(7)  
12-31-41/201, Body Section 48 Access Doors and Panels

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

 (2)  
Access Panel
 3802 Tail Cone Access Door

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 D. Procedure
 S 424-005
 (1)  Do these steps to install the valve:
 (a)  
Remove the covers from the actuator openings.

 (b)  
Clean the seal plate

 (c)  
Make sure the O-ring is satisfactory.

 (d)  
Replace the O-ring if it is necessary.

 (e)  
Lubricate the O-ring with the hydraulic fluid.

 (f)  
Install the O-ring on the valve.

 (g)  
Put the seal plate in the correct position.

 (h)  
Hold the valve in the position and install the mounting bolts.

 (i)  
Tighten the mounting bolts between 50-70 lb-in.

 (j)  
Install the lockwire (AMM 20-10-44/401).

 E. Do These Tests
 S 864-018
 (1) 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 864-006
 (2)  Supply the electrical power (Ref 24-22-00/201).
 S 864-008
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL
_______ CONTROL SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDER, ELEVATORS, FLAPS, SLATS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (3)  Supply the hydraulic pressure to the applicable 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 724-010
 (4)  
Do the A/P Actuator Solenoid and Transfer Valves Test
 (22-11-12/501)

 S 794-009

 (5)  
Visually examine the valves and make sure that there is no hydraulic leak.

 F. Put the Airplane Back to Its Initial Condition
 S 414-011
 (1)  
Install the screen doors for the tire burst protection if it is necessary (Ref 52-49-31/201).

 S 424-012

 (2)
Install the 3802 access door on the tail cone (Ref 12-31-41/201).

 S 864-013

 (3)  
Remove the electrical power if it is not necessary
 (Ref 24-22-00/201).

 S 864-014

 (4)  
Remove the hydraulic power if it is not necessary
 (Ref 29-15-00/201).

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