757
MAINTENANCE MANUAL

PEDAL NEUTRAL POSITION. DIMENSION "C" IS THE FULL AFT
PEDAL NEUTRAL POSITION.  A-A
Rudder and Rudder Trim Control System Test
Figure 509

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A

757
MAINTENANCE MANUAL

CONTROL
LINKAGES

SEE A
R 
POWER CONTROL 
YAW DAMPER  ACTUATOR (3) 
SERVOS 
322BZ  SEE  B 
CONTROL RODS 
TO PCA'S  L 

SUMMING INPUT CRANK
LEVER
C YAW DAMPER SUMMING LEVER
LEFT POSITIONOUTBOARD TRANSMITTERGROUNDING
SPRING YAW DAMPER SERVO (2)
RIGHT OUTBOARD SEE B YAW DAMPER POGO GROUNDING SPRING
PRIMARY CONTROL RODC
L  RATIO CHANGER POGOBIAS POGO
ROD (SECONDARY CONTROL ROD) YAW
RUDDER THERMAL RUDDER RATIODAMPER COMPENSATING CHANGERSERVO LINKAGE
(2 LOCATIONS) SEE CRATIO CHANGER ACTUATOR
TRIM ACTUATOR
AFT QUADRANT
RA
YAW DAMPER SERVOS  FEEL, CENTERING, AND TRIM MECHANISM
RB
B
FWD
R AUTOPILOT ROLLOUTC
GUIDANCE SERVOS (3) L CONTROL LINKAGES
A
Rudder Thermal Compensating Linkage Adjustment Figure 510 (Sheet 1)
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INPUT CRANK HAMMER
TOP CLEARANCE

INPUT CRANK HAMMER

RUDDER THERMAL COMPENSATING LINKAGE
CRudder Thermal Compensating Linkage Adjustment Figure 510 (Sheet 2)
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757
MAINTENANCE MANUAL

 S 215-029
 WARNING: KEEP ALL PERSONS AND EQUIPMENT AWAY FROM THE NOSE GEAR AND THE
_______ RUDDER BEFORE THE RUDDER PEDALS ARE OPERATED. THE RUDDER CAN MOVE QUICKLY AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  
Apply a light load equally to the two captain's rudder pedals at the same time (approximately 2.5 pounds (11 Newtons) on each pedal) and do these steps:

 (a)  
Turn the captain's pedal adjustment crank approximately one turn for each second to move the pedals to their full aft position. Do this check: 1) Make sure the crank and the pedals move smoothly and that

 the crank does not need too much force.

 (b)  
Turn the captain's pedal adjustment crank approximately one turn for each second to move the pedals to their full forward position. Do this check: 1) Make sure the crank and the pedals move smoothly and that

 the crank does not need too much force.
 NOTE: It is permitted for the pedals to shake lightly
____ during their movement.
 (c)  Remove the load from the rudder pedals.
 WARNING: STAY AWAY FROM THE NOSE WHEELS WHEN THE RUDDER PEDALS ARE
_______ OPERATED. THE WHEELS CAN TURN QUICKLY AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (d)  
Operate the rudder pedals through their full travel range and do this check: 1) Make sure the pedals move smoothly and do not need too much

 force.

 (e)  
Release the rudder pedals and do this check:

 1)  Make sure the rudder pedals go back to their neutral positions.
 S 715-030
 (3)
Do the rudder pedal test again for the first officer's pedals.

 E.  
Single Hydraulic System - Rudder Control Test

 S 865-031
 (1)  Move the FLT CONTROL SHUTOFF switches L, C, and R on the right side panel, P61, to OFF. Attach DO-NOT-OPERATE tags and make sure the switch position lights come ON.
　
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