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A 737-300/400/500MAINTENANCE MANUAL
TROUBLE SYMPTOM PROBABLE CAUSE CORRECTIVE PROCEDURE
. . takeoff position. speed brakes are in the The stabilizer, flaps and more than 33` above idle The thrust levers are set conditions occur: from the horn when all of these You hear an intermittent sound . . takeoff position. speed brakes are in the The stabilizer, flaps and more than 33` above idle The thrust levers are not set conditions occur: from the horn when all of these You hear an intermittent sound . The No. 2 thrust lever is set more than 33` above idle The stabilizer, flaps and speed brakes are not in the takeoff position. . You do not hear an intermittent sound from the horn when all of these conditions occur: A failure in the A failure in the failure in the horn horn circuit or a control input to the A failure in the thrust lever switch or circuit circuit warning switch paragraph 8. paragraph 7. Do the procedure in Do the procedure in Do the procedure in paragraph 6.
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737-300/400/500MAINTENANCE MANUAL
3. ______________________________________________________Flap/Landing Gear Fault Isolation/Corrective Procedure
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737-300/400/500MAINTENANCE MANUAL
4. Thrust Lever/Landing Gear Fault Isolation/Corrective Procedure
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737-300/400/500MAINTENANCE MANUAL
5. Engine No. 1 Thrust Lever Logic Fault Isolation/Corrective Procedure
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737-300/400/500MAINTENANCE MANUAL
6.
Engine No. 2 Thrust Lever Fault Isolation/Corrective Procedure
7.
Horn Circuit Fault Isolation/Corrective Procedure
YOU HEAR THE HORN - Replace the aural warning logic card, M989 (Ref 32-09-2X/ 401). If the problem continues, replace the aural warning device unit, M315 (WDM 31-26-01).
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737-300/400/500MAINTENANCE MANUAL
8. Warning Switch Fault Isolation/Corrective Procedure
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737-300/400/500MAINTENANCE MANUAL
8. Warning Switch Fault Isolation/Corrective Procedure
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