C.
The procedure to remove, install, test, and adjust the primary and the alternate sensors is the same.
D.
It is usually not necessary to lift the airplane with jacks when you remove, install or do a test of the sensors. If the shims, the target, or the bracket have not been removed or damaged, then no sensor adjustment is necessary. But if the shims, the target, or the bracket have been replaced or damaged, then the sensor must be checked and adjusted.
E.
It is necessary to lift the airplane on jacks when you adjust the clearance for the sensor and target. You must do a check of the clearance with the truck tilted. When you adjust the clearance between the sensor and the target, you remove the shim laminations to get the correct clearance.
TASK 32-61-12-002-001
2. Remove the Truck Tilt Sensor____________________________
A. Standard Tools
(1)
Plastic Scraper, that is not abrasive, that is not a conductor
B.
References
(1)
09-11-00/201, Towing
(2)
32-00-30/201, Landing Gear Door Locks
(3)
32-09-02/201, Air/Ground Relay System
(4)
IPC 32-61-12 Fig. 1
C.
Access
(1)
Location Zone
755 Body Landing Gear, LH
765 Body Landing Gear, RH
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747-400 MAINTENANCE MANUAL
D. Prepare for the Removal
S 432-029
WARNING: MAKE SURE THE GROUND LOCKS ARE INSTALLED ON THE NOSE AND MAIN
_______ LANDING GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1) Make sure the ground locks are installed on the nose and main landing gear (Ref 09-11-00/201).
S 432-030
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.
(2) Install the door locks for the main landing gear (Ref 32-00-30/201).
S 042-034
WARNING: MAKE SURE YOU PREPARE THE AIRPLANE FOR THE AIR MODE, BEFORE YOU
_______ OPEN THE CIRCUIT BREAKERS THAT FOLLOW. THE AUTOMATIC OPERATION OF THE AIRPLANE SYSTEMS IN THE AIR MODE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3)
Do this task: Prepare the Safety-Sensitive Systems for Air Mode Simulation (Ref 32-09-02/201).
S 862-005
(4)
For the alternate sensor removal, open this circuit breaker on the overhead circuit breaker panel, P7, and attach a DO-NOT-CLOSE tag:
(a)
7F23, LANDING GEAR DSP & CONT ALTN
S 862-006
(5)
For the primary sensor removal, open this circuit breaker on the overhead circuit breaker panel, P7, and attach a DO-NOT-CLOSE tag:
(a)
7F22, LANDING GEAR DSP & CONT PRI
E.
Remove the Truck Tilt Sensor (Fig. 201)
S 022-031
(1)
Do these steps to remove the truck tilt sensor for the body landing gear:
(a)
Remove the cover from the junction box (J67 LH, J68 RH).
(b)
Disconnect the sensor wires as follows:
1) Remove the sealant material from the electrical terminals with the plastic scraper.
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747-400
MAINTENANCE MANUAL
SHOCK STRUT
FWD
TORSION LINK
SEE A
Installation of the Truck Tilt Sensor for the Body Landing Gear
Figure 201 (Sheet 1) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 9(90)
