27-31-71
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A
737-300/400/500MAINTENANCE MANUAL
OUTPUT TORQUE TUBE
ELEVATOR 
BUS CRANK 
ELEVATOR 
CONTROL 
PUSHROD 
FWD 
RIG PIN E-5 
ELEVATOR 
AFT CONTROL 
SEE  A  QUADRANT 

INDEX
MARK

ELEVATOR
TAILCONE  FWD
A

Elevator Input Torque Tube Adjustment
Figure 402

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737-300/400/500MAINTENANCE MANUAL
 (2)  
Access Panels
 3701 Stabilizer Trim Access Door

 E.
Procedure

 S 864-002
 (1)  
Do this task: "Remove Elevator Hydraulic Systems A and B"
 (Ref 27-31-00/201).

 S 014-008

 (2)  
Open the access door 3701 (Ref 12-31-41/201).

 S 014-003

 (3)  
If it is necessary, remove the tail cone:

 NOTE: The removal of the tail cone is not necessary, but it gives
____ better access for the removal of the torque tube.
 (a)  
If you remove the tail cone: Make marks on the airplane to show the tail cone locations for correct installation of the tail cone.

 (b)  
Remove the tail cone (Ref 53-53-00/401).

 S 864-007
 (4)  
Set the horizontal stabilizer at 3 units of trim.

 S 494-005

 (5)
Install the rig pin E-5 in the aft control quadrant (Fig. 401).

 S 014-006

 (6)  
Remove the EAL, EBL, EAR, and EBR control cables (5) from the quadrants on the torque tube:

 (a)  
Install the clamps on the cables so the cables will not go through the aft pressure bulkhead.

 (b)  
Remove the turnbuckle locking clips.

 (c)  
Loosen the turnbuckles for the elevator cables EAL, EBL, EAR, and EBR.

 (d)  
Remove the control cables (5).

 S 024-004
 (7)  
Remove the torque tube:

 (a)  
Disconnect the autopilot sensor rod (13) at the aft end.

 (b)  
Disconnect the autopilot actuator rod (12) at the lower rod end.

 (c)  
Disconnect the input rods (10) of the power control units at the lower rod ends.

 (d)  
Disconnect the output rod of the feel and centering unit (1) at the lower rod end.

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737-300/400/500MAINTENANCE MANUAL
 (e)  Use the drill bit 0.187/0.190 and the drill centering guide, to drill out 4 BACB30GW lockbolts (11).
 NOTE: Be careful to make sure the holes are not out of
____
 tolerance.

 (f)  
Remove the rig pin E-5.

 (g)  
Remove the 4 quadrant mounting bolts (7), (8), (9), and (14) from the left and the right side plate assemblies.

 (h)  
Remove and keep the bushings (15).

 NOTE: When the mounting bolt (7) and (8) are removed, the
____ lower attachment of the power control unit will be loose.
 (i)  Remove the torque tube from the airplane.
 TASK 27-31-71-404-009
 3. Elevator Input Torque Tube Installation
_______________________________________
 A. Special Tools and Equipment
 (1)  
Rig Pins (E-1, E-4 and E-5) - 0.309 +0.002/-0.000 inch diameter, 6.7 |0.25 inches long (MS20392-4)

 (2)  
Rig Pins (E-2 and E-3) - 0.4941 |0.0004 inch diameter, 4.5 |0.25 inches long (MS20392-7)

 NOTE: The rig pins are part of the kit F70207-69, -78 or -83.
____
 (3)  
F80055-1 - Trammel Bar

 B.
　
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