(d)
Remove the bolt, the washer and the nut in the sensor clamp.
(e)
Remove the sensor.
TASK 22-11-14-404-013
3. Install the Elevator Neutral Shift Sensor
__________________________________________
A. References
(1)
12-31-41/201, Body Section 48 Access Doors and Panels
(2)
AMM 22-11-14/501, Elevator Neutral Shift Sensor
(3)
27-41-00/501, Horizontal Stabilizer Trim Contrl System
B. Access
(1)
Location
705 Tail Cone Access Door
(2)
Access Panel
3802 Tail Cone Access Door
C. Procedure
S 864-006
(1) Set the horizontal stabilizer to 3 units of trim or a B dimension of
41.57 (|0.05) inches (Ref 27-41-00/501).
S 864-007
(2) Make sure that the Mach trim actuator is in the null position.
NOTE: The actuator is in the null position when the voltage
____ between the J6-37 and J6-1 in the FCC test connector is below 50 mvdc.
S 424-008
(3) Do these steps to install the sensor:
(a)
Align the index mark on the sensor housing with the index mark on the sensor shaft.
(b)
Install the sensor in the sensor clamp.
(c)
Align the index mark on the sensor with the index mark on the sensor clamp.
NOTE: Make sure the index mark on the sensor shaft points
____
up.
(d)
Install the bolt, washer, and nut on the sensor clamp.
(e)
Tighten the bolt in the sensor clamp 8-12 pound-inches.
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737-300/400/500MAINTENANCE MANUAL
WARNING: MAKE SURE YOU TURN THE NEUTRAL SHIFT CRANK IN THE UP
_______ DIRECTION. IF YOU INSTALL THE NEUTRAL SHIFT CRANK INCORRECTLY, THE STABILIZER CAN MOVE QUICKLY WHEN YOU ENGAGE THE AUTOPILOT. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(f) Install the crank arm on the sensor shaft.
NOTE: Do not move the position of the sensor while you
____
install the crank arm.
(g)
Align the index mark on the sensor shaft with the centerline of the crank arm.
(h)
Install the bolt, washer, and nut on the crank arm.
(i)
Tighten the bolt in the crank arm.
S 864-009
(4) Close these circuit breakers and remove the DO-NOT-CLOSE tags:
(a)
P6 Circuit Breaker Panel
1) AUTO FLT CONT SYS B MACH TRIM AC
2) AUTO FLT CONT SYS B MACH TRIM DC
3) AFDS MCP CRS-2
4) AUTO FLT CONT SYS B SNSR EXC AC
5) AUTO FLT CONT SYS B FCC DC
6) AUTO FLT CONT SYS B ENGAGE INTLK B
7) AUTO FLT CONT SYS B WARN LIGHT BAT
(b)
P18 Circuit Breaker Panel
1) AUTO FLT CONT SYS A MACH TRIM AC
2) AUTO FLT CONT SYS A MACH TRIM DC
3) AFDS MCP DC
4) Airplanes with mechanical aileron force limiter:
AFDS AIL FORCE LIM
5) AUTO FLT CONT SYS A SNSR EXC AC
6) AUTO FLT CONT SYS A FCC DC
7) AUTO FLT CONT SYS A ENGAGE INTLK A
8) AUTO FLT CONT SYS A WARN LIGHT BAT
S 824-010
(5)
Adjust the elevator neutral shift sensor (AMM 22-11-14/501).
(6)
Install the 3802 access door on the tail cone (Ref 12-31-41/201).
S 414-011
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A
737-300/400/500MAINTENANCE MANUAL
ELEVATOR NEUTRAL SHIFT SENSOR - ADJUSTMENT/TEST
_______________________________________________
1. General_______
A. This procedure contains three tasks. The first two tasks are for the adjustment of the elevator neutral shift sensor. In the first task, you use the F80217-139 test set to do the adjustment. In the second task, you use the DFCS BITE (airplanes with -912 and on FCC) to do the adjustment. You can use one of these tasks to do the adjustment. The third task is the elevator neutral shift sensor test.
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