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(a) Make sure you can install the rig pin R-5 freely. If you cannot install the rig pin freely, adjust
the rudder trim actuator:
1) Jiggle and release the feel and centering unit input arm to make sure the system is
centered.
2) Move the rudder trim knob until rig pin R-5 can be installed freely.
(10) Make sure the rudder trim indicator is at 0.00 +/- 0.25 unit of trim.
(a) If indicator is not at 0.00 +/- 0.25 unit of trim, adjust the trim indicator per
AILERON/RUDDER TRIM CONTROL MODULE, SUBJECT 27-11-94.
SUBTASK 27-21-00-860-081-002
(11) Set the FLT CONTROL A and B switches to OFF.
SUBTASK 27-21-00-480-019-002
(12) Install the rig pins R-3, and R-4 (Figure 501).
(a) If only one rig pin can be inserted freely, adjust the bus rod per Rudder Forward Quadrant
Adjustment, TASK 27-21-00-820-806-002.
(b) If both rig pins cannot be installed freely, adjust the control cables RA and RB, do this task:
Rudder Control Cables RA and RB Adjustment, TASK 27-21-00-820-808-002.
(13) Install the rig pins R-1 and R-2.
(a) If you cannot install the rig pins freely, adjust the pedal tension rods per Rudder Pedals
Adjustment, TASK 27-21-00-820-807-002.
SUBTASK 27-21-00-080-005-002
(14) Remove the rig pins R-1, R-2, R-3, and R-4.
G. Control Rods for the Main PCU Adjustment
SUBTASK 27-21-00-860-082-002
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDER,
ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN
MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY
TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Set the FLT CONTROL B switch to ON.
SUBTASK 27-21-00-210-002-002
(2) Make sure that the YAW DAMPER switch on the P5-3 panel is in the OFF position and the YAW
DAMPER light is illuminated.
SUBTASK 27-21-00-860-083-002
(3) Open this circuit breaker and install safety tag:
F/O Electrical System Panel, P6-2
Row Col Number Name
D 19 C00787 FLIGHT CONTROL TRIM CONT RUD
NOTE: Do not change the position of the rudder trim knob until the Main PCU control rods and
the Standby PCU control rod have been adjusted.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-00
Config 2
Page 528
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-21-00-820-027-002
(4) Do these steps to put the rudder trailing edge to the left of the index plate:
NOTE: Always start the adjustment of the control rod with the rudder at this position.
(a) Loosen the clamp nut [35] on the lower control rod [36] until you can rotate the sleeve [37].
(b) Rotate the sleeve [37] until the rudder trailing edge is between 0.30 in. (7.6 mm) to 0.50 in.
(12.7 mm) to the left of the index plate.
NOTE: One full rotation of the sleeve [37] will move the rudder trailing edge 0.18 degree
(0.18 inch). Rotate the sleeve [37] clockwise (looking aft) will move the rudder
trailing edge left. Rotate the sleeve [37] counter-clockwise (looking aft) will move
the rudder trailing edge right.
SUBTASK 27-21-00-860-084-002
(5) Set the FLT CONTROL B switch to OFF and FLT CONTROL A switch to ON.
SUBTASK 27-21-00-820-028-002
(6) Do these steps to put the rudder trailing edge to the left of the index plate:
NOTE: Always start the adjustment of the control rod with the rudder at this position.
(a) Loosen the clamp nut [35] on the upper control rod [36] until you can rotate the sleeve [37].
(b) Rotate the sleeve [37] until the rudder trailing edge is between 0.30 in. (7.6 mm) to 0.50 in.
(12.7 mm) to the left of the index plate.
NOTE: One full rotation of the sleeve [37] will move the rudder trailing edge 0.18 degree
(0.18 inch). Rotate the sleeve [37] clockwise (looking aft) will move the rudder
trailing edge left. Rotate the sleeve [37] counter-clockwise (looking aft) will move
the rudder trailing edge right.
SUBTASK 27-21-00-860-153-002
(7) Set the FLT CONTROL A switch to OFF.
SUBTASK 27-21-00-080-008-002
(8) Install the rig pin R-5 in the rudder feel and centering unit.
SUBTASK 27-21-00-980-002-002
(9) Push the rudder trailing edge to the right of the index plate 10 in. (254 mm) or more to rotate the
overrides out of the detent position then smoothly return the rudder back to the center position.
NOTE: Do not move the rudder surface again until both of the control rods [36] have been
adjusted.
SUBTASK 27-21-00-080-009-002
(10) Remove the rig pin R-5.
SUBTASK 27-21-00-860-154-002
(11) Set the FLT CONTROL A switch to ON.
　
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