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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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08/23/19

Message Overview:

Fault Message:

DAU #4 [CPU] UNUSED FAULT

Fault Code:

3147056DAU

Associated CAS:

None

Reporting LRU: Data Acquisition Unit (DAU) 4
System Description: 31-40-00
Schematic Diagram: None
Wiring Diagram: None

Fault Description:

The Data Acquisition Unit (DAU) 4 is reporting that its Central Processor Unit is unused. Any Aeronautical Radio Incorporated (ARINC) 429 Processing activity may be affected by this fault.

Possible Causes:

  • Data Acquisition Unit (DAU) 4 (A31)

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Advisory Wire/Service Bulletin: None

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