(2)
AURAL WARNING

 (3)
LANDING GEAR LIGHTS

 (4)
LEVER LATCH AND PRESS WARN

 (5)
ENGINE MASTER CAUTION

 (6)
NO. 1 ENGINE T/R

 (7)
NO. 2 ENGINE T/R

 (8)
LEADING EDGE FLAP POS IND

 2.  Trouble Shooting Charts_______________________
 A.  Look for the trouble symptom in the charts and do the applicable corrective procedure.
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 31-26-00
 ALL  ú ú 01 Page 101 ú Mar 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
TROUBLE SYMPTOM  PROBABLE CAUSE  CORRECTIVE PROCEDURE 
You hear a continuous sound from the horn when all of these conditions occur: The landing gear is down and locked The flaps are in the landing position The thrust levers are set more than 30` above idle. . . . occur: when all of these conditions uous sound from the horn You do not hear a contin-less than 30` above idle. The thrust levers are set landing position The flaps are in the . The landing gear is up . . You do not hear a contin-when all of these conditions occur: The thrust levers are set . The landing gear is up . . The flaps are not fully up less than 30` above idle. You do not hear a contin-uous sound from the horn uous sound from the horn when the landing gear is up and the flap and thrust levers are at any position.  circuit circuit gear warning circuit warning circuit or a failure in the horn A failure in the control input to the horn circuit The flap/landing gear A failure in the horn The thrust lever landing circuit or a failure in the control input to the horn  Replace the aural M315 (WDM 31-26-01). Replace the aural Replace the aural 1. 2. 2. warning logic card, M989 warning logic card, M989 warning devices unit, M315 (WDM 31-26-01). warning devices unit, Do the procedure in paragrah 3. Do the procedure in paragraph 4. Replace the aural1. (Ref 32-09-2X/401). (Ref 32-09-2X/401). 

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 31-26-00
 ALL  ú ú 01 Page 102 ú Mar 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
TROUBLE SYMPTOM  PROBABLE CAUSE  CORRECTIVE PROCEDURE 
. . takeoff position. speed brakes are not in the The stabilizer, flaps and more than 33` above idle The No. 1 thrust lever is set these conditions occur: sound from the horn when all of You do not hear an intermittent . . the takeoff position. The speed brakes are not in more than 33` above idle The thrust levers are set these conditions occur: sound from the horn when all of You do not hear an intermittent . . takeoff position. The flaps are not in the more than 33` above idle The thrust levers are set these conditions occur: sound from the horn when all of You do not hear an intermittent You do not hear an intermittent . . takeoff position. The stabilizer is not in the more than 33` above idle The thrust levers are set of these conditions occur: sound from the horn when all . . takeoff position. The stabilizer, flaps, and more than 33` above idle The thrust levers are set these conditions occur: sound from the horn when all of You do not hear an intermittent speed brakes are not in the  thrust lever switch A failure in the A failure in the speed brake takeoff A failure in the flap takeoff warning A failure in the top takeoff warning or bottom stabilizer A failure in the horn trol input to the circuit or no con-horn circuit switch switch warning switch or circuit  M989 (Ref 32-09-2X/401). paragraph 5. Do the procedure in Adjust or replace the speed (Ref 31-26-26/401). switch, S651 brake takeoff warning Adjust or replace the flap S130 (Ref 31-26-23/401). takeoff warning switch, (Ref 31-26-24/401). the APL NOSE UP position the stabilizer was set to bottom switch, S132, if Adjust or replace the APL NOSE DN position. stabilizer was set to the switch, S546, if the Adjust or replace the top 1. warning logic card, 2. M315 (WDM 31-26-01). warning devices unit, Replace the aural Replace the aural 

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