shown as follows (Fig. 202): ~.............................................................. | Sensor and Bit Location | Bit State | Description | ................................................................ | Left Body Gear Tilt on Bit 19 | 0 | NOT TILTED | ................................................................ | Right Body Gear Tilt on Bit 23 | 0 | NOT TILTED | 2..................................….............….............1

 (c)  
Put the actuator on the applicable sensor, S419, S418 (Primary Tilt Sensor) or S612, S613 (Alternate Tilt Sensor).

 (d)  
Make sure the CDU display for the label 270/00 or 272/00 is

 shown as follows (Fig. 202): ~........................................................... | Sensor and Bit Location | Bit State | Description | ............................................................. | Left Body Gear Tilt on Bit 19 | 1 | TILTED | ............................................................. | Right Body Gear Tilt on Bit 23 | 1 | TILTED | 2.................................…...........….............1

 (e)  
Remove the actuator from the sensor, S419, 418 (Primary Tilt Sensor) or S612, S613 (Alternate Tilt Sensor).

 (f)  
Push the line-select key, adjacent to the <RETURN display until the CDU MENU shown.

 F.
Put the Airplane in Its Usual Condition

 S 092-059
 WARNING:_______OBEY THE REMOVAL 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)  
Remove the door locks for the landing gear and close the doors (AMM 32-00-30/201).

 (2)
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 862-060
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 WING GEAR DOWNLOCK SENSORS - REMOVAL/INSTALLATION
_________________________________________________
 1.  General_______
 A.  This procedure contains two tasks. These tasks remove and install the downlock sensor for the wing landing gear.
 B.  The primary (S399, left and S405, right), and the alternate (S415, left and S412, right) downlock sensors attach to the upper jury strut at the jury strut apex.
 C.  It is not necessary to lift the airplane with a jack. You adjust the clearance between the sensor and the target with the gear in the down position.
 TASK 32-61-20-004-001
 2.  Remove the Downlock Sensor for the Wing Gear____________________________________________
 A.  Standard Tools and Equipment
 (1)
Plastic Scraper - that is not abrasive, that is not a conductor

 B.  
References

 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 32-00-30/201, Landing Gear Door Locks

 (3)  
AMM 32-09-02/201, Air/Ground Relay System

 C.  
Access

 (1)  
Location Zone
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

 D.  
Prepare for the Removal

 (1)  
Install the ground locks in all the landing gear (AMM 09-11-00/201).

 S 494-018
 S 494-019
 WARNING: CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL THE DOOR
_______ LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  Do this task: Installation of the Door Locks on the Wing Landing Gear (AMM 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 494-021
 (3)  Do this task: Installation of the Door Locks on the Body Landing Gear (AMM 32-00-30/201).
 S 044-025
 WARNING: CAREFULLY DO THE STEPS IN TASK BELOW TO PREPARE THE SAFETY-
　
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