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Stall Warning Module
 1)  Two Stall Warning modules are installed. The left module provides the captain's warning signals and the right one the first officer's warning signals. The modules are each microprocessor controlled. Refer to AMM 27-32-00 for a detailed description of the Stall Warning modules.
WEU BITE Module
 1)  The WEU BITE module provides fault indications for the two power supplies and the two Stall Warning computers. Refer to AMM 27-32-00 for a detailed description of the WEU BITE module.
Takeoff Configuration Warning Module
 1)  The Takeoff Configuration Warning module provides warning signals for improper airplane configuration during takeoff.
Landing Configuration Warning Module
 1)  The Landing Configuration Warning module is microprocessor controlled. It provides warning signals for improper airplane configuration during landing. The Landing Configuration Warning module also provides speedbrake caution signals.
Altitude Alert Module
 1)  The Altitude Alert module is microprocessor controlled. It provides altitude acquisition advisory and deviation cautions. Refer to AMM 34-16-00 for a detailed description of the Altitude Alert module.
Master Warning Module
 1)  The Master Warning module is microprocessor controlled and provides the warning signals to turn on the Master Warning lights.
Bell/Chime Aural Warning Module
 1)  The Bell/Chime Aural Warning module provides fire bell warning and crew call chime signals to the audio amplifiers in the Siren/Owl Aural Warning modules.
Siren/Owl Aural Warning Module
 1)  The left and right Siren/Owl Aural Warning modules supply level A warning and level B caution signals.
 2)  The siren warning is activated by autopilot disconnect, overspeed, cabin altitude exceedance, T/O configuration warnings, and landing configuration warnings.
 3)  The owl warning is activated by level B EICAS messages and altitude alert.
 4)  The siren/owl modules also supply amplification of the bell/chime warnings and ground proximity voice.
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 5)  AIRPLANES WITH TCAS; The Siren/Owl modules also amplify voice messages received from the TCAS.
Configuration Warning Test Switch
 (1)  
The configuration warning test switch is located on the miscellaneous test panel on the right side panel. It is a two-position, spring loaded switch. The T/O position is for testing the takeoff configuration warning circuits. The LDG position is for testing the landing configuration warning circuits.

GND PROX/CONFIG GEAR OVRD Switch

 (1)  
The GND PROX/CONFIG GEAR OVRD switch is located on the first officer's instrument panel. It is an alternate action light switch. The switch cancels the landing configuration aural warning and displays the amber OVRD message when pressed.
　
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