(a)
324DL to get access to the lower rudder power control package.
(b)
324FR to get access to the feel, centering and trim mechanism.
(3)
Move the rudder pedals and the rudder trim to the neutral position.
S 865-004
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A
747-400
MAINTENANCE MANUAL
RUDDER CONTROL
MECHANISM
SEE A
A
A
RIG PIN E-2
SEE B
RUDDER FEEL,
RUDDER AFT CENTERING AND
QUADRANT TRIM MECHANISM
INPUT ROD POWER CONTROL ACTUATOR FOR THE RUDDER RATIO CHANGER
LOWER RUDDER
RATIO CHANGER
INPUT ROD FOR THE POWER CONTROL MODULE
RUDDER CONTROL MECHANISM
A
Lower Rudder Power Control Package Adjustment Figure 501 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
AUTOPILOT SERVO MODULES FOR THE ELEVATOR (3 LOCATIONS)
ELEVATOR AFT QUADRANT TORQUE TUBE
RIG PIN
E-2
RIG PIN E-2
TRAILING EDGE OF THE LOWER RUDDER
B
0.12 INCH (WIDTH OF THE INDEX GROOVE)
0.24 INCH (WIDTH OF THE INDEX TAB)
A-A
LOWER RUDDER ALIGNED WITH THE INDEX TAB (VIEW FROM THE REAR)
Lower Rudder Power Control Package Adjustment
Figure 501 (Sheet 2)
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747-400 MAINTENANCE MANUAL
S 495-005
(4)
Install the rig pin R-4 in the feel, centering, and trim mechanism.
S 485-039
(5)
Install the rig pin E-2 in the bottom of the aft quadrant of the elevator.
S 865-049
(6)
Supply Electrical Power (AMM 24-22-00/201).
S 495-038
WARNING:_______MAKE SURE THE NOSE LANDING GEAR IS POINTED FORWARD. IF THE TIRES ARE NOT PARALLEL WITH THE AIRPLANE, THEY CAN TURN QUICKLY WHEN YOU REMOVE THE TOW PIN. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(7) Install the TOW PIN at the steering metering valve for the nose landing gear (Ref 09-11-00/201).
NOTE: The nose gear will turn during the rudder operation if you do
____
not install the TOW PIN.
S 225-006
(8) Make sure the servo unit for the lower rudder ratio changer is in the retracted position.
NOTE: The servo unit is in the retracted position when the length
____ between the centers of the attachment bolts is 5.202-5.212 inches.
S 865-050
(9)
Open this circuit breaker and attach DO-NOT-CLOSE tag:
(a)
P180 DC Power Distribution Panel
1) 180J12 GND PWR SENSE
S 865-007
(10)
Make sure that these circuit breakers are closed:
(a)
P6 Main Power Distribution Panel
1) 6J19 RUDDER TRIM IND
(b)
P7 Overhead Circuit Breaker Panel
1) 7D16 RUDDER TRIM CONT
E.
Adjust the Lower Rudder Power Control Actuator
(1)
Pressurize systems No. 2 and 4 hydraulic power (AMM 29-11-00/201).
S 865-010
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