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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:

ACSC_1A/WRG/DAU #3 INACTIVE

Fault Code:

3145155DAU

Associated CAS:

None

Reporting LRU: Data Acquisition Unit (DAU) 3
System Description: 21-52-00
Schematic Diagram: None
Wiring Diagram: None

Fault Description:

Data Acquistion Unit (DAU) 3 is reporting that one of the following is at fault:

  • The DAU 3 ARINC Receiver (internal failure)
  • The Transmitter of the Line Replaceable Unit (LRU) wired to DAU 3 (see below for LRU identification)
  • ARINC wiring interfacing DAU 3 and LRU

According to DAU 3 position, LRU is

Possible Causes:

  • Data Acquisition Unit (DAU) 3 (A30)
  • Air Conditioning System Controller (ACSC) 1 (A87)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

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