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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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08/06/19

Message Overview:

Fault Message:

FWC 2 - EXTERNAL RSB FAULT

Fault Code:

3151013FW2

Associated CAS:

None

Reporting LRU: Fault Warning Computer (FWC) 2
System Description: 31-44-00
Schematic Diagram: 31-44-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 31-44-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Aircraft Radio Systems cannot transmit data through the Radio System Bus (RSB), or the RSB data is not correct.

Possible Causes:

  • Integrated Avionics Computer (IAC) 2 (A10)
  • Radio Management Unit (RMU) 2 (A26)
  • Very High Frequency (VHF) Communication Unit 2 (A2)
  • Very High Frequency (VHF) Navigation (NAV) Unit 2 (A4)
  • Radio System Bus (RSB)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the VHF Communication Unit AMM 23-11-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the VHF Communication Unit AMM 23-11-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Radio Management Units (RMU) AMM 23-81-01-000-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Radio Management Units (RMU) AMM 23-81-01-400-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Connect Electrical Power to the Aircraft AMM 24-00-00-861-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Remove the Electrical Power from the Aircraft AMM 24-00-00-861-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Integrated Avionics Computers (IAC) AMM 31-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Integrated Avionics Computers (IAC) AMM 31-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Digital Bus System AMM 31-44-00-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the VHF Navigation Units AMM 34-51-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the VHF Navigation Units AMM 34-51-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Active Faults AMM 45-45-00-970-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Integrated Maintenance Test (IMT) Fault
Code Look-Up		 AMM 45-45-00-970-826 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Access CAIMS active faults. Are any of the following messages displayed.

    • FWC 1 - EXTERNAL RSB FAULT
    • FWC 2 - EXTERNAL RSB FAULT
    • FWC 3 - EXTERNAL RSB FAULT

    1. If NO, do close out.
    2. If YES, access CAIMS Systems Diagnostics and perform the RSB system test or IAC EDS core test and continue with next step.

  2. After each IMT test has completed, record the active IMT code from the TEST RESULTS page.
  3. Perform the Intergrated Maintenance Test (IMT) fault code look-up to find the applicable troubleshooting procedures.
  4. Do close out.

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