JACKSCREW
SWITCH
UPPER SWITCH
(AIRPLANE NOSE
DOWN)
(S546)

LOWER SWITCH
(AIRPLANE NOSE
UP)
(S132)

UPPER STABILIZER TAKEOFF WARNING SWITCH (AIRPLANE NOSE DOWN) (S546)
LOWER STABILIZER TAKEOFF WARNING SWITCH (AIRPLANE NOSE UP) (S132) (SEE TABLE 1)
DIMENSION B
TRAMMEL BAR
GIMBAL
POINT

D
DIMENSION B
DIMENSION B
FOR SOUND FROM HORN

FOR SWITCH ADJUSTMENT
44.76-44.08 INCHES 44.42 |0.05 INCHES
37.18-36.50 INCHES 36.84 |0.05 INCHES
TABLE 1
Takeoff Warning System Adjustment Figure 502 (Sheet 3)
C97446
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A 737-300/400/500MAINTENANCE MANUAL
INDICATOR PLATE
SPEEDBRAKE LEVER
SEE F (S651) WARNING SWITCH SPEEDBRAKE TAKEOFF  CONTROL STAND  SWITCH COVER 
SPEEDBRAKE TAKEOFF WARNING SWITCH 
E 

SPEEDBRAKE
LEVER
LEVER DOWN AND ACTUATOR LEVER LOCKED DETENT
SWITCH
ACTUATOR SPEEDBRAKE TAKEOFF WARNING
INDICATOR SWITCH (S651)PLATE SWITCH ATTACHMENT STUD (IN SLOTTED HOLE)
SWITCH ATTACHMENT SCREW
CONTROL STAND
F
Takeoff Warning System Adjustment Figure 502 (Sheet 4)
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A 737-300/400/500MAINTENANCE MANUAL

NO. 4 Flap Jackscrew Positioning
for Flap Takeoff Warning Switch Adjustment
Figure 503

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A
737-300/400/500MAINTENANCE MANUAL
 D.  Procedure
 S 865-173
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-174

 (2)  
Do one of these steps:

 (a)  
Make sure the flap control lever is outside of the takeoff range.

 (b)  
Make sure the speedbrake handle is not in the down detent position.

 (c)  
Make sure the stabilizer is out of the green band range.

 (d)  
Make sure the leading edge flaps are not extended.

 (e)  
Make sure the parking brake is set.

 S 715-175
 (3)  Do the operational test of the aural warning module:
 (a)  
Move the thrust levers to the takeoff position. 1) Make sure you hear the warning horn.

 (b)  
Move the thrust levers to the idle position. 1) Make sure the warning horn stops.

 S 865-176
 (4)  Remove electrical power if it is not necessary (AMM 24-22-00/201).
 TASK 31-26-00-745-297
 3.  AIRPLANES WITH 69-78214 SERIES AURAL WARNING MODULE; Aural Warning Module BITE_________________________
 A.  General
 (1)  The BITE is an operational check of the two channels in the aural warning module. Channel A and channel B need to be tested separately. Failure of the BITE indicate failure of the module.
 B.  References
 (1)  AMM 24-22-00/201, Manual Control
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A
737-300/400/500MAINTENANCE MANUAL
 C. Access
 (1)  Location Zones
 101/102 Flight Compartment
　
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