NOTE: Do this task to install the right CDU.
____
 (h)  Do the following alternate steps to install the control module without the removal of the control display unit: 1) Make sure the control handle is in the "OFF" position. 2) Attach a thin string (2 to 3 ft long) to the end of the
 control rod. 3) Insert the other end of the string through the hole in the handle swivel joint of the module to be installed.
 4)  Use the string to help the control rod into the swivel joint of the handle trunnion while you push the module into its position.
 NOTE: The alignment pin helps electrical connectors D12461
____ and D12462 into their position. The connectors make a connection when you push the module into its position.
 5) Remove the string.
 6) Install the nut that attaches the rod to the handle

 trunnion. 7) Tighten the nut while you hold the rod with a screwdriver. 8) Tighten the nut to 30-50 lb-inches torque.
 (i)  
Make sure the control handle is in the OFF position.

 (j)  
Make sure the rigging pins in the two selector valve quadrants are free for removal.

 (k)  
Attach the control module case to the structure with the attach screws.

 (l)  
Install the face plate on the module with nylon washers and screws.

 S 094-019
 (3)  
Remove rigging pin LG-1 from the selector valve quadrant of the wing landing gear.

 S 094-032

 (4)  
Remove rigging pin LG-2 from the selector valve quadrant for the nose landing gear and the body landing gear.

 F.  
Do a Check of the Control Handle Module.

 S 714-124
 (1)  
Do the steps that follow to make sure the control lever module is installed correctly:

 (a)  
Move the lever into and out of all detents. The lever must move smoothly with no interference, scraping or binding. When you release the lever at each detent, it must go into the detent without using any extra force.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL

 (b)  With the lever in the extended position, push the lock override button and move the lever through its full travel. The lever must move smoothly with no interference, scraping or binding. When you release the button, it should return to the fully extended position with no interference, scraping or binding.
 S 094-043
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO REMOVE
_______ THE DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  
Do this task: "Removal of the Door Locks from the Doors for the Wing Landing Gear" (AMM 32-00-30/201).

 S 094-039

 (3)  
Do this task: "Removal of the Door Locks from the Doors for the Body Landing Gear" (AMM 32-00-30/201).

 S 094-038

 (4)  
Do this task: "Removal of the Door Locks from the Doors for the Nose Landing Gear" (AMM 32-00-30/201).

 S 864-022

 (5)  
Move the control handle to the DN position.

 S 864-023

 (6)  
Supply electrical power (AMM 24-22-00/201).

 S 864-032

 (7)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P6, Main Power Distribution Panel
 1) 6C28, ALT LG EXT NOSE
 2) 6C29, ALT LG EXT WING L
 3) 6C30, ALT LG EXT WING R
 4) 6C31, ALT LG EXT BODY L
 5) 6C32, ALT LG EXT BODY R

 (b)  
P7, Overhead Circuit Breaker Panel
 1) 7F22, LANDING GEAR DSP & CONT ALT
 2) 7F23, LANDING GEAR DSP & CONT PRI
 3) 7F24, LANDING GEAR LEVER LOCK

 S 724-044
 WARNING: MAKE SURE YOU INSTALL THE GROUND LOCKS BEFORE YOU MOVE THE
_______ CONTROL LEVER. THE LANDING GEAR CAN MOVE IF YOU DO NOT INSTALL THE GROUND LOCKS. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
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