S 864-009

 (4)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  P6 Load Control Center - Right
 1) LEVER LATCH AND PRESS WARN
 2) AURAL WARN

 (5)
Connect the vacuum source to the vent port of the switch.

 S 714-011

 (6)  
Do this test for the switch:

 S 484-010
 (a)  Operate the vacuum to approximately 5 psi (10 psia). 1) Make sure you hear the intermittent warning horn.
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737-300/400/500MAINTENANCE MANUAL
 (b)  Push the switch for the ALTITUDE HORN CUTOUT on the forward overhead panel (P5). 1) Make sure the warning horn stops.
 S 714-012
 (7)  Do this task: "Cabin Altitude Warning Switch Test" (Ref 31-26-00/501).
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 AURAL WARNING MODULE ASSEMBLY - REMOVAL/INSTALLATION
____________________________________________________
 1.  General_______
 A.  This procedure has two tasks. The tasks are a removal and an installation of the aural warning module assembly (M315).
 TASK 31-26-41-004-014
 2.  Aural Warning Module Assembly Removal_____________________________________
 A.  Access
 (1)  Location Zones
 101/102 Control Cabin

 B.  Procedure
 S 864-002
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  
P6 Load Control Center - Right 1) MASTER WARNING AND CONTROL 2) AURAL WARN 3) AURAL MACH AND AIRSPEED WARNING

 (b)  
P18 Load Control Center - Left 1) AURAL MACH AND AIRSPEED WARNING

 S 024-004
 (2)  Remove the module:
 (a)  
Disconnect the electrical plugs.

 (b)  
Remove the attachment fasteners.

 (c)  
Remove the module.

 TASK 31-26-41-404-015
 3.  Aural Warning Module Assembly Installation__________________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 31-26-00/501, Aural Warning System

 B.  Access
 (1)  Location Zones
 101/102 Control Cabin

 C.  Procedure
 S 424-006
 (1)  Install the module:
 (a)  
Put the module on the Forward Section Control Stand.

 (b)  
Attach the fasteners.

 (c)  
Connect the electrical connector to the module.

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A 737-300/400/500MAINTENANCE MANUAL

FWD
AURAL WARNING MODULE

Aural Warning Module Installation

Figure 401

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A 737-300/400/500MAINTENANCE MANUAL
 S 864-008
 (2)  Supply electrical power (AMM 24-22-00/201).
 S 864-009
 (3)  Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P6 Load Control Center - Right 1) MASTER WARNING AND CONTROL 2) AURAL WARN 3) MACH WARN SYS - 2 (b) P18 Load Control Center - Left 1) MACH WARN SYS - 1
　
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