(i)  
Install the coupling bolts (14 and 17), washers (15), and nuts (16). 1) Tighten the nuts.

 (j)  
Attach the central control actuator link to the central control actuator. 1) Align the actuator and the input rod.

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747-400 MAINTENANCE MANUAL
 2) Install the bolt (4), the washer (5) and the nut (6). 3) Tighten the nut to 50 - 80 pound-inches. 4) Install the cotter pin.
 (k)  Attach the speed brake pushrod to the central control actuator link. 1) Align the pushrod and the actuator link. 2) Install the bolt (4), washer (5), and nut (6). 3) Tighten the nut to 50 -80 pound-inches. 4) Install a cotter pin.
 S 642-009
 (3)
Do this task to lubricate the spoiler differential mechanism: "Spoiler Control System Lubrication" (Ref 12-21-21/301).

 S 722-010

 (4)  
Do this task: "Functional Test - Spoiler Differential Mechanism" (Ref Paragraph 5).

 S 092-011
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK 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.
 (5)  Do this task: "Removal of the Door Locks from the Wing Landing Gear" (Ref 32-00-30/201).
 TASK 27-61-03-722-014
 4. Functional Test - Spoiler Differential Mechanism
________________________________________________
 A. References
 (1)  
24-22-00/201, Manual Control

 (2)  
29-11-00/201, Main Hydraulic Supply System

 B.
Access

 (1)  
Location Zone
 585 Spoiler No. 1
 584 Spoiler No. 2
 583 Spoiler No. 3
 582 Spoiler No. 4
 575 Spoiler No. 5
 574 Spoiler No. 6
 674 Spoiler No. 7
 675 Spoiler No. 8
 682 Spoiler No. 9
 683 Spoiler No. 10
 684 Spoiler No. 11
 685 Spoiler No. 12

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747-400 MAINTENANCE MANUAL
 C.  Procedure
 S 862-015
 (1)  
Do this task: "Supply Electrical Power" (Ref 24-22-00/201).

 S 862-016

 (2)  
Make sure these circuit breakers are closed:

 (a)  
P180 DC Power Distribution Panel
 1) 180H7 LATERAL CONT VLV SYS 1
 2) 180E6 LATERAL CONT VLV SYS 2
 3) 180H23 LATERAL CONT VLV SYS 3
 4) 180E22 LATERAL CONT VLV SYS 4

 S 862-017
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (3)  
Do this task to pressurize hydraulic systems No. 2 and 3:
 "Hydraulic System Pressurization" (Ref 29-11-00/201).

 S 722-018

 (4)  
Do a test of the operation of the spoiler differential mechanism with the aileron control wheel (Fig. 201):

 (a)  
Put the aileron control wheel in the neutral position as shown by the trim indicator decal on the control wheel.

 (b)  
Put the speed brake control lever in the DOWN position.

 (c)  
Turn the captain's aileron control wheel to the full counterclockwise position.

 (d)  
Make sure that the spoiler No.3 is up 30.80 |0.98 inches (782+/-24.9mm) (45.0+/-1.5 degrees). If you measure the linear dimension: 1) Find the reference point on the spoiler trailing edge at
　
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