TASK 32-61-02-822-025
5. Adjust the Up Sensor for the Nose Gear
______________________________________
NOTE: A correctly installed sensor will give the correct clearance as
____ shown in Fig. 201. The clearance adjustment is usually not necessary after you remove and install the sensor.
A. References
(1)
AMM 07-11-02/201, Jacking Airplane Nose
(2)
AMM 09-11-00/201, Towing
(3)
AMM 20-41-01/201, Static Grounding
(4)
AMM 29-11-00/201, Main Hydraulic Supply System
(5)
AMM 32-00-30/201, Landing Gear Door Locks
(6)
AMM 32-22-03/401, Nose Wheel Well Forward Door Operator Rods
(7)
IPC 32-61-08 Fig. 2
B.
Access
(1)
Location Zone
114 Nose Gear Wheel Well - RH
715 Nose Landing Gear
C.
Prepare for Adjustment
S 492-053
WARNING: MAKE SURE THE GROUND LOCKS AND THE STEERING LOCKOUT PIN ARE
_______ INSTALLED ON THE NOSE GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR OR TURN OF THE NOSE WHEEL CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Make sure the ground locks and steering lockout pin are installed on the nose gear (AMM 09-11-00/201).
S 492-054
(2)
Make sure the ground locks are installed on all the main landing gear (AMM 09-11-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 492-055
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOOR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3)
Install the door locks for the nose and the gear (AMM 32-00-30/201).
D.
Adjust the Up Sensor
S 582-027
(1)
Ground the airplane from the tow lug on the main gear and from the area of the rear cargo door that is not painted to one ground point (AMM 20-41-01/201).
S 582-028
(2)
Lift the airplane nose on jacks to permit gear retraction
(AMM 07-11-02/201).
S 862-029
(3)
Supply power to the No. 1 hydraulic system (AMM 29-11-00/201).
S 032-030
(4)
Remove the operator rods from the door edge brackets on the doors of the forward nose gear.
NOTE: Do not remove the rods from the bellcrank (AMM 32-22-03/401).
____
S 092-056
(5) Remove the ground lock for the nose gear (AMM 09-11-00/201).
S 862-057
WARNING: REMOVE ALL PERSONS AND EQUIPMENT FROM THE AREAS NEAR THE NOSE
_______ LANDING GEAR BEFORE YOU OPERATE THE GEAR. MAKE SURE ALL EXTERNAL POWER CABLES ARE FREE FROM THE NOSE GEAR STRUT BEFORE THE NOSE GEAR RETRACTION. IF YOU DO NOT MAKE A CHECK OF THESE AREAS, THE NOSE GEAR RETRACTION CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(6) Move the control handle for the landing gear to the UP position to retract the landing gear.
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ALL ú ú 02 Page 211 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 862-032
(7) Remove the power to the No. 1 hydraulic system (AMM 29-11-00/201). (a) Attach a DO-NOT-OPERATE tag to these switches on the P5 panel: 1) HYD PUMP DEMAND 1 2) HYD PUMP ENGINE 1
S 862-033
(8) Open this circuit breaker on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tag: (a) 6C28, ALT LG EXT NOSE
S 862-050
(9) Move the control handle for the landing gear to the OFF position and back to the UP position three times. (a) Make sure the nose gear does not move.
S 862-034
(10)
Move the control handle for the landing gear to the OFF position and attach a DO-NOT-OPERATE tag.
