RIGHT
D
WING WING

D
RUDDER
DOWN

EDOWN
POSITION
R TRANSMITTERS
A
LOWER RUDDER
B
Rudder Position Indicating System Component Location Figure 1
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747-400
MAINTENANCE MANUAL

16.2
16.2
Rudder Position Indicating System EICAS Displays
Figure 2

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747-400
MAINTENANCE MANUAL

28V AC BUS 3 RUDDER TRIM IND

28V DC

BUS 3 RUD/ELEV IND
28V AC BUS 3 RUD/ELEV SNSR

M8011 SURFACE POSITION E2-6 ELECTRONICS SHELF DIGITIZER CARD FILE (E8 AFT RACK)
Rudder Position Indicating System Schematic
Figure 3

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747-400 MAINTENANCE MANUAL
 RUDDER POSITION INDICATING SYSTEM - ADJUSTMENT/TEST
___________________________________________________
 1.  General
_______
 A.  There are two tasks in this procedure. There is one task for the operational test and one task for the adjustment of the rudder position indicating system. The procedure has these parts:
 (1)  
The operational test of the rudder position indicating system

 (2)  
The installation of the rig pin R-4 and the rig pin M520392-4C at the position transmitter

 (3)  
The adjustment of the rudder position transmitter.

 B.  
The adjustment is the same for the upper or the lower rudder position transmitter.

 C.  
AIRPLANES WITH IDS SOFTWARE 685-2265-005 (PW), OR 995-0017-003 (GE), OR 995-0054-002 (RR); The rudder position indicators on the EICAS status page cannot move all the way to the full scale marks when the rudders are at the full left or right travel.

 TASK 27-28-00-715-001
 2.  Operational Test - Rudder Position Indicating System
____________________________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-50-00/201, Steering

 (4)  
SSM 27-28-01

 (5)  
WDM 27-28-11

 B.  
Access

 (1)  
Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 C.  
Procedure

 S 865-002
 (1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 S 865-004

 (2)  
Make sure the FLT CONTROL HYD POWER TAIL switches on the P461 Pilots' Overhead Maintenance Panel are in NORM.

 S 865-005
 WARNING: MOVE ALL PERSONS AND EQUIPMENT AWAY FROM THE FLIGHT CONTROL
_______ SURFACES BEFORE YOU PRESSURIZE THE HYDRAULIC SYSTEMS. THE FLIGHT CONTROL SURFACES CAN MOVE QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3) Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).
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