(2)  
There are two methods to adjust the air safety sensor. Thepreferred proceedure requires the airplane to be on jacks so that acomplete sensor test may be performed after adjustment.

(3)  
Adjustments of the air safety sensor may be done without jacking theairplane. Complete testing of the sensor requires jacking of theairplane. The complete sensor test must be done at the soonestopportunity.

 B.  
Special Tools and Equipment

 (1)  
Airplane Jacks (AMM 07-11-11/201)

 (2)  
Deactuator - proximity sensor

 (a)  
Material: 5052, 6061, 7075, or 2024 aluminum or sheet copper

 (b)  
Size: For rectangular sensors - 1.5 x 0.75 x 0.05 inches. For round sensors - 1.0 x 1.0 x 0.05 inches.

 (3)  
Ground Locks - F72735 (AMM 32-00-01/201).

 (4)  
Rig Pin SB-3, part of rig pin set - F70207-XX

 (a)  
Rig pin SB-3, 0.311 +0.000/-0.002 inch diameter, 1.5 inches minimum length (MS20392-4)

 NOTE: The rig pin is used for the adjustment of the air safety
____ sensor. It is not necessary for the ground safety sensor.
 C.  References
 (1)  
AMM 07-11-11/201, Jack Airplane

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 29-15-00/201, Hydraulic System A, B, and Standby

 (4)  
AMM 32-00-01/201, Ground Locks

 D.  
Access

 (1)  
Location Zone
 101 Control Cabin
 202 Lower Nose Compartment (E-11 Shelf)
 217 Main Wheel Well, Right Gear
 410 Right Main Landing Gear

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 
737-300/400/500MAINTENANCE MANUAL
 E.  Prepare for the Adjustment
 S 495-003
 (1)  Make sure the ground lockpins are installed all the landing gear
 (AMM 32-00-01/201).
 S 865-004
 (2)  Make sure the hydraulic pressure is removed from all the hydraulic
 systems (AMM 29-15-00/201).
 ú  F.  Adjust the Air Safety Sensor Sensor with the airplane on jacks.  (The
 ú  preferred procedure) (Fig. 501)
 S 585-005
 (1)  Lift the airplane with the jacks until the tires are clear of the
 ground (AMM 07-11-11/201).
 S 495-006
 (2)  Install the rig pin through the yoke of the interlock valve for the
 ground spoiler.
 (a)  Make sure the rig pin can be installed into the hole easily. 

TELEFLEX CABLE
SEEA B
GROUND SPOILER
FWD INBD
INTERLOCK VALVE
RIG PIN SB-3
A
Main Landing Gear Safety Sensors - Adjustment
Figure 501 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
AIR SAFETY SENSOR SENSOR WIRES
MOUNTING BRACKET
TELEFLEX ACTUATORS CABLE
GROUND SAFETY SENSOR
SEE D SEE C
VALVE LINKAGE
GROUND SPOILER INTERLOCK VALVE
FWD MOUNTING
BRACKET B
AIR SAFETY
AIR SAFETY
MOUNTING SENSOR
SENSOR
BRACKET
0.18 |0.02 INCH CLEARANCE
ACTUATOR
0.14 |0.02 INCH CLEARANCE
ACTUATOR
0.30 |0.05 INCH CLEARANCE GROUND SAFETY SENSOR
GROUND 
SAFETY  MOUNTING 
SENSOR  INBD  BRACKET 
FWD

(SHOWN IN GROUND POSITION) CD Main Landing Gear Safety Sensors - Adjustment Figure 501 (Sheet 2)
(SHOWN IN AIR POSITION)
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