NOTE: Count the ceiling panels from the forward end of the main
____
 main deck compartment.

 S 494-007
 (5)  
Install rig pin A/S-1 in the aileron control load limiter.

 F.
Remove the Aileron Control Wheel (Fig. 401)

 S 024-010
 (1)  
Remove the aileron control wheel.

 (a)  
Push the clip (10) to open the approach plate cover.

 (b)  
Remove nuts (12) and washers (11) that attach the approach plate (13) to the medallion (15).

 (c)  
Remove the approach plate (13) from the medallion (15).

 (d)  
Remove screws (14) that attach the medallion (15) to the control wheel (1).

 (e)  
Remove the medallion (15) from the control wheel (1).

 (f)  
Remove the cotter pin (9), wheel retaining nut (8), and special washer (7).

 (g)  
Make a mark of the positions of the control wheel (1) and of gear and sleeve (6).

 (h)  
Carefully remove the control wheel (1) from the control column.

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747-400 MAINTENANCE MANUAL
 S 864-035
 (2)  
Hold the control wheel while you do the subsequent steps:

 (a)  
Use an extraction tool to make a mark on the wire bundle to identify the clamp location in the control wheel hub.

 (b)  
Remove the clamp.

 (c)  
Use the extraction tool to disconnect five pairs of stabilizer trim switch leads at the terminal block (4).

 (d)  
Disconnect six pairs of autopilot disengage switch leads at the terminal block (4).

 (e)  
Remove the two screws (29) which hold the microphone switch and trigger assembly (24).

 (f)  
Carefully pull the assembly from the control wheel (1).

 NOTE: The installed radio transmit switch is part of this
____
 assembly.

 (g)  
Make a note of the configuration of the color wires.

 (h)  
Make a mark of these configurations.

 (i)  
Remove screws (17) and washers (18) to disconnect wires from terminals of stabilizer trim (30), autopilot disengage (27), microphone (23), and radio transmit switches (Fig. 402).

 (j)  
Remove bolts (20) and washers (19) which hold the terminal block cover (2) to the terminal block (4).

 (k)  
Carefully disengage the wire bundle (5) from the control wheel.

 TASK 27-11-03-404-011
 3. Aileron Control Wheel Installation
__________________________________
 A. Standard Tools and Equipment
 (1)  
Insulation Tester (100 megohms minimum) - Biddle Major Megger Tester, James G. Biddle Co., Plymouth Meeting, Pennsylvania 19462

 B.
Special Tools and Equipment

 (1)  
G12001-50 Rig Pin Kit

 (2)  
4MIT65B80307-1 Protractor (Recommended)

 (3)  
F52485-500 Protractor (Alternative).

 (4)  
3MIT65B80307-1 Control Wheel Adapter

 (5)  
M15570-20 Wire Extraction Tool, The Deutsch Co., 7001 West Imperial Highway, Los Angeles, California 90045

 C.
Consumable Materials

 (1)  
A00607 Dow Corning Compound No. 5

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A
747-400
MAINTENANCE MANUAL

 D. References
 (1)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (2)  
IPC 27-31-04-03, Control Column and Torque Tube Installation

 (3)  
IPC 27-41-11-01, Wheel Assembly

 (4)  
OHM 27-09-51, Aileron and Elevator Control Wheel and Column Assembly

 (5)  
OHM 27-11-21, Control Column Wheel Assembly

 E.
Access
　
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