(2)  
AMM 20-10-44/401, Lockwire

 (3)  
27-11-00/201, Aileron and Aileron Trim Control System

 (4)  
27-31-00/201, Elevator and Tab Control System

 (5)  
32-00-01/201, Ground Lock Assemblies

 (6)  
52-49-31/201, Tire Burst Protection Screen Doors

 C.  Access
 (1)  
Location Zone
 216 Left Main Wheel Well
 705 Tail Cone Access Door

 (2)  
Access Panel
 3802 Tail Cone Access Door

 D.  Procedure
 S 864-019
 (1)  Remove the hydraulic pressure from the applicable hydraulic systems A and B (Ref 27-11-00/201) and (Ref 27-31-00/201).
 NOTE: Aileron hydraulic systems A and B (Ref 27-11-00/201).
____ Elevator hydraulic systems A and B (Ref 27-31-00/201).
 S 864-002
 (2) 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
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 22-11-12
 ALL  ú ú 01 Page 401 ú Nov 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
ACTUATORS AILERON A/P 
VERTICALLY) HOWEVER INSTALLED (SIMILAR TO AILERON, ELEVATOR A/P ACTUATORS 
SEE  A 
SEAL PLATE (GASKET)  VALVE SOLENOID ACTUATOR ACTUATOR B A/P VALVE TRANSFER SWITCH PRESSURE (GASKET) SEAL PLATE  VALVE SOLENOID DETENT  VALVE SOLENOID ACTUATOR SEAL PLATE (GASKET) 
VALVE TYPICAL  (TOP OF ACTUATOR) TRANSFER VALVE 
O-RING 
VALVE SOLENOID DETENT  SWITCH PRESSURE 
A/P ACTUATOR A 
(FRONT VIEW) FWD BULKHEAD MAIN WHEELWELL 

A

Solenoid and Transfer Valve Installation
Figure 401

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 22-11-12
 ALL  ú ú 02 Page 402 ú Jul 15/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 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 494-015
 (3) Do these steps to get access to the A/P aileron actuators.
 (a)  
Install the downlocks on the main landing gear (Ref 32-00-01/201).

 (b)  
Make sure the screen doors (if installed) for the tire burst protection are open (Ref 52-49-31/201).

 (c)  
Remove the 3802 access door on the tail cone to get access to the A/P elevator actuators (Ref 12-31-41/201).

 S 024-004
 (4)  Do these steps to remove the valves:
 (a)  
Remove the lockwire from the mounting bolts.

 (b)  
Remove the mounting bolts.

 (c)  
Remove the valve.

 (d)  
Remove the seal plate.

 (e)  
Remove the O-ring from the valve

 (f)  
Put the covers on the actuator openings.

 TASK 22-11-12-404-017
 3. Install the valve
__________________
 A. Consumable Materials
 (1)  D00148 FLuid - Hydraulic, Fire Resistant, BMS 3-11, Type IV Class 1
 B. References
 (1)  
AMM 20-10-44/401, Lockwire

 (2)  
27-11-00/201, Aileron and Aileron Trim Control System

 (3)  
27-31-00/201, Elevator and Tab Control System

 (4)  
24-22-00/201, Manual Control

 (5)  
29-15-00/201, Hydraulic Systems A, B, and Standby

 (6)  
22-11-12/501, A/P Actuator Solinoid and Transfer Valves
　
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