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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:

RTDEX 2/WRG/DAU 4

Fault Code:

3147036DAU

Associated CAS:

None

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

Fault Description:

Data Acquiston Unit (DAU) 4 is reporting that one of the following is at fault:

  • Resistive Temperature Detector excitation (see below for identification)
  • DAU 4 (internal failure)
  • Wiring between DAU 4 and RTDEX 2

According to DAU 4 position RTDEX 2 is used for:

  • DAU 1: Left E

Possible Causes:

  • Data Acquisition Unit (DAU) 4 (A31)
  • Resistive Temperature Detector

Troubleshooting Tips:

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Troubleshooting Recommendations:

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