(1)  
Location Zone
 114 Nose Wheel Well, RH (Forward Bulkhead)

 D.  
Prepare for Removal

 S 492-032
 WARNING: MAKE SURE THAT THR GROUND LOCKS ARE INSTALLED IN ALL OF THE
_______ LANDING GEAR. WITHOUT THE GROUND LOCKS, THE LANDING GEAR CAN RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Make sure that all ground locks for the landing gear are installed (AMM 09-11-00/201).
 S 492-003
 WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE GROUND 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 lock for the nose gear door (AMM 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400
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 S 042-028
 WARNING: MAKE SURE THAT YOU HAVE PREPARED THE AIRPLANE FOR THE AIR MODE
_______ BEFORE YOU OPEN THE CIRCUIT BREAKERS. THE AUTOMATIC OPERATION OF THE AIRPLANE SYSTEMS IN THE AIR MODE CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  Do this task: "Prepare Safety-Sensitive Systems for the Air Mode" (Ref 32-09-02/201).
 NOTE:____It is not necessary to do this task: "Put the air/ground relay system in the air mode".
 S 862-005
 (4)  
For the alternate sensor removal, open this circuit breaker on the Overhead Circuit Breaker Panel, P7:

 (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:

 (a)  
7F22 LANDING GEAR DSP & CONT PRI

 E.
Remove the Door Warning Sensor (Fig. 201)

 S 012-007
 (1)  
Remove the cover from the junction box (J26).

 S 022-008

 (2)  
Remove the sensor:

 (a)  
Remove the sealant from the electrical terminals with the scraper.

 (b)  
Write down the terminal and the color of the wire.

 (c)  
Disconnect the sensor leads from the terminal strip (T387).

 (d)  
Remove the terminal lugs from the leads. 1) Be careful to not cause damage to the leads.

 NOTE: The leads can be used again.
____
 (e)  Attach a line to the ends of the sensor wires.
 NOTE: This line will be used during the installation to pull
____ the sensor wires thru the conduit. Make sure the line is longer than the length of the conduit.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A-A
Nose Landing Gear Door Warning Sensor Installation Figure 201
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 (f)  
Remove the sensor mounting screws.

 (g)  
Remove the sensor and pull the electrical leads from the conduit. 1) Do not pull the line out of the conduit.

 (h)  
Remove the mounting bracket if it is damaged.

 TASK 32-61-30-402-009
 3.  Install the Nose Landing Gear Door Warning Sensor_________________________________________________
 A. Special Tools and Equipment
 (1)  
A27092-84 Actuator/Deactuator Set - Proximity Sensors

 B.
Consumable Materials

 (1)  
A00704 Sealant - Silicone, RTV 162

 (2)  
B00083 Solvent - Aliphatic Naphtha, TT-N-95, Type 2
　
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