S 864-022
(2)
Make sure the 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel is open.
S 214-012
(3)
Push and hold test button S1 on the electronic control unit and make sure the test indicator light is off.
S 214-013
(4)
Hold the test button S1 down, push the button S2 and make sure the test indicator light is off.
S 214-014
(5)
Hold button S2 down, release button S1 and make sure the test indicator light is off.
S 864-015
(6)
Release button S2.
S 864-016
(7)
Close 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.
(8)
Push button S1 and make sure that the test indicator light is off.
S 214-018
(9)
Hold button S1 down, push button S2 and make sure that the test indicator light is on.
S 214-019
(10)
Hold button S2 down , release button S1 and make sure that the test indicator light is off.
(11)
Release button S2
S 214-017
S 864-020
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32-53-03
ALL ú ú 01 Page 404 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 094-021
WARNING:_______REFER TO AMM 32-00-30/201 FOR THE LOCK REMOVAL PROCEDURE. THE FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(12) Remove the door locks of the main gear (AMM 32-00-30/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-53-03
ALL ú ú 01 Page 405 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
BODY GEAR STEERING CONTROL MODULE ASSEMBLY - REMOVAL/INSTALLATION
_________________________________________________________________
1. General_______
A. This procedure has these two tasks:
(1)
Removal of the control module assembly for the body gear steering.
(2)
Installation of the control module assembly for the body gear steering.
B.
You can do a test of the module after replacement to make sure the actuator for the body gear steering operates correctly. Taxi the airplane to put the actuator in the position for the test. It is not necessary to disconnect the torsion link on the nose landing gear if you taxi the airplane to put the actuator in its position (Ref 09-21-00/201).
C.
To remove the control module these steps are necessary:
-
Disconnect the electrical connectors
-
Disconnect the hydraulic lines
-
Remove the washers and nuts and remove the module.
D.
To install the control module these steps are necessary:
-If it is necessary, install new O-rings and backup rings
-Put the module in its position and install the washers and nuts
-
Connect the hydraulic lines to the module
-
Connect the electrical connectors to the module
-Do a test of the control module.
TASK 32-53-04-004-001
2. Remove the Control Module for the Body Gear Steering____________________________________________________
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 32-53-51 Fig. 1
(5)
SSM 32-53-01, 32-53-02
(6)
WDM 32-53-11, 32-53-12, 32-53-13
B.
Access
(1)
Location Zones
755 Body Landing Gear, LH
765 Body Landing Gear, RH
C.
Prepare for the Removal
S 864-002
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