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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
SEE B QUADRANT STOP
CABLE SBA SPEED BRAKE CABLE QUADRANT 3 PIN SB-1 RIG
CABLE SBB
CONTROL ROD
GROUND SPOILER CONTROL VALVE
A PIN SB-2 RIG SEQUENCE MECHANISM SPEED BRAKE
WITH THE SPEED BRAKE CONTROL LEVER IN THE DOWN POSITION, THE QUADRANT MUST TOUCH THIS STOP
B
3 Speed Brake Control System Rig Pin Locations Figure 502 (Sheet 2) THE QUADRANT IS SHOWN IN BRAKE POSITION THE "FLIGHT DETENT" SPEED
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
0.12-0.14 INCH CAM ROLLER
1
(3.04-3.55 mm)
CAM FOLLOWER
LOBE
CAM CAM FOLLOWER SUPPORT BRACKET
ADD OR REMOVE SHIMS AS NECESSARY
ACTUATOR INPUT CONTROL ROD CHECKNUT
UPSTOP
ARM SWITCH 1
2
ARM SWITCH STRIKER PLATE 1 SWITCH ACTUATION POINT
MANUAL
ACTUATOR CONTROL
ARM SHOE LOCKING (1.78-2.29 mm) 0.07-0.09 INCH CONTROL ROD ROD
SPEED BRAKE
CONTROL LEVER A
FLIGHT
ARM
POSITION FLIGHT DETENT
(STOP) POSITION
DN UP POSITION
POSITION MANUAL
INPUT
CASTING
ACTUATOR INPUT CASTING
0.030-0.060 INCH
(0.76-1.52 mm)
CLEARANCE NOTE:THIS IS SHOWN WITH:
-THE AUTOMATIC SPEED BRAKE ACTUATOR EXTENDED
SEE A -THE CONTROL LEVER IN THE DN POSITION -THE AUTOMATIC SPEED BRAKE CONTROL SYSTEM
A
DEACTIVATED
A-A
ACTUATOR CONTROL ROD
DRUM MECHANISM
A
1 SPEED BRAKE
CONTROL LEVER
IN THE DN POSITION ARM SWITCH
2
SPEED BRAKE CONTROL LEVER AUTOMATIC SPEED IN THE UP POSITION BRAKE ACTUATOR
Automatic Speed Brake Actuator Adjustment Figure 503
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
A
A
CONTROL PACKAGE TRAILING EDGE BEAM GROUND SPOILER 1 SPOILER-TFLAP MINIMUM CLEARANCE
SEE A PISTON ROD END A-A
PACKAGE CONTROL PISTON ROD DEVICE CHECKNUT LOCKING CONTROL ROD END PACKAGE PISTON
NOTE:____ 1 THE AIRPLANE MUST BE SUPPORTED ON ITS LANDING GEAR WHEN YOU MEASURE THIS CLEARANCE. BECAUSE OTHER PARTS OF THE PANEL CAN HAVE A GREATER AT THE NEAREST POINT. THERE IS NO MAXIMUM CLEARANCE THE SPOILER PANELS ARE NOT FLAT. MEASURE THE CLEARANCE PRELOAD AGAINST THE MIDFLAP CLEARANCE. THE SPOILER HAS A 0.50 INCH (12.7 mm) A
Ground Spoiler-to-Flap Clearance Figure 504
C88896
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 835-031
(21)
Adjust the speed brake position transducer:
(a)
Move the speed brake lever to the DN position.
(b)
Make sure you can easily install the rig pin SB-4 through the input lever and the transducer housing. 1) If it is necessary, adjust the transducer input control
rod. 2) Tighten the checknuts on the control rod.
S 835-032
(22)
Adjust the ground spoiler control valve (Fig. 502):
(a)
Move the speed brake lever to the DN position.
(b)
Make sure you can easily install the rig pin SB-2 in the ground spoiler control valve. 1) If it is necessary, adjust the control rod until you can
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