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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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Quick Links

08/24/19

Message Overview:

Fault Message:

ISU/WRG/COM FAULT

Fault Code:

3430005EVS

Associated CAS:

None

Reporting LRU: Enhanced Vision System (EVS)-Infrared Sensor Unit (ISU)
System Description: 34-32-00
Schematic Diagram: 34-32-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 34-32-05 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Enhanced Vision System (EVS)-InfraRed Sensor Unit (ISU) internal failure.

Possible Causes:

  • Head-Up Flight Display Computer (HFDC) (A250)
  • Infrared Sensor Unit (ISU) (A318)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: HFDC is the official vendor assigned name-Bombardier uses HUDC.

Quick Links:

Removal of the Head-Up-Display (HUD) Computer AMM 34-32-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Head-Up-Display (HUD) Computer AMM 34-32-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Enhanced Vision System (EVS) - InfraRed
Sensor Unit (ISU)		 AMM 34-33-03-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Enhanced Vision System (EVS) - InfraRed
Sensor Unit (ISU)		 AMM 34-33-03-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Measure for 28 VDC at ISU connector as follows:

    ISU Expected Result Result
    A318P1-K 28 VDC

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

  2. Perform wiring checks between HUDC and ISU as follow:

    From To Result
    A318P1-H A250DP1-G1
    A318P1-Z A250DP1-H1

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  3. Replace ISU.

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

  4. Replace HUDC.
  5. Do close out.

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