(4)  
Install the electrical connector.

 E.  
Adjust the Rudder Position Transmitter

 S 864-016
 (1)  
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 S 864-018

 (2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P6, Main Power Distribution Panel
 1) 6J25, RUD/ELEV IND
 2) 6J24, RUD/ELEV SENSOR

 S 494-019
 (3)  
Install the rig pin MS20392-4C through the crank and the outer rig pin hole of the bracket.

 S 824-020

 (4)  
Adjust the rudder position transmitter:

 (a)  
Loosen the transmitter clamping screws.

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747-400 MAINTENANCE MANUAL
 (b)
Adjust the transmitter body to get an indication of 0 |0.2 degrees on the EICAS flight controls maintenance page.

 (c)  
Tighten the transmitter clamping screws to 5-10 pound-inches.

 S 834-022
 (5)  
Do the close adjustment if it is necessary:

 (a)  
Move the rig pin MS20392-4C to the inner hole.

 (b)  
Adjust the control rod.

 (c)  
Install the lockwire on the knurled thumb nut of the control rod.

 S 864-023
 (6)  
Make sure the control rod dimensions are as shown in Fig. 401.

 S 094-024

 (7)  
Remove the rig pin MS20392-4C from the transmitter assembly.

 S 094-025

 (8)  
Remove the rig pin R-4.

 S 414-026

 (9)  
Close the access panel 324FL.

 S 864-027

 (10)
 Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7, Overhead Power Distribution Panel
 1) 7D16, RUD TRIM CONT

 (b)  
P180, DC Power Distribtion Panel
 1) 180H8, ELEV/RUD VLV SYS 1
 2) 180E7, ELEV/RUD VLV SYS 2
 3) 180H23, ELEV/RUD VLV SYS 3
 4) 180E22, ELEV/RUD VLV SYS 4

 S 864-028
 (11)
 Set the FLT CONTROL HYD POWER TAIL switches on the P461, Pilots' Overhead Maintenance Panel to NORM.

 S 864-029

 (12)
 If the electrical power is not necessary, do this task:  "Remove Electrical Power" (AMM 24-22-00/201).

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747-400 MAINTENANCE MANUAL
 RUDDER/ELEVATOR SURFACE POSITION DIGITIZER - REMOVAL/INSTALLATION
_________________________________________________________________
 1.  General_______
 A.  There are two tasks in this subject. There is one task for the removal and one task for the installation of the rudder/elevator surface position digitizer (SPD) circuit card YM5A001 (which is referred to as the "card YM5A001"). The procedure has these parts:
 (1)  
The removal of the card YM5A001

 (2)  
The installation of the replacement card YM5A001

 (3)  
A check to make sure that rudder and elevator position readouts show on the EICAS flight controls maintenance page.

 B.  
The card YM5A001 is in the aft surface position digitizer card file M8011 (which is referred to as the "card file M8011"). The card file M8011 is on the E8 aft equipment rack.

 TASK 27-28-02-004-001
 2.  Rudder/Elevator Surface Position Digitizer Removal (Fig. 401)__________________________________________________
 A.  References
 (1)  
SSM 27-28-01, SSM 27-38-01

 (2)  
WDM 27-09-33, WDM 27-28-11, WDM 27-38-11

 B.  
Access

 (1)  
Location Zone 271 Passenger Cabin STA 2040 to STA 2360, E8 Aft Rack
　
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