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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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07/22/19

Message Overview:

Fault Message:

DAU1B INVALID / WRG

Fault Code:

3030004HBM

Associated CAS:

None

Reporting LRU: Heater/Brake-Temperature Monitoring Unit (HBMU) 1
System Description: 30-31-00
Schematic Diagram: 30-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 31-42-05 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

LABEL 270 from Data Acquisition Unit (DAU) 1B to Heater/Brake-Temperature Monitoring Unit (HBMU) 1 has been detected invalid.

Possible Causes:

  • Heater/Brake-Temperature Monitoring Unit (HBMU) 1 (A121)
  • Data Acquisition Unit (DAU) 1 (A17)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Heater/Brake-Temperature Monitoring Unit (HBMU) AMM 30-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Heater/Brake-Temperature Monitoring Unit (HBMU) AMM 30-31-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Data Acquisition Units (DAU) AMM 31-42-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Data Acquisition Units (DAU) AMM 31-42-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap DAU 1 with DAU 3.

    1. If system checks are good, replace DAU 1 and do close out.
    2. If fault remains, continue with next step.

  2. Replace HBMU 1.
  3. Do close out.

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