B.
References
(1)
AMM 09-11-00/201, Towing
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747-400
MAINTENANCE MANUAL
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
AMM 32-09-02/201, Air/Ground Relay System
(4)
AMM 32-61-00/501, Landing Gear Position Indication System
(5)
IPC 32-61-08 Fig. 12
C.
Access
(1)
Location Zone
715 Nose Landing Gear
D.
Prepare for the Adjustment
S 492-078
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Make sure the ground locks are installed (AMM 09-11-00/201).
S 492-079
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE STEERING LOCKOUT PIN. THE NOSE WHEEL CAN ACCIDENTALLY TURN AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Make sure the steering lockout pin is installed (AMM 09-11-00/201).
S 492-080
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3) Install the door lock on the nose gear (AMM 32-00-30/201).
S 042-081
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO PUT THE
_______ AIR/GROUND RELAY SYSTEM IN THE AIR MODE. A FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE THE AUTOMATIC OPERATION OF AIRPLANE SYSTEMS. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(4)
Prepare the airplane for the air mode (AMM 32-09-02/201).
E.
Adjust the Lock Sensor
S 492-084
(1) Make sure the distance between the sensor (2) and upper drag strut is correct.
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S 822-085
(2)
If the clearance is less than shown in Fig./201, then do these steps to adjust the clearance:
(a)
Remove the bolts, nuts, and washers which hold the bracket in place.
(b)
Install shims as necessary to get the correct clearance between the sensor and the upper drag strut.
(c)
Remove laminations from the shim to adjust the clearance.
(d)
Bond the shim to the bracket assembly with the sealant.
(e)
Install the bracket with bolts, washers, and nuts.
S 742-090
(3)
Measure the sensor clearance between the sensor and target. If the clearance is not per figure 201, then do the task to adjust the nose gear lock sensor.
S 442-089
(4)
Do the task to Put Safety-Sensitive Systems Back to the Condition Before Air Mode Simulation (AMM 32-09-02/201).
S 092-091
WARNING:_______OBEY THE REMOVAL PROCEDURE FOR THE DOOR LOCKS. THE DOOR OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(5) Remove the door lock from the nose gear (AMM 32-00-30/201).
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