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A
737-300/400/500MAINTENANCE MANUAL
 S 585-019
 (8) Lower the airplane and remove the jacks (AMM 07-11-11/201).
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737-300/400/500MAINTENANCE MANUAL
 MAIN GEAR DOWNLOCK SENSOR - REMOVAL/INSTALLATION
________________________________________________
 TASK 32-61-31-004-001
 1.  Remove the Main Gear Downlock Sensor____________________________________
 A. General
 (1)  
The procedure that follows is applicable to the left and the right downlock sensors for the main gear.

 B.
Special Tools and Equipment

 (1)  
Ground Locks - F72735 (AMM 32-00-01/201)

 C.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 32-00-01/201, Gound Locks

 D.
Access

 (1)  
Location Zones
 216 Left Main Wheel Well
 217 Right Main Wheel Well
 310 Left Main Landing Gear
 410 Right Main Landing Gear

 E.
Prepare to Remove the Sensor

 S 864-002
 (1)  
Remove electrical power (AMM 24-22-00/201).

 S 864-003

 (2)  
Open all the circuit breakers for the landing gear on the circuit breaker panel, P6 and attach DO-NOT-CLOSE tags.

 S 864-004

 (3)  
Make sure the ground locks are installed in all the landing gear (AMM 32-00-01/201).

 F.
Remove the Sensor (Fig. 401)

 S 034-005
 (1)  
Do these steps to disconnect the wires for the sensor:

 (a)  
AIRPLANES WITH SPLICES; Disconnect the sensor wires at the splices.

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A 737-300/400/500MAINTENANCE MANUAL
SEE A SENSOR WIRES 
SEE C SENSOR 
SEE BSENSOR WIRES  CONNECTOR ELECTRICAL 
FWD  RESERVOIR SYSTEM B 

ELECTRICAL CONNECTOR INBD FWD
SPOILERWHEEL WELL CONTROLCEILING VALVE
WHEEL WELL FORWARD BULKHEAD
SENSOR WIRES FOR THE RIGHT GEAR
LANDING GEAR VALVE CONTROL
A
ROD
WIRE
BUNDLE

FORWARD
WHEEL WELL

INBD
BULKHEAD
FWD
SENSOR WIRES FOR THE LEFT GEAR
B

Main Gear Downlock Sensor Installation
Figure 401 (Sheet 1)

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737-300/400/500MAINTENANCE MANUAL
1
DSEE ACTUATOR SENSOR  SENSOR  FLEXIBLE CONDUIT  FWD INBD 
C RIGHT GEAR SENSOR EQUIVALENT LEFT GEAR DOWNLOCK SENSOR SHOWN  CLEARANCE -0.000 +0.015 0.085  INCH  SENSORBOLT MOUNTING 
ACTUATOR SENSOR 
FWD 
1  ON SOME AIRPLANES, THE SPLICES FOR THE SENSOR WIRING ARE 4 TO 12 INCHES BEYOND THE END OF THE CONDUIT. D Main Gear Downlock Sensor Installation Figure 401 (Sheet 2) 

H53597
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