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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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04/08/21

Message Overview:

Message Name:

BLOCKING EQUATION

Message Code:

B3-478780

Associated CAS:

None

Reporting LRU: XM RECEIVER
System Description: 46-00-00
Schematic Diagram: 46-21-00
Wiring Diagram: 46-21-07 Sh 1
46-21-07 Sh 2

Message Description:

This equation does not produce a fault. It will block lower priority faults if the application is not enabled. It blocks the lower priority equations from failing if either L and R FSU XM enable bits indicate the XM is NOT disabled.

Possible Causes:

  • XM Weather Receiver (A231)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

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

    1. FSU1-52 1X 354 01 EXCT XXXX-XXXX XXXX-XXXX XXXX-XFXX 354 :!11;XM APPLICATION ENABLE
    2. FSU2-52 2X 354 10 EXCT XXXX-XXXX XXXX-XXXX XXXX-XFXX 354 :!11;XM APPLICATION ENABLE

Quick Links:

Removal of the XM Weather Receiver AMM 46-21-05-000-801
Installation of the XM Weather Receiver AMM 46-21-05-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02

Troubleshooting Recommendations:

  1. This equation does not produce a fault. It will block lower priority faults if the application is not enabled. It blocks the lower priority equations from failing if either L and R FSU XM enable bits indicate the XM is NOT disabled.

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