32-61-32
 ALL  ú ú 01 Page 201 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 492-028
 (3)  Do this task: "Installation of the Door Locks on the Body Landing Gear" (Ref 32-00-30/201).
 S 042-036
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN TASK BELOW TO PREPARE THE
_______ SAFETY-SENSITIVE SYSTEMS FOR THE AIR MODE. FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE THE AUTOMATIC OPERATION OF AIRPLANE SYSTEMS. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (4)  
Do this task: "Prepare Safety-Sensitive Systems for Air Mode Simulation" (Ref 32-09-02/201).

 S 862-005

 (5)  
For removal of the alternate sensor, open this circuit breaker on the P7 Overhead Circuit Breaker Panel and install a DO-NOT-CLOSE tag:

 (a)  
7F23 LANDING GEAR DSP & CONT ALTN

 S 862-006
 (6)  
For removal of the primary sensor, open this circuit breaker on the P7 Overhead Circuit Breaker Panel and install a DO-NOT-CLOSE tag:

 (a)  
7F22 LANDING GEAR DSP & CONT PRI

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

 S 032-029
 (1)  
Disconnect the electrical wires for the sensor:

 (a)  
Remove the cover from the junction box (J22 left gear, J25 right gear).

 (b)  
Remove the sealant material from the electrical terminals with the plastic scraper.

 (c)  
Make a record of the connection of the wires at the terminal strip.

 NOTE: This will help you during the installation.
____
 (d)  
Disconnect the sensor wires from the terminal strip.

 (e)  
Remove the terminal lugs from the wires.

 (f)  
Attach a line to ends of the leads.

 NOTE: This line will be used to pull the sensor wire through
____ the conduit during the installation. Make sure the line is longer than the length of the conduit.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-61-32
 ALL  ú ú 01 Page 202 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

JUNCTION BOX,
J22 (LEFT),J25 (RIGHT)

TERMINAL STRIP,
T395 (LEFT),T398 (RIGHT)

WING GEAR WHEEL WELL
SENSORS
SEE A  INBOARD DOOR
A

A
MOUNTING BOLT (2 LOCATIONS, EACH SENSOR)
DOOR WARNING SENSOR FOR THE LEFT WING GEAR IS SHOWN, 
DOOR WARNING SENSOR FOR THE RIGHT WING GEAR IS EQUIVALENT 
A 
0.15 |0.03 
INCH CLEARANCE  0.15 |0.03 
1  INCH CLEARANCE 
1 
DOOR WARNING LEFT WING GEAR, S395 (ALTERNATE SENSOR)  DOOR WARNING LEFT WING GEAR, S407 (PRIMARY SENSOR) 
TARGET 
MOUNTING SCREW 
(4 LOCATIONS) 

SHIMS TARGET SHIMS
A-A
MEASURE THE CLEARANCE WITH THE DOOR CLOSED
AND LOCKED AND HYDRAULIC PRESSURE OFF

1
Wing Landing Gear Door Warning Sensor Installation Figure 201
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-61-32
 ALL  ú ú 01 Page 203 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 022-009
 (2)  
Remove the sensor:

 (a)  
Remove the sensor mounting screws.

 (b)  
Remove the sensor and pull the sensor wires from the conduit. 1) Do not pull the line out of the conduit.

 TASK 32-61-32-402-010
 3.  Install the Door Warning Sensors for the Wing Landing Gear__________________________________________________________
 A.  Special Tools and Equipment
 (1)  
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 起落架 LANDING GEAR 9(118)