S 865-007

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  P18-1 Circuit Breaker Panel
 1) AFCS A SNSR EXC AC
 2) AFCS A FCC DC
 3) AFCS A ENGAGE INTLK

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (b)  4) AFCS WARN LIGHT 5) AFDS AIL FORCE LIMITER (737-300/-400 only) 6) AFDS MCP DC 7) MACH TRIM A AC 8) MACH TRIM A DC 9) AFC AUTO THROTTLE AC 10) AFC AUTO THROTTLE DC 11) AFC YAW DAMPER AC 12) AFC YAW DAMPER DCP6-2 Circuit Breaker Panel 1) AFCS B SNSR EXC AC 2) AFCS B FCC DC 3) AFCS B ENGAGE INTLK 4) AFCS WARN LIGHT 5) AFDS MCP CRS 2 DC 6) MACH TRIM B AC 7) MACH TRIM B DC 8) LANDING GEAR LATCH AIR/GND RELAY AND LIGHTS
 S 485-003
 (3)  Connect the power cable between the test set and the power outlet on the (D152) electronic equipment rack or an equivalent power outlet.
 S 035-004
 (4)  Disconnect D1827 (A system) and D1691 (B system) connectors from the autopilot actuators.
 S 485-005
 (5)  Connect the test A actuator to actuator A and test B actuator to actuator B.
 S 485-013
 (6)  Connect the VTVM to the LVDT FEEDBACK jacks J10A and J11A on the test set (A system).
 S 035-014
 (7)  Disconnect the airplane wire from the position sensors.
 S 485-006
 (8)  Connect the test cables between the A sensor and test A sensor and the B sensor to test B sensor.
 S 865-024
 (9)  Set the switches on the test set as follows: (a) LVDT FEEDBACK switches A to the ON position and B to the OFF position

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (b)  
LVDT EXCITATION switches A to the ON position and B to the OFF position

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

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

 (e)  
All SOLENOID EXCITATION PISTON and ENGAGE A switches to the ON position and B switches to the OFF 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 ONLY position

 (i)  
POWER switch to the ON position.

 NOTE: The power light and all A lights will be on.
____
 S 865-021
 (10) Supply electrical power (Ref 24-22-00/201).
 S 865-016
 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.
 (11) Supply hydraulic pressure (Ref 27-11-00/201).
 E. Sensor Adjustment (A system)
 S 825-018
 (1)  
Turn the position control knob on the test set until the meter is at its lowest value.

 S 865-022

 (2)  
Make sure the voltage between J10A and J11A is less than 0.075 volts and then lock the position control knob in its position.

 (3)  
Remove the VTVM from jacks J10A and J11A.

 (4)
Connect the VTVM to B NSS FEEDBACK J7B and J8B on the test set.

 (5)  
Loosen the screw on the sensor clamp until you can turn the sensor.

 S 085-021
 S 485-023
 S 035-022
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