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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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CRC Montreal (YUL)
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03/26/21

Message Overview:

Message Name:

NO TA/RA-1 BUS OUTPUT

Message Code:

B3-008057

Associated CAS:

None

Reporting LRU: TCAS CH A
System Description: 34-43-00
Schematic Diagram: 34-43-00
Wiring Diagram: 34-43-01

Message Description:

TA/RA-1 bus input absent at L-PFD and L-MFD.

Possible Causes:

  • Traffic Alert and Collision-Avoidance System (TCAS) Transceiver (A5)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 8
  2. Comp Id = A005
  3. {Term Definitions}

    1. PFD1-34 1X 351 NA EXCT XXXX-XXTX XXXX-XXXX XXXX-XXXX 351: 26;NO TA/RA-1 INPUT
    2. MFD1-34 1X 351 NA EXCT XXXX-XXTX XXXX-XXXX XXXX-XXXX 351: 26;NO TA/RA-1 INPUT

Quick Links:

Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Suspect failed TTR output or wiring.

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