S 715-114
(4)
Move the speed brake lever to the ARM position.
(a)
Make sure the speed brake lever does not operate automatically.
S 865-115
(5)
Do this task to pressurize hydraulic system No. 4 with an air-driven pump or an engine-driven pump: "Hydraulic System Pressurization" (AMM 29-11-00/201).
S 715-116
(6)
Make sure that the speed brake lever moves to the UP position automatically.
NOTE: The speed brake lever can hesitate briefly between the ARM
____ and the UP positions while hydraulic system No. 4 comes up to full pressure.
S 865-117
(7)
Do this task to remove hydraulic system No. 4 power: "Remove Hydraulic Power" (AMM 29-11-00/201).
S 715-118
(8)
Do the test of the hydraulic pressure inputs to the PSEU and the Automatic Speed Brake Actuator again with hydraulic system No. 1.
O.
Put the Airplane Back to Its Usual Condition
(1)
Move the speed brake lever to the DN position.
S 865-120
(2)
Put the FLT CONTROL HYD PRESSURE - WING switches No. 1, 2, 3, 4 to the NORM position.
S 865-119
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A 747-400 MAINTENANCE MANUAL
(3) S 865-121Do this task: "Remove Hydraulic Power" (AMM 29-11-00/201).
(4) S 865-122Do this task: "Remove Electrical Power" (AMM 24-22-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
GROUND SPOILERS - REMOVAL/INSTALLATION
______________________________________
1. General_______
A. There are two tasks in this procedure. There is a task for the removal and a task for the installation of a ground spoiler.
(1)
The removal procedure has these parts:
(a)
The extension of the spoilers
(b)
The extension of the trailing edge flaps
(c)
The installation of the support equipment
(d)
The removal of the ground spoiler.
(2)
The installation procedure has these parts:
(a)
A check of the parts that attach the ground spoiler for worn areas
(b)
The installation of the ground spoiler
(c)
The removal of the support equipment
(d)
An adjustment of the clearance between the ground spoiler and the wing
(e)
An adjustment of the seals
(f)
An adjustment of the clearance between the spoiler and the flaps.
TASK 27-62-01-004-001
2. Ground Spoiler Removal (Fig. 401)______________________
A. Special Tools and Equipment
(1)
OHME65B00115, Sling Assembly
(2)
24MIT65B00002, Safety Device for Wing and Stabilizer
(3)
PRE65B00002, Safety Device for the Wing Top Surface
(4)
G27002-1, Spoilers No. 6 and No. 7 Locking Tool
B.
Standard Tools and Equipment
(1)
Load positioner (for 90 pounds) - 3100T21, McMaster-Carr
P.O.
Box 54960, Los Angeles, California 90054
C.
References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 24-22-00/201, Manual Control
D.
Access
(1)
Location Zone
574 Spoiler No. 6
674 Spoiler No. 7
E.
Prepare for the Removal
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