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 ú  02  Page 16
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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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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