737-300/400/500
MAINTENANCE MANUAL

FLIGHT CONTROLS SWITCHES (SEE FIGURE 5)
STABILIZER TRIM CONTROL SWITCH
SPEED BRAKE CONTROL LEVER
RUDDER PEDALS FORWARD OVERHEAD PANEL

AILERON CONTROL WHEELS
STABILIZER TRIM CONTROL SWITCH
FLAP CONTROL LEVER
STABILIZER TRIM CONTROL WHEELS
Pilot's Controls
Figure 2

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A 737-300/400/500MAINTENANCE MANUAL
SPEED BRAKE HANDLE
ACBA
AILERON
CONTROL
WHEEL DRUM ACBB
AA
AILERON TRIM ACTUATOR
FLIGHT SPOILER ABSA
CABLE SLACK TAKEUP
AILERON
WING
QUADRANT
TRANSFER MECHANISM 
AB  SPOILER CONTROL DRUM AILERON CONTROL QUADRANT  FLIGHT SPOILER  AILERON BUS SYSTEM CABLES 
AB AA 
ABSB  ABSA 
ABSB  MECHANISM SPOILER MIXER AILERON AILERON POWER CONTROL UNITS AILERON SPRING CARTRIDGE ARTIFICIAL FEEL CENTERING AND TRIM  AILERON BALANCE TAB 
AILERON BALANCE TAB 
AILERON 

Roll Control System Schematic
Figure 3

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A 737-300/400/500MAINTENANCE MANUAL
SEE  A 
LOW PRESSURE 
WARNING 
HOUSING  SWITCH 
SPOILER 
SHUTOFF  FLIGHT CONTROLS 
VALVE  SHUTOFF VALVE 

COMPENSATOR CARTRIDGE
A
Flight Controls Hydraulic Modular Package Figure 4
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A 737-300/400/500MAINTENANCE MANUAL
FLIGHT SPOILER ACTUATOR GROUND SPOILERTYPICAL (4 LOCATIONS) ACTUATOR INBOARD
SEE DETAILS A AND C
(FIG. 5 SHT 4)

SEE DETAIL B
3 45 6
LOW PRESSURE
SWITCH
2

7
5

7 9 4
8 1
13
2
0
FLIGHT CONTROLS
54 6
SHUTOFF VALVE
12

HYDRAULIC
HYDRAULIC SYSTEM "B"
SPOILER SHUTOFF RET SYSTEM "A" RET

PRESS  PRESS
2
VALVE
AILERON POWER AILERON POWER

1
CONTROL UNIT CONTROL UNIT
MANUAL HYDRAULIC
ISOLATION VALVES

5 5
6 6
FLIGHT CONTROLSHYDRAULIC MODULARFLIGHT CONTROLS
3 3
HYDRAULIC MODULARPACKAGE SYSTEM A
7 7
PACKAGE SYSTEM B
2
2 4 4
CHECK VALVE STANDBYHYDRAULIC SYSTEM
COMPENSATOR
RUDDER
CARTRIDGE PRESSURE
REDUCER

RUDDER POWER RET PRESSCONTROL UNIT
1
ELEVATOR POWERCONTROL UNIT
(TYPICAL)
LEGEND
PRESSURE
67
RETURN
SPOILER RETRACT
SPOILER EXTEND RUDDER STANDBYPOWER UNIT
1
NOT INSTALLED ON ALL ELEVATOR FEEL COMPUTERELEVATOR HYDRAULIC
AIRPLANES (SB 27A1206)  1
FEEL DIFFERENTIAL PRESS SW FEEL ACTUATOR
Flight Controls System Hydraulic Schematic
Figure 5 (Sheet 1)

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T82002
A

737-300/400/500MAINTENANCE MANUAL 
NORMAL 
BYPASS 
FLAP 
ASYMMETRY 
SHUTOFF 
RELAY 
28V DC  OFF 
DC BUS NO. 1 
FLAP VALVES 
　
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