(10)
 Disconnect the sensor connectors D1771 (A system) or D1679 (B system).

 S 485-082

 (11)
 Connect the sensor connectors to the -4 test cable, between the sensor and J-4 (B SENSOR) on the test set.

 S 865-015

 (12)
 Set the switches on the test set as follows:

 (a)  
LVDT FEEDBACK switches A and B to the ON position

 (b)  
LVDT EXCITATION switches A and B to the ON position

 (c)  
NSS EXCITATION switches A and B to the OFF position

 (d)  
NSS FEEDBACK switches A and B to the OFF position

 (e)  
All SOLENOID EXCITATION PISTON and ENGAGE switches to the ON position

 (f)  
CURRENT SELECT switch to A T-VALVE

 (g)  
SOLENOID switches to the A NORM, ON, and B NORM positions

 (h)  
ACTUATOR SELECT switch to the A and B COMMON position

 (i)  
POWER switch to the ON position.

 NOTE: NSS EXCITATION lights will be off.
____
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 865-003
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (13) Supply hydraulic pressure (AMM 27-31-00/201).
 E. Sensor Adjustment
 S 825-018
 (1)  
Turn the POSITION CONTROL A knob on the test set until the meter is at its lowest value (A/P actuators at null).

 S 825-019

 (2)  
Turn the POSITION CONTROL A knob on the test set until the elevator surfaces move down and the voltage at J10A and J11A increases to

 2.00 |0.05 volts.
 S 825-020
 (3)  
Make sure the right elevator trailing edge is in line with the tail cone index |0.06 inch.

 S 085-021

 (4)  
Remove the VTVM from jacks J10A and J11A.

 S 485-083

 (5)  
Connect the VTVM to B NSS FEEDBACK jacks J7B and J8B on the test set.

 (6)  
Loosen the screw on the sensor clamp until you can turn the sensor.

 (7)  
Turn the sensor case slowly until you get 0.48 |0.05 volts.

 (8)  
Tighten the clamp screw 8 to 12 pound-inches.

 S 485-024

 (9)  
Remove the lockwire and turn the thumbnut on the microadjustment rod until you get a value of 0.48 |0.03 volts.

 S 035-022
 S 825-023
 S 435-077
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 485-025
 (10)
 Move the elevator trailing edge up and make sure the voltage decreases. This makes sure that the sensor is set to the correct side of the null. If not correct, repeat steps (5) thru (7) until you get the correct null.

 S 435-026

 (11)
 Install the lockwire in the thumbnut.

 F. Put the airplane back to its initial condition.
 S 085-027
 (1)  
Disconnect the VTVM.

 S 085-028

 (2)  
Remove the test cable and connect the sensor connectors to the airplane wire.

 S 085-029

 (3)  
Remove the test cables and connect D1681 to A/P actuator A and D1687 to A/P actuator B.

 S 085-030

 (4)  
Remove the test set power cables.

 S 415-031

 (5)  
Install the access panel on the tail cone.

 TASK 22-11-30-745-032
 3. Elevator Position Sensor Adjustment (DFCS BITE)
___________________________________
 A. General
 (1)  The adjustment of the elevator position sensor is given as part of DFCS BITE, which uses the FMCS CDU.
　
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