(a)  
You can measure the linear dimension as an alternative to a surface protractor, find the reference point on the spoiler trailing edge.

 (b)  
Subtract the spoiler to flap clearance from the distance you measure.

 S 862-055
 (3)  
Put the speed brake control lever in the FLIGHT position.

 S 222-056

 (4)
Make sure that the spoiler No. 5 or 8 is up 20 |0.50 degrees or

 19.28 |0.50 inches (490+/-12.7mm) plus the clearance between the spoiler and the flap.
 (a)  An optional procedure is to examine the distance the adjacent corners of spoilers No. 5 and 6 or 7 and 8 are not aligned. 1) Make sure the ground spoiler hydraulic valve is correctly
 adjusted (Ref 27-62-00/201). 2) Make sure the distance the adjacent spoilers are not aligned is less than 0.25 inch(6.35mm).
 S 822-120
 (5)  If the spoiler No. 5 or 8 is not in the tolerance, adjust the input arm rod:
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-61-04
 ALL  ú ú 08 Page 212 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 WARNING: DO NOT PUT A PART OF YOUR BODY BETWEEN THE SPOILER AND THE
_______ WING UNLESS THE SPOILER ACTUATOR IS LOCKED OR THE HYDRAULIC POWER IS RELEASED. THIS CAN CAUSE INJURY TO PERSONS.
 (a)  
Open the applicable access panel and extend the flaps or lift the spoilers to get access to the spoiler control package. 1) Install the spoiler actuator locks on the spoilers if you

 lifted the spoilers.

 (b)  
Adjust the input arm rod: 1) Loosen the two checknuts on the rod assembly. 2) Turn the adjustment rod until the spoiler is in the correct

 position. 3) Hand tighten the two checknuts. 4) Put the speed brake control lever in the DOWN position to
 lower the spoilers.
 (c)  
Make sure the clearance between the spoiler and the flap is in the tolerance.

 (d)  
Tighten the two checknuts on the rod assembly.

 S 082-060
 (6)  
Remove the surface protractor.

 I.
Put the Airplane Back to Its Usual Condition

 S 412-061
 (1)  
Close the access panel on the bottom surface of the wing.

 S 862-062

 (2)
Do this task to depressurize hydraulic systems No. 1 and 4: "Hydraulic System Depressurization" (AMM 29-11-00/201).

 S 612-063

 (3)  
Do this task: "Hydraulic Reservoir Servicing" (AMM 12-12-01/301).

 S 862-064

 (4)
Do this task: "Remove Electrical Power" (AMM 24-22-00/201).

 S 862-065

 (5)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

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

 TASK 27-61-04-002-066
 4. Filter Removal (Fig. 201)
______________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-61-04
 ALL  ú ú 04 Page 213 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B. Access
 (1)  
Location Zone
 575 Spoiler No. 5
 675 Spoiler No. 8

 (2)  
Access Panel
 572FB Trailing Edge Lower, LH
 672FB Trailing Edge Lower, RH

 C.
Procedure

 S 862-067
 WARNING: OPEN THE CIRCUIT BREAKERS TO PREVENT THE SPOILER RETRACTION.
_______ IF YOU USE THE SPEED BRAKE LEVER TO LIFT THE SPOILERS, AND IF YOU RELEASE THE PRESSURE IN SYSTEMS NO. 1 AND 4, THE SPOILERS WILL AUTOMATICALLY RETRACT. THIS CAN CAUSE INJURY TO PERSONS.
 (1)  
　
中國(guó)航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊(cè) 飛行操縱 FLIGHT CONTROLS 6(72)