27-21-00
 ALL  ú ú 04 Page 107 ú Jun 20/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 RUDDER AND RUDDER TRIM CONTROL SYSTEM - ADJUSTMENT/TEST
_______________________________________________________
 1.  General_______
 A.  This procedure contains the operational test, adjustment, and system test tasks for the rudder and the rudder trim control system. Refer to AMM 27-28-00 for adjustment and test procedures for the rudder position indicating system. Refer to AMM 22-21-00 for adjustment and test procedures for the yaw damper system.
 TASK 27-21-00-715-024
 2.  Operational Test - Rudder and Rudder Trim Control System________________________________________________________
 A.  References
 (1)  
AMM 22-13-01/401, Autopilot Rollout Guidance Servo

 (2)  
AMM 22-21-00/501, Yaw Damper System

 (3)  
AMM 24-22-00/201, Electrical Power - Control

 (4)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 B.  
Access

 (1)  
Location Zones
 211/212 Control Cabin
 320 Vertical Stabilizer and Rudder

 C.  
Prepare for the Test

 S 865-025
 (1)  Supply electrical power (AMM 24-22-00/201).
 S 865-001
 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 (2)  
Supply pressure to the left, right, and center hydraulic systems (AMM 29-11-00/201).

 S 865-027

 (3)  
Push the STATUS switch on the display select panel, P9, to show the rudder position indicator on the bottom EICAS display.

 D.  
Rudder Pedal Test

 S 825-028
 (1)  Turn the captain's pedal adjustment crank until the captain's rudder pedals are in their full forward position.
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 27-21-00
 ALL  ú ú 02 Page 501 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

RUDDER RATIO CHANGER MODULE (RRCM)

RUDDER TRIM INDICATOR
RUDDER TRIM SWITCH

AILERON AND RUDDER TRIM MODULE
RUDDER RATIO

Rudder Control System Components
Figure 501 (Sheet 1)

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 27-21-00
 ALL  ú
 ú  01  Page 502
 ú  Sep 20/98 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
FIRST OFFICER'S RUDDER PEDALS
RUDDER PEDAL RUDDER PEDALS CAPTAIN'S ADJUSTMENT CRANK
RUDDER PEDAL PUSHRODS
RUDDER PEDAL ADJUSTMENT JACKSHAFT (2)
CABLE RA
RUDDER PEDAL CABLE RB
ADJUSTMENT CABLE FORWARD
QUADRANT (2)
YAW DAMPER RUDDER PEDALS AND QUADRANTS SUMMING LEVER
C
RUDDER THERMAL
COMPENSATING
LINKAGE
C 
YAW DAMPER  L 
CONTROL LINKAGES  324CL  SERVO (2) 
SEE  E 
324BL  PCA 
YAW DAMPER 
SERVOS 
324AL 
RUDDER 

RATIO CHANGER
AFT QUADRANT ROLLOUT RA
GUIDANCE SERVOS RB
AFT RUDDER CONTROL COMPONENTS
D R
C L R
L POWER CONTROL
C ACTUATOR
(3)
POSITION TRANSMITTER
YAW DAMPER POGO
PRIMARY CONTROL ROD
RATIO CHANGER POGO ROD (SECONDARY CONTROL ROD)
RUDDER RATIO
CHANGER
RATIO CHANGER ACTUATOR
TRIM ACTUATOR
AFT QUADRANT FWD
FEEL, CENTERING,
AND TRIM MECHANISM
AUTOPILOT ROLLOUT GUIDANCE SERVOS (3)
CONTROL LINKAGES
E
Rudder Control System Components
Figure 501 (Sheet 2)

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