(3)  
Apply the sealant to the countersunk part of the fasteners in the center of the track.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 CENTER OVERHEAD STOWAGE BIN SUPPORT TIE ROD - REMOVAL/INSTALLATION
__________________________________________________________________
 1.  General_______
 A. This procedure contains two tasks:
 (1)  
The removal of the center stowage bin tie rod supports.

 (2)  
The installation of the center stowage bin tie rod supports.

 B. You must remove the ceiling panels to gain access to the tie rods.
 TASK 53-45-01-024-001
 2.  Center Overhead Stowage Bin Support Tie Rod Removal (Fig. 401)___________________________________________________
 A. References
 (1)  AMM 25-22-01/401, Main Passenger Ceiling Panels
 B. Access
 (1)  Location Zone 200 Upper Half of Fuselage (Main and Upper Deck)
 C. Procedure
 S 024-003
 (1)
Make sure that the center overhead stowage bins are empty.

 S 024-004

 (2)  
Remove the ceiling panels (AMM 25-22-01/401) adjacent to the tie rod to be removed.

 S 024-005
 CAUTION: REMOVE AND INSTALL ONE TIE ROD AT A TIME ONLY.
_______
 (3)  
Loosen and remove the nut 3. and washer 4. from the bolt 5. on the lower end of the tie rod and truss ladder fitting in Fig. 401.

 (4)  
Remove the bolt 5. and washer 4. from the tie rod end and fitting.

 S 024-007

 (5)  
Loosen and remove the nut 3. and washer 4. from the bolt 5. on the top end of the tie rod on Fig. 401.

 (6)  
Remove the bolt 5. and washer 4. from the tie rod end and fitting.

 (7)  
Remove the tie rod.

 S 024-006
 S 024-008
 S 024-021
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 024-009
 (8)  Measure and make a record of the tie rod length between the tie rod end fitting holes as a reference for repair or replacement.
 NOTE: If the tie rod is bent or broken, this measurement is not
____
 necessary. Replace the tie rod.

 TASK 53-45-01-424-010
 3. Center Overhead Stowage Bin Support Tie Rod Installation (Fig. 401)
________________________________________________________
 A. References
 (1)  AMM 25-22-01/401, Main Passenger Ceiling Panels
 B. Access
 (1)  Location Zone 200 Upper Half of Fuselage (Main and Upper Deck)
 C. Procedure
 S 424-011
 (1)  
Measure the distance between the hole centerlines on the structure and the truss ladder stow bin support.

 S 424-012

 (2)  
Adjust the new tie rod equally on both ends to the length measured on the removed tie rod or the measured distance between the fitting hole in the structure and the fitting hole in the truss ladder.

 (a)  Make sure the threads are visible in the inspection holes in the tie rod tube.
 S 424-013
 (3)  Install the bolt 5. with washer 4. in the upper end of the tie rod end fitting and through the fitting hole in the structure. Install the washer 4. and nut 3. on the end of the bolt 5.
 NOTE: Make sure you tighten the nut 3. after the adjustment is
____
 complete.

 (a)  The collector cuff should be on the lower end of the tie rod.
 S 424-014
 (4) Put the lower end of the tie rod in the truss ladder fitting.
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