(a)  
Adjust the yaw damper pogo until rig pin R8 can be installed.

 (b)  
Tighten the jamnuts.

 L.  
Prepare to Adjust the Ratio Changer Mechanism and the Rudder Power Control Actuators (PCAs) (Fig. 506 and 508)

 S 215-111
 (1)  
Make sure the FLT CONTROL SHUTOFF switches L, R, and C on the P61 panel are OFF. Make sure the DO-NOT-OPERATE tags are attached.

 S 045-112

 (2)  
Do these steps to deactivate the yaw damper servos:

 (a)  
Move the yaw damper switches on the P5 panel to their INOP position.

 (b)  
Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags: 1) 11A18, YAW DAMPER LEFT 2) 11F34, YAW DAMPER RIGHT

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 S 865-113
 (3)  Remove the DO-NOT-CLOSE tag and close this circuit breaker on the
 P11 panel:
 (a)  11C10, RUD TRIM
 S 495-114
 (4)  Operate the rudder trim switch on the P8 panel and install this rig
 pin:
 (a)  R3 (for the aft quadrant)
 NOTE:____ Rig pin R3 will stay installed during the adjustment
 procedure.

 S 215-115
 (5)  Make sure you can install rig pin R9 through the shear pin inspection holes in these components:
 NOTE:____This examines the shear pins for damage. Replace the shear pin if the rig pin does not go through the inspection hole.
 (a)  
The Rudder PCA input lever (View B, Fig. 508)

 (b)  
AIRPLANES WITH SHEAR PINS; The Yaw damper linkage (View A-A, Fig. 507)

 (c)  
The ratio changer output crank (View C, Fig. 506).

 S 215-620
 (6)  AIRPLANES WITH SHEAR RIVETS; Make sure that rig pin R9 can be easily installed through the inspection hole that is located below the yaw damper shear rivets (Fig. 507).
 NOTE: If rig pin R9 can not be installed through the inspection
____ hole, you must examine the shear rivets for damage.
 S 865-392
 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. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 (7)  
Supply pressure to the left hydraulic system (AMM 29-11-00/201).

 S 865-391

 (8)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:

 (a)  
11H17, FLT CONT SHUTOFF TAIL LEFT

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 S 865-395
 (9)  
Remove the DO-NOT-OPERATE tag and move the FLT CONTROL SHUTOFF switch L on the P61 panel to ON.

 S 865-116

 (10)
 Move the left RRCM test switch on the E3 equipment shelf to TEST and do these checks:

 NOTE: The amber RUDDER RATIO light on the P5 panel will come on and
____ stay ON. An amber RUDDER RATIO message will come into view on EICAS when the RRCM test switch is in its TEST position.
 (a)  
Make sure the IN TEST light stays on for a maximum of 18 seconds.

 (b)  
After 30 seconds, make sure all the RRCM faultballs are black.

 1)  If the faultballs are not black, do the RRCM BITE procedure (FIM 27-09-00/101, Fig. 106B).
 S 865-393
 (11)
 Remove the power from the left hydraulic systems (AMM 29-11-00/201).

 S 865-396

 (12)
 Move the FLT CONTROL SHUTOFF L switch on the P61 panel to OFF. Attach a DO-NOT-OPERATE tag and make sure the switch position lights come ON.

 S 865-394

 (13)
 Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag:
　
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