(2)  
Access Panel
 1103 Forward Access Door

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 01 Page 401 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500MAINTENANCE MANUAL
SEE A
SEE  B 
MEMORY 
AUTOPILOT  DEVICE  1 
DISENGAGE 
SWITCH  A 
STABILIZER TRIM 
CONTROL SWITCH 

SEE C
MICROPHONE SWITCH AND TRIGGER ASSEMBLY
1
NOT ON ALL AIRPLANES MICROPHONE SWITCH WIRES
INTERPHONE SWITCH WIRES
CONTROL WHEEL HANDLE
A

Control Wheel Installation
Figure 401 (Sheet 1)

A
TERMINAL BLOCK
STABILIZER TRIM CONTROL SWITCH WIRE BUNDLE
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A

737-300/400/500MAINTENANCE MANUAL 
ASSEMBLY GEAR AND SLEEVE  ASSEMBLY AND WIRE BUNDLE CONTROL SWITCH STABILIZER TRIM  WASHER SPECIAL  PIN COTTER 
BOLT  NUT 
27 INCHES (APPROX) 
WIRE BUNDLE CLAMP 
WHEEL CONTROL 
HOUSING ASSEMBLY CONTROL COLUMN AND  MOUNTING BOLT (3 PLACES) 
A-A 

ACTUATOR TRIM AILERON 
SEE  C  MECHANISM TRIM B  FWD  FWD  INBD  PIN A/S-15 RIGGING 
C 
Figure 401 (Sheet 2) Control Wheel Installaion 

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 ALL  ú ú 01 Page 403 ú Jun 25/85
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 C. Procedure
 S 864-002
 (1)  
Do this task to depressurize hydraulic systems A and B: "Aileron Hydraulic Systems A and B Depressurization" (Ref 27-11-00/201).

 S 864-003

 (2)  
Move the aileron control wheels to the neutral position.

 S 014-004

 (3)  
Open the access door.

CABLE AB
AILERON CONTROL BUS DRUM
FWD

Control Wheel Installation
Figure 401 (Sheet 3)

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A
737-300/400/500MAINTENANCE MANUAL
 S 494-005
 (4)  
Install the rigging pins No. A/S-1 and A/S-1A in the transfer mechanism (Fig. 401).

 (a)  
Make sure the rigging pin A/S-1 is fully in the transfer mechanism.

 (b)  
Hold the rigging pin A/S-1 to make sure it does not fall out.

 S 494-006
 (5)
Install the rigging pin A/S-15 in the aileron trim mechanism.

 S 424-007

 (6)  
Remove the aileron control wheel:

 (a)  
Remove the cotter pin, retaining nut, and special washer.

 (b)  
Make a mark of the positions of the control wheel and gear and sleeve assembly.

 (c)  
Carefully remove the control wheel from the control column.

 (d)  
Do these steps while you hold the control wheel: 1) Make a mark of the wire bundle to identify the clamp

 location in the control wheel hub. 2) Remove the clamp. 3) Disconnect the four pairs of switch leads of the stabilizer
 trim at the terminal block. 4) Remove the retainer from the autopilot disengage switch. 5) Carefully pull the switch assembly from the control wheel. 6) Remove the two screws from the microphone switch and the
　
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