S 034-025

 (15)
 Disconnect the grounding strap from the torque box.

 S 034-026

 (16)
 Hold the torque box while you remove the fasteners on the torque box.

 S 034-027

 (17)
 Remove the two support link rod assemblies.

 S 034-028

 (18)
 Remove the two top and the two bottom fasteners.

 S 024-029

 (19)
 Turn the torque box assembly counterclockwise 180° about a vertical axis.

 S 024-030

 (20)
 Lower the torque box through the access door, 313AL (Ref 06-42-00).

 TASK 27-31-16-424-062
 3. Install the Torque Box
______________________
 A. Consumable Materials
 (1)  
C00308 Corrosion Preventive Compound,
 MIL-C-11796

 B.
References

 (1)
06-42-00/201, Empennage Access Doors and Panels

 (2)
22-12-01/401, Autopilot Pitch Control Servo

 (3)
24-22-00/201, Electrical Power - Control

 (4)
27-00-01/201, Flight Control Cables

 (5)
27-31-00/501, Elevator Control System

 (6)
27-31-15/401, Elevator Aft Quadrants

 (7)
27-31-17/201, Elevator Feel Unit

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 27-31-16
 ALL  ú ú 02 Page 408 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (8)  
27-31-21/401, Neutral Shift and Override Mechanism

 C.
Access

 (1)  
Location Zones
 211/212 Control Cabin
 311/312 Area Aft of Pressure Bulkhead to BS 1787.45
 313/314 Stabilizer Center Section Compartment

 (2)  
Access Panels
 311AL Forward Stabilizer Compartment
 313AL Elevator Aft Quadrants

 D.
Install the Torque Box

 S 214-031
 (1)  
Make sure the new torque box is turned counterclockwise 180° about a vertical axis from its fully installed position.

 S 424-032

 (2)  
Lift the new torque box through the access door, 313AL
 (Ref 06-42-00).

 S 424-033

 (3)  
When the torque box is in the correct vertical position adjacent to the bulkhead, do the step that follows:

 (a)  
Turn the torque box clockwise 180° about a vertical axis and align it with the four bulkhead fastener locations.

 S 624-034
 (4)  
Apply a layer of corrosion preventive compound to the two top and the two bottom fasteners.

 S 434-035

 (5)  
Install the two bottom and the two top fasteners (Fig. 403).

 S 624-037

 (6)  
Apply a layer of corrosion preventive compound to the fasteners for the support link rod assemblies.

 S 434-036
 CAUTION: MAKE SURE THE O-RINGS ARE INSTALLED IN THE TOP SUPPORT LINK ROD
_______ ASSEMBLY. O-RINGS WILL HELP PREVENT CORROSION AND NOT LET THE BOLTS RUB AGAINST THE AIRPLANE STRUCTURE. DAMAGE TO THE AIRPLANE CAN OCCUR IF THE O-RINGS ARE NOT INSTALLED.
 (7)  Install the two support link rod assemblies.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-16
 ALL  ú ú 02 Page 409 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (8)  S 434-038Install the captain's aft quadrant (Ref 27-31-15).
 (9)  S 434-039Install the aft quadrant indexer.
 S 434-040

 (10)
 Install the first officer's aft quadrant (Ref 27-31-15) (Fig. 402).

 S 434-041

 (11)
 Install the neutral shift and override mechanism (Ref 27-31-21).

 S 434-042

 (12)
 Install the elevator feel unit (Ref 27-31-17).

 S 434-043

 (13)
 Install the APCS hydraulic lines, if you removed them for access.

 S 434-044

 (14)
 Install the APCS on the torque box assembly (3 locations) (Ref 22-12-01).
　
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