C.  
Prepare to do the the repair of the Aux Track Beam.

 S 018-031-N00
 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO MANUALLY EXTEND
_______ THE THRUST REVERSER SLEEVE. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)
Manually extend the thrust reverser sleeve (AMM 78-31-00/201).

 S 358-032-N00

 (2)
On the thrust reverser auxiliary track, do these steps:

 (a) Break sharp edges of the worn areas.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)  
Clean per SOPM 20-30-03, and alodine finish the worn areas of the auxiliary track.

 (c)  
Install a new Aux Track Liner (AMM 78-31-11/401).

 (d)  
Fill in worn areas of the aux track beam. 1) Inject BMS5-28, type 25 or type 6 potting compound under

 the outside edge of the aux track liner.
 2) Remove the excess potting before it becomes hard.

 (e)  
Remove primer coating from aux track beam flange area to allow for installation of retainer assembly.

 (f)  
Chamfer edges of slider to ensure smooth contact between slider and retainer.

 (g)  
Put the slider in its position at one end of the track. Shim the slider against track as shown in Fig. 801 until contact is made between slider and the lip of the aux track beam channel.

 NOTE: Be sure the potting compound under the track liner
____
 is dry before installing slider.

 (h)  
Align the retainer assembly (PN: 315T4405) flush with the forward end of the aux track liner.

 (i)  
Clamp the retainer assembly in position with 0.05 in. clearance from positioned slider.

 (j)  
Move the slider to the other end of the track. Shim the slider against track as shown in Fig. 801 until contact is made between slider and the lip of the aux track beam channel.

 (k)  
Clamp the retainer assembly in position with 0.05 in. clearance from positioned slider.

 NOTE: Both ends of the retainer assembly must have a
____ 0.05 in. clearance on the slider.
 (l)  
Drill holes (0.164/0.168 in. dia.) through retainer assembly pilot holes and structure (Fig. 802). 1) Debur holes (SOPM 20-10-02).

 (m)  
Install temporary fasteners.

 (n)  
Mark the retainer where existing fasteners were removed from the structure. 1) Remove temporary fasteners.

 (o)  
Drill pilot holes where you marked the retainer assembly for existing holes.

 (p)  
Drill pilot holes in retainer for the remaining locations.

 (q)  
Install the retainer assembly with temporary fasteners.

 (r)  
Drill holes (0.164/0.168 in. dia.) through retainer assembly pilot holes and structure (Fig. 802). 1) Debur holes (SOPM 20-10-02).

 (s)  
Remove the retainer assembly.

 (t)  
Counter bore each of the holes in the retainer assembly. 1) Diameter = 0.50 - 0.52 in. 2) Depth = 0.39 in. 3) Fillet radius = 0.032 - 0.062 in.

 (u)  
Epoxy prime any exposed reworked parent material.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FWD  A 
A  TRACK BEAM 
UPPER LEFT RETAINER SHOWN (UPPER RIGHT OPPOSITE)  SLIDER  LINER 
SHIM 
MAXIMUM 0.05 INCH 
LETTER CODE  D  N = NEAR SIDE HEAD LOCATION (OPTIONAL) F = FAR SIDE (OPTIONAL) DIAMETER FASTENER 7 6F  A-A  RETAINER ASSEMBLY 
FASTENER (OPTIONAL) LENGTH/GRIP 
EXAMPLE OF FASTENER SYMBOL 
　
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