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747-400 MAINTENANCE MANUAL
 (j)  Put the aileron control wheel in the neutral position.
 S 725-103
 (2)  
Examine the operation of the spoilers in the FLIGHT position.

 (a)
Make sure that all spoilers are in the fully down position.

 (b)  
Put the speed brake lever in the FLIGHT position. 1) Make sure that spoilers No. 3, 4, 9 and 10 are in the fully up position (45 |1.5 degrees).

 2)  Make sure that spoilers No. 5 thru 8 are up 20 |1.5 degrees.

 (c)  
Turn the aileron control wheel 83 degrees clockwise from neutral. 1) Make sure that spoilers No. 1 thru 5 are in the fully down

 position. 2) Make sure that spoilers No. 6 thru 8 are at 20 |1.5 degrees. 3) Make sure that spoilers No. 9 thru 12 are in the fully up position (45 |1.5 degrees).

 (d)  
Turn the aileron control wheel 83 degrees counterclockwise from neutral. 1) Make sure that spoilers No. 1 thru 4 are full up (45 |1.5

 degrees). 2) Make sure that spoilers No. 5 thru 7 are at 20 |1.5 degrees. 3) Make sure that spoilers No. 8 thru 12 are in the fully down position.

 (e)  
Turn the aileron control wheel to neutral.

 S 725-105
 (3)  
Examine the spoiler operation with the speed brake lever in the UP position:

 (a)  
Put the speed brake lever in the UP position.

 (b)  
Put the aileron control wheel in the neutral position.

 (c)  
Make sure that spoilers No. 1 thru 12 are in the fully up position (45 |1.5 degrees).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 (d)  
Turn the aileron control wheel 83 degrees clockwise from neutral. 1) Make sure that spoilers No. 1 thru 5 are in the fully down

 position. 2) Make sure that spoilers No. 6 thru 12 are in the fully up position (45 |1.5 degrees).

 (e)  
Turn the aileron control wheel 83 degrees counterclockwise from neutral. 1) Make sure that spoilers No. 1 thru 7 are in the fully up

 position (45 |1.5 degrees). 2) Make sure that spoilers No. 8 thru 12 are in the fully down position.
 S 865-123
 (4)  
Turn the aileron control wheel to the neutral position.

 S 865-124

 (5)  
Put the speed brake lever in the DOWN position.

 F.
Put the Airplane Back to Its Usual Condition

 S 085-107
 (1)  
Remove the control wheel protractor and adapter from the captain's aileron control wheel.

 S 865-108

 (2)
Do this task: "Remove Hydraulic Power" (AMM 29-11-00/201).

 S 865-109

 (3)
Do this task: "Remove Electrical Power" (AMM 24-22-00/201).

 S 865-125

 (4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7G6, SPEED BRAKE AUTO CONT

 TASK 27-61-00-755-126
 5.  Spoiler Control System Friction Check (Fig. 506)_____________________________________
 A. Standard Tools and Equipment
 (1)  Spring Scale - 0 to 20 pounds capacity
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

 B. References
 (1)  
AMM 27-51-00/201, Trailing Edge Flap System

 (2)  
AMM 27-61-03/201, Spoiler Differential Mechanism

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
AIPC 27-61-03, Fig. 2

 C.
Access

 (1)  
Location Zone
 135 Wing Landing Gear Wheel Well LH
　
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