background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults by MDCBy Tips

Select color for CAS message that you wish to troubleshoot

(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.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

03/25/21

Message Overview:

Message Name:

NO TAWS-1 BUS OUTPUT

Message Code:

B3-007994

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:

TAWS-1 bus data absent at L-IOC and R-IOC.

Possible Causes:

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

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 5
  2. Comp Id = A034
  3. {Term Definitions}

    1. TAWS1-1 1X 350 00 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 1X IN
    2. TAWS1-2 2X 350 00 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 2X IN

Quick Links:

Removal of the Input/Output Concentrator Unit (IOC) AMM 31-45-05-000-801
Installation of the Input/Output Concentrator Unit (IOC) AMM 31-45-05-400-801
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. Suspect failed TAWS output or wiring.

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.