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A
747-400
FAULT ISOLATION/MAINT MANUAL
MAIN EQUIPMENT
CENTER BODY LANDING GEAR AND AFT WHEEL WELL
COMMAND SEE D
TRANSDUCER, T163
SEE C
ELECTRONIC
CONTROL UNIT,
ACCESS PANEL X400
(REF) LEFT SEE E SHT 3
BODY GEAR
CONTROL
CABLE MODULE
COMPENSATOR ASSEMBLY
(REF)
SEE F SHT 3
COMMAND STEERING
TRANSDUCER, T163 ACTUATORS
INBD SEE G SHT 3
BODY LANDING GEAR
FWD
COMMAND TRANSDUCER, T163 AND AFT WHEEL WELL CD
Body Gear Steering System - Component Location Figure 102 (Sheet 2)
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747-400 FAULT ISOLATION/MAINT MANUAL
L OR R
L OR R
SOLENOID
CHECK
VALVE,
VALVE
YK6V01
L OR R SERVO VALVE, YK6V02
L OR R ELECTRONIC FWD
L OR R CONTROL UNIT, SWITCH, PRESSURE
FILTER X400
YK6S01
ELECTRONIC CONTROL UNIT, X400
E FROM SHT 2 L OR R CONTROL MODULE ASSEMBLY
YOKE ASSEMBLY F FROM SHT 2
SHOCK
STRUT
(REF)
PRIMARY ACTUATOR STEERING LOCK SWITCH, YIT501 ACTUATORS
PRIMARY, ALTERNATE ACTUATOR LOCK SWITCHES, YIT501, YIT502
SEE H ALTERNATE ACTUATOR LOCK SWITCH, YIT502
FWD FWD
STEERING BODY
ACTUATOR GEAR
TRUCK
ACTUATOR LOCK SWITCHES STEERING ACTUATOR H G FROM SHT 2
Body Gear Steering System - Component Location
Figure 102 (Sheet 3)
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747-400 MAINTENANCE MANUAL
BODY GEAR STEERING SYSTEM - ADJUSTMENT/TEST
___________________________________________
1. General_______
A. This subject contains one task. The task is a system test of the body gear steering system.
B. The body gear steering system test does a check of the body gear steering indication system, steering actuator interlock operation, landing gear control handle lockout solenoid, body gear centering operation, body gear steering actuator operation, and continuity of the body gear steering actuator axial feedback transducer.
TASK 32-53-00-705-001
2. Body Gear Steering System Test______________________________
A. Special Tools and Equipment
(1)
A32102-25 - Proximity Sensor Set - Actuators
B.
Standard Tools and Equipment
(1)
Ohmmeter
(2)
Measuring device (12-inch rule or equivalent)
C.
References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-11-00/201, Main Hydraulic Supply System
(4)
AMM 32-00-30/201, Landing Gear Door Locks
(5)
AMM 32-21-03/201, Nose Gear Torsion Links
(6)
AMM 32-53-11/201, Body Gear Steering Actuators and Yoke Assembly
(7)
SSM 32-53-01, 32-53-02
(8)
WDM 32-53-12, 32-53-13
D.
Access
(1)
Location Zone
715 Nose Landing Gear
755 Body Landing Gear, LH
765 Body Landing Gear, RH
E.
Preconditions
(1)
These conditions are necessary for this task:
S 865-103
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