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A
747-400
MAINTENANCE MANUAL
MECHANISM DIFFERENTIAL FROM SPOILER BEAM RIGGING VERTICAL
UPPER CLEVIS
AFT (CLCP) LATERAL CENTRAL PACKAGE PORT RETURN CONTROL UPPER PISTON MECHANISM TO TRIM & FEEL
CONTROL ROD
CONNECTOR ELECTRICAL INPUT LEVER
RETURN PORT
PRESSURE PORTPRESSURE PORT LOWER PISTON
LOWER CLEVIS
TO RIGHT CLCP INPUT LIMITER BUS ROD FROM AILERON PROGRAMMER
ROTATED FOR CLARITY
B
____NOTE: LEFT CENTRAL LATERAL CONTROL
PACKAGE SHOWN.
Central Lateral Control Package
Figure 7 (Sheet 2)
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A
747-400
MAINTENANCE MANUAL
LEFT EAS
(B7081)
SEE B
CENTER EAS RIGHT EAS
ELEVATOR AUTOPILOT (B7082) (B7083)
(3 LOCATIONS) SERVO (EAS) SEE B SEE B
SEE A
CONTROL RODS
FWD
CLEVIS/TUBE
ASSEMBLY
TORQUE
TUBE
ELEVATOR
AUTOPILOT
SERVO (EAS)
A
AUTOPILOT
LVDT
ELECTRICAL
CONNECTOR
ENGAGE
LVDT OUTPUT SOLENOID VALVE
HYDRAULIC ARM ELECTROHYDRAULIC
RETURN SOLENOID SERVOVALVE
HYDRAULIC VALVE (EHSV)
PRESSURE FWD
B
Elevator Autopilot Servo
Figure 8
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C18671
A
747-400
MAINTENANCE MANUAL
FEEL AND CENTERING UNIT BELLCRANK
FEEL AND
SEE B CENTERING UNIT ASSEMBLY
SEE A CLEVIS/TUBE ASSEMBLY
OVERRIDE
HYDRAULIC MECHANISM
FITTINGS CAM
ELECTRICAL CONNECTOR
HYDRAULIC FITTINGS FWD
CONTROL ROD
AUTOPILOT ASSEMBLY
LVDT
ROLLOUT POWER CONTROL PACKAGE (3 LOCATIONS)
HYDRAULIC A
PRESSURE
ROLLOUT POWER CONTROL PACKAGE (RPCP)
OUTPUT CRANK
ARM
SOLENOID
VALVE
ELECTROHYDRAULIC SERVOVALVE
FILTER
HYDRAULIC
RETURN
FWD
ELECTRICAL
CONNECTOR
ENGAGE
SOLENOID
OUTPUT
VALVE
LVDT
B
Rollout Power Control Package and Override Mechanism
Figure 9
D20517
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A 747-400 MAINTENANCE MANUAL
HORIZONTAL STABILIZER
SEE A
STABILIZER TRIM CONTROL MODULE (STCM)
BULKHEAD
ELECTRICAL CONNECTOR
BULKHEAD
STABILIZER TRIM
CONTROL MODULE
(2 PLACES)
SEE B
RATE CONTROL SOLENOID
ELECTRICAL A
CONNECTORS
ARM AND CONTROL SOLENOIDS
HYDRAULIC CONNECTIONS
PRESSURE SWITCH
ELECTRICAL CONNECTOR
AFT
B
Stabilizer Trim Control Module
Figure 10
HORIZONTAL STABILIZER JACKSCREW
STABILIZER TRIM LIMIT SWITCHES
AFT
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