S 865-004

 (3)  
Close these circuit breakers:

 (a)  
P6-2 Circuit Breaker Panel
 1) AFCS B SNSR EXC AC
 2) AFCS B FCC DC
 3) AFCS ENGAGE INTLK B
 4) AFCS B WARN LIGHT BAT
 5) AFCS B MACH TRIM AC
 6) AFCS B MACH TRIM DC

 (b)  
P18-1 Circuit Breaker Panel
 1) AFDS MCP DC
 2) AFCS A SNSR EXC AC
 3) AFCS A FCC DC
 4) AFCS ENGAGE INTLK A

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A 737-300/400/500MAINTENANCE MANUAL
 5) 6) 7)  AFCS A WARN LIGHT BATAFCS A MACH TRIM ACAFCS A MACH TRIM DC
 (4)  S 715-005Do the autopilot disengage switch test: (a) Engage the autopilot channel A or B in the CMD mode. (b) Make sure that the autopilot is engaged. (c) Push the autopilot disengage switch. (d) Make sure that the autopilot is disengaged and the A/P warning lights flash. (e) Push the A/P warning lights.
 (5)  S 865-007Remove hydraulic power if it is not necessary (Ref 29-15-00/201).
 (6)  S 865-006Remove electrical power if it is not necessary (Ref 24-22-00/201).

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A
737-300/400/500MAINTENANCE MANUAL
 AUTOPILOT STABILIZER TRIM SERVO - REMOVAL/INSTALLATION
______________________________________________________
 1.  General________
 A.  This procedure contains two tasks. The first task is for the removal of the autopilot stabilizer trim servo. The second task is for the installation of the autopilot stabilizer trim servo.
 B.  You can find one autopilot stabilizer trim servo in the tail cone area. You can get access to this autopilot stabalizer trim servo through the 3701L stabilizer trim access panel.
 TASK 22-11-81-004-001
 2.  Autopilot Stabilizer Trim Servo Removal (Fig. 401)_______________________________________
 A.  References
 (1)  12-31-41/201, Body Section 48 Access Doors and Panels
 B.  Access
 (1)  
Location Zone
 705 Tail Cone

 (2)  
Access Panel
 3701L Stabilizer Trim Access Panel

 C.  Procedure
 S 864-002
 (1) Open these circuit breakers and attach 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 014-003
 (2)  Remove the 3701L stabilizer trim access panel (Ref 12-31-41/201).
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A 737-300/400/500MAINTENANCE MANUAL
JACKSCREW STABILIZER
(3 PLACES) MOUNTING BOLT  TRIM SERVO MAIN ELECTRIC  SEE  A 
CONNECTOR ELECTRICAL  TRIM SERVO AUTOPILOT  TRIM SERVO AUTOPILOT 
DRUM DRIVE CABLE MANUAL TRIM 

A
Autopilot Stabilizer Trim Servo Installation Figure 401
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