(e)  Tighten the bolt hand tight and install the quick-release pin.
 (4)  S 414-031Install left forward left ceiling panel in the passenger compartment.
 (5)  S 864-032Remove the electrical power if it is not necessary (AMM 24-22-00/201).

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747-400 MAINTENANCE MANUAL
 BODY GEAR STEERING ACTUATOR LOCK SWITCH - REMOVAL/INSTALLATION
______________________________________________________________
 1.  General_______
 A.  This procedure removes and installs the lock switch of the steering actuator of the body landing gear.
 TASK 32-53-16-004-001
 2.  Body Gear Steering Actuator Lock Switch Removal_______________________________________________
 A.  References
 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
IPC 32-53-11 Fig. 5

 B.  
Access

 (1)  
Location Zone
 755 Body Landing Gear, LH
 765 Body Landing Gear, RH

 C.  
Prepare for Removal

 S 494-002
 (1)  Make sure that you install the ground locks of the landing gear (AMM 09-11-00/201).
 S 494-003
 WARNING: REFER TO AMM 32-00-30/201 FOR THE LOCK INSTALLATION PROCEDURE.
_______ THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Install the door locks of the wing and the body landing gear (AMM 32-00-30/201).

 (3)
Remove the hydraulic power of system No. 1 (AMM 29-11-00/201).

 S 864-004
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747-400 MAINTENANCE MANUAL
 S 864-005
 (4)  
Open the 7G23 BODY GR STRG ARM AC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 864-006

 (5)  
Open the 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.

 D.
Actuator Lock Switch Removal (Fig. 401)

 S 024-007
 (1)  
Remove the lock switch.

 (a)  
Remove the two screws that attach the connector.

 CAUTION:_______REPLACE ONLY ONE SWITCH AT A TIME. THE SWITCH ACTUATING PLUNGERS ARE SPRING LOADED. REMOVAL OF THE TWO SWITCHES AT THE SAME TIME WILL MOVE THE LINEAR TRANSDUCER OUT OF ITS POSITION. YOU WILL NEED A SPECIAL ASSEMBLY TOOL TO INSTALL THE LINEAR TRANSDUCER.

 (b)  
Sufficiently loosen the locknut to remove the tab of the lockwasher from the locking hole.

 (c)  
Remove the switch, the wiring and the connector that is attached to it.

 (d)  
Remove the O-ring from the connector and discard.

 TASK 32-53-16-404-008
 3.  Body Gear Steering Actuator Lock Switch Installation____________________________________________________
 A. General
 (1)  The table that follows contains port/label and bit data. This information is necessary when you do a test of the lock switches on the steering actuators for the body landing gear.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

SEEA
FWD
PRIMARY LOCK SWITCH
LOCK SWITCH ALTERNATE
CONNECTOR LOCK SWITCH
BODY GEAR STEERING ACTUATOR
　
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