(a)  
P180 DC Power Distribution Panel
 1) 180H7, LATERAL CONT VALV SYS 1

 S 725-019
 (14)
 Make sure the valve motor operates smoothly until the indicator lever is in the valve closed position and then stops.

 S 865-020

 (15)
 Set the FLT CONTROL HYD POWER - WING VALVE switch No. 1 to NORM.

 (a)  
Make sure the valve motor operates smoothly until the indicator lever is in the valve open position and then stops.

 S 725-023
 (16)
 Do steps (9) through (14) again for systems No. 2, 3 and 4.

 S 865-024

 (17)
 Do this task:  "Hydraulic System Depressurization" (AMM 29-11-00/201).

 (18)
 Do this task: "Electrical Power Removal" (AMM 24-22-00/201).

 S 865-025
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 27-13-00
 ALL  ú ú 01 Page 503 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 HYDRAULIC SHUTOFF WING VALVE - REMOVAL/INSTALLATION
___________________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task is the removal of the hydraulic shutoff wing valve. The second task is the installation of the hydraulic shutoff wing valve.
 B.  There are four hydraulic shutoff wing valves in the aileron and spoiler systems. You can use this procedure to install or remove one or all of these valves.
 TASK 27-13-01-004-001
 2.  Hydraulic Shutoff Wing Valve Removal____________________________________
 A.  References
 (1)  
06-09-08/201, Wing Access Doors and Panels

 (2)  
24-22-00/201, Manual Control

 (3)  
29-11-00/201, Main Hydraulic Supply System

 (4)  
IPC 27-13-01 Fig. 1

 (5)  
SSM 27-13-01

 (6)  
WDM 27-13-11

 B.  
Access

 (1)  
Location Zone 592 Outboard Aileron, LH 692 Outboard Aileron, RH 571 Rear Spar to Landing Gear Support Beam, LH 671 Rear Spar to Landing Gear Support Beam, RH

 (2)  
Access Panel Gain access to rear spar through wing gear wheel well door: 591BB Outboard Aileron, LH 691BB Outboard Aileron, RH

 C.  
Procedure (Fig. 401)

 S 014-002
 (1)  
If you replace system No. 2 or 3 shutoff wing valves, get access to the rear spar through the opening of the wing gear wheel well.

 S 014-003

 (2)  
If you replace system No. 1 or 4 shutoff wing valves, remove the outboard aileron access panel 591BB (left) or 691BB (right) (Ref 06-09-08/201).

 (3)  
Supply electrical power (Ref 24-22-00/201).

 (4)  
Release the pressure from the hydraulic system (Ref 29-11-00/201).

 S 864-004
 S 864-005
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 ALL  ú ú 01 Page 401 ú Feb 15/99
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A
747-400 MAINTENANCE MANUAL
SYSTEM NO. 1 HYDRAULIC SUPPLY SYSTEM NO. 2 HYDRAULIC SUPPLY SHUTOFF WING OPPOSITE SHUTOFF WING VALVE

8. HYDRAULIC LINES
(USUAL 4 LOCATIONS)

Hydraulic Supply Shutoff Wing Valve
Figure 401

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 ALL  ú ú 01 Page 402 ú Oct 10/90
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A
747-400 MAINTENANCE MANUAL
 S 864-006
 (5)  
For the applicable system, open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P180 DC Power Distribution Panel
 1) 180H7 LATERAL CONT VALV SYS 1
 2) 180E6 LATERAL CONT VALV SYS 2
 3) 180H22 LATERAL CONT VALV SYS 3
　
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