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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:

IRU3/WRG/ COM FAULT

Fault Code:

343000AHUD

Associated CAS:

None

Reporting LRU: Head-Up-Display (HUD) System
System Description: 34-32-00
Schematic Diagram: 34-32-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 34-32-04 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Head-Up-Display (HUD) System does not receive data from the Inertial Reference Unit (IRU).

Possible Causes:

  • Head-Up Flight Display Computer (HFDC) (A250)
  • Inertial Reference Unit (IRU) 3 (A34)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

If more fault reports are sent by a different system about the same IRU, do theCAIMS Test of the Integrated Avionics Computer (IRU) System.

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 Inertial Reference Units (IRU) AMM 34-45-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Inertial Reference Units (IRU) AMM 34-45-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap IRU 3 with IRU 2.

    1. If system checks are good, replace IRU 3 and do close out.
    2. If fault remains, continue with next step.

  2. Perform wiring checks between IRU 3, JB5 and HUDC as follow:

    From To Result
    A34BP1-E5 A250BP1-A1
    A34BP1-E6 A250BP1-A2
    GND A250BP1-B2
    A34BP1-SH A250BP1-SH
    A34BP1-G7 A250EP1-C1
    A34BP1-G8 A250EP1-C2
    GND A250EP1-B2
    A34BP1-SH A250EP1-SH

    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 HUDC.
  4. Do close out.

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