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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

03/30/21

Message Overview:

Message Name:

AUDIO INHIBIT DISCR FAIL

Message Code:

B3-223951

Associated CAS:

None

Reporting LRU: TAWS MARK VIII
System Description: 34-42-00
Schematic Diagram: 34-42-00
Wiring Diagram: 34-42-01

Message Description:

Audio inhibit discrete input failed.

Possible Causes:

  • Terrain-Avoidance Warning System (TAWS) Computer (A34)
  • Audio Inhibit Switch
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 17
  2. {Term Definitions}

    1. TAWS1-13 XX 355 00 EXCT XXXX-XXXX XXXX-XXTX XXXX-XXXX 355: 18;AUDIO INHIBIT DISCR INPUT

Quick Links:

Removal of the Weather Radar Receiver/Transmitter and Antenna AMM 34-41-01-000-801
Installation of the Weather Radar Receiver/Transmitter and Antenna AMM 34-41-01-400-801
Removal of the Terrain-Avoidance Warning System (TAWS) Computer AMM 34-42-01-000-802
Installation of the Terrain-Avoidance Warning System (TAWS) Computer AMM 34-42-01-400-802
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Audio inhibit discrete input failed. Check to see if Audio Inhibit Switch is stuck.

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