-up
__________
 Subtask 54-51-21-860-050

 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001).

 (2)
 Make sure that an access platform is in position.

 (3) Make sure that the warning notice is in position.
 Subtask 54-51-21-040-051

 B. Deactivation of the Thrust Reverser WARNING : MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE
_______ THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.
 (1) Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).

 Subtask 54-51-21-110-050

 C. Preparation for the Installation
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do a visual inspection of the component interface and/or the adjacent area.

 4. Procedure
_________ R **ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
 Subtask 54-51-21-420-050
 A. Installation of the Pylon Lateral Access-Doors
 (Ref. Fig. 401/TASK 54-51-21-991-001)

 (1) Install the pylon lateral access-door 415BL. NOTE : The procedure is the same for the pylon lateral access-doors
____
 415BR, 425BL and 425BR.

 (a)
 Put the access-door (1) in position and install the washers (2) and the screws (3).

 (b)
 TORQUE the screws (3) to between 0.82 and 1.06 m.daN (72.56 and

 93.80 lbf.in).
 (2) Install the pylon lateral access-door 415AL. NOTE : The procedure is the same for the pylon lateral access-doors
____
 415AR, 425AL and 425AR.

 (a)
 Put the access-door (5) in position and install the screws (4).

 (b)
 TORQUE the screws (4) to between 0.82 and 1.06 m.daN (72.56 and

 93.80 lbf.in).

R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
 Subtask 54-51-21-420-050-A
 A. Installation of the Pylon Lateral Access-Doors
 (Ref. Fig. 401A/TASK 54-51-21-991-001-A)

 (1) Install the pylon lateral access-door 415BL. NOTE : The procedure is the same for the pylon lateral access-doors
____
 415BR, 425BL and 425BR.

 (a)
 Put the access-door (3) in position and install the washers (2) and the screws (1).

 (b)
 TORQUE the screws (1) to between 0.82 and 1.06 m.daN (72.56 and

 93.80 lbf.in).

 (c)
 Install the washer (4), the captive screw (6) and the spring pin (5).

 (d)
 TORQUE the captive screws (6) to between 1.79 and 2.24 m.daN

 (13.20 and 16.51 lbf.ft) .
 (2) Install the pylon lateral access-door 415AL. NOTE : The procedure is the same for the pylon lateral access-doors
____
 415AR, 425AL and 425AR.

 (a)
 Put the access-door (8) in position and install the screws (7).

 (b)
 TORQUE the screws (7) to between 0.82 and 1.06 m.daN (72.56 and

 93.80 lbf.in).
 **ON A/C ALL

 5. Close-up
________
 Subtask 54-51-21-440-050

 A. Aircraft Maintenance Configuration
 (1) Make the thrust reverser serviceable after maintenance (Ref. TASK 78-30-00-081-041).

 Subtask 54-51-21-862-050

 B. De-energize the ground service network
 (Ref. TASK 24-42-00-862-001).

 Subtask 54-51-21-410-050
 C. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Remove the access platform(s).

 (3)
 Remove the warning notice(s).

 MISCELLANEOUS - REMOVAL/INSTALLATION
____________________________________ TASK 54-51-29-000-001 Removal of the Hoisting Fitting WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
 START A TASK ON OR NEAR:

 -
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES

 -
THE LANDING GEAR AND THE RELATED DOORS

 -COMPONENTS THAT MOVE.
 WARNING : MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT
　
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