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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

03/03/21

Message Overview:

Message Name:

DISCRETE INPUT TO DCU
(Service Message)

Message Code:

B3-008110

Associated CAS:

None

Reporting LRU: WING A/ICE VLV 1
System Description: 30-00-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

A disagreement has been detected between the position feedback from the WING ANTI-ICE VALVE 1 to the Data Concentrator Unit and the WING PBA selection feedback to the Data Concentrator Unit.

Possible Causes:

  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 4
  2. {Term Definitions}

    1. DWDC1-18 1X 111 00 EXCT XXXX-XXXX XXXX-XXXX XXTX-XXXX 111A: 14;WING A/I SELECTED OFF B
    2. DWDC1-7 1X 106 00 EXCT XXXX-XXXX XXXX-XXXX XTXX-XXXX 106A: 15;L WAIV OPEN

Quick Links:

Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Do a wiring check?

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