(b)
The depressurization of the hydraulic system No. 4
(c)
The removal of the control valve.
(2)
The installation of the ground spoiler control valve has these parts:
(a)
The installation of the control valve
(b)
An adjustment of the control valve
(c)
A test of the ground spoilers
(d)
The removal of the landing gear door locks
TASK 27-62-04-004-001
2. Ground Spoiler Control Valve Removal (Fig. 401)____________________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
29-11-00/201, Main Hydraulic Supply System
(3)
32-00-30/201, Landing Gear Door Locks
(4)
IPC 27-62-20 Fig. 2
B.
Access
(1)
Location Zone
136 Wing Landing Gear Well, RH
C.
Procedure
(1)
Make sure the landing gear ground locks are installed.
S 864-002
S 494-003
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do this task: "Wing Landing Gear Door Lock Installation" (Ref 32-00-30/201).
(3)
Do this task: "Supply Electrical Power" (Ref 24-22-00/201).
S 864-004
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27-62-04
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A
CONTROL ROD
UP 1 RIG PIN SB-2
PORT
UP 2
PORT PRESSURE
PORT
GROUND SPOILER
CONTROL VALVE
RETURN PORT
A
Ground Spoiler Control Valve Installation
Figure 401
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27-62-04
ALL ú ú 01 Page 402 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-005
(4)
Put the FLT CONTROL HYD POWER - WING system 4 switch on the overhead panel P5 to SHUTOFF.
S 864-006
(5)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P180 DC Power Distribution Panel
1) 180E22 LATERAL CONT VLV SYS 4
S 844-007
(6)
Do this task to depressurize hydraulic system No. 4: "Depressurize Hydraulic System" (Ref 29-11-00/201).
S 024-008
(7)
Remove the control valve:
(a)
Remove the bolt that attaches the control rod to the control valve.
(b)
Disconnect the four hydraulic lines from the control valve.
(c)
Remove the bolts from the control valve.
(d)
Remove the control valve.
(e)
Install the caps on the hydraulic lines and in the control valve.
TASK 27-62-04-404-009
3. Ground Spoiler Control Valve Installation (Fig. 401)_________________________________________
A. Special Tools and Equipment
(1)
G12001-50 Rig Pin Kit
B.
References
(1)
12-12-01/301, Hydraulic Systems
(2)
24-22-00/201, Manual Control
(3)
29-11-00/201, Main Hydraulic Supply System
(4)
32-00-30/201, Landing Gear Door Locks
(5)
IPC 27-62-20 Fig. 2
C.
Access
(1)
Location Zone
136 Wing Landing Gear Well, RH
D.
Procedure
S 424-010
(1)
Install the control valve:
(a)
Remove the caps from the hydraulic lines and from the control valve.
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本文链接地址：747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 7(7)
