(k)  
Make sure the clearance at the nearest point between the spoiler and the flap is in the tolerance. There is no specified maximum clearance. 1) If the clearance is not in the tolerance, loosen the

 checknut and adjust the spoiler again.
 S 432-051
 (7)  
If the clearance is in the tolerance, tighten the checknut:

 (a)  
Tighten the checknut to 2150-2350 pound-inches (243-265Nm).

 (b)  
Loosen the checknut and make sure the parts of the locking device stay engaged correctly.

 (c)  
Tighten the checknut to 2150-2350 pound-inches (243-265Nm).

 1)  Make sure the parts of the locking device stay engaged correctly.

 (d)  
Install the lockwire on the checknut and the locking device.

 (e)  
Clean all grease from the checknut and the locking device with naphtha.

 (f)  
Apply the silicone sealant on the checknut and the locking device.

 (g)  
Lower the spoilers.

 H.  
Examine the Operation of the Ground Spoiler

 S 722-053
 (1)  
Put the speed brake lever in the FLIGHT position.

 (a)  
Make sure the ground spoilers smoothly move to the 20-degree position in less than 1 second.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-62-05
 ALL  ú ú 10 Page 210 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 712-054
 (2)  
Put the speed brake lever in the UP position.

 (a)  
Make sure the ground spoilers move from the 20-degree position to the 45-degree position in less than 1 second.

 S 712-055
 (3)  
Put the speed brake lever in the FLIGHT position.

 (a)  
Make sure the ground spoilers move to the 20-degree position in less than 1 second.

 S 712-056
 (4)  
Put the speed brake lever in the DOWN position.

 (a)  
Make sure the ground spoilers fully retract in less than 2.5 seconds.

 I.
Put the Airplane Back to Its Usual Condition

 S 412-057
 (1)  
Close the applicable access panel 572CB or 672CB.

 S 862-058

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

 S 612-059

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

 S 862-060

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

 S 862-061

 (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 27-62-05-002-062
 4. Thermal Relief Valve Removal (Fig. 201)
____________________________
 A. Standard Tools and Equipment
 (1)  
Bolt 5/8-18, at least 3 inches long (76.2mm)

 B.
References

 (1)  
AMM 24-22-00/201, Manual Control

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

 (3)  
AIPC 27-62-28, Fig. 1

 C.
Access

 (1)  
Location Zone
 574 Spoiler No. 6
 674 Spoiler No. 7

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-62-05
 ALL  ú ú 05 Page 211 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (2)  
Access Panels
 572CB Trailing Edge Lower, LH
 672CB Trailing Edge Lower, RH

 D.
Procedure

 S 862-063
 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 HYDRAULIC SYSTEMS NO. 1 AND 4, THE SPOILERS WILL AUTOMATICALLY RETRACT. THIS CAN CAUSE INJURY TO PERSONS.
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 飛行操縱 FLIGHT CONTROLS 7(13)