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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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03/30/21

Message Overview:

Message Name:

INERTIAL REFERENCE UNIT

Message Code:

231003

Associated CAS:

None

Reporting LRU: Satellite Data Unit (SDU)
System Description: 23-13-00
Schematic Diagram: 23-13-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 23-13-09 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

A failure related to the data from the Inertial Reference System (IRS) connected to the Satellite Data Unit (SDU) secondary port has been detected by the SDU.

Possible Causes:

  • Inertial Reference Unit (IRU) 2 (A33)
  • Satellite Data Unit (SDU) (A228)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

AW 700-23-0584

AW 700-23-0756

SB 700-23-001

SB 700-23-043

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Satellite Data Unit AMM 23-13-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Satellite Data Unit AMM 23-13-01-400-801 [ 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. Disconnect IRU 2 connector A33BP1 and SDU connector A228BP1. Perform a continuity check as follows:

    From To Result
    A228BP1-C6 Ground
    A228BP1-D6 Ground
    A228BP1-C6 A228BP1-D6

    1. If there is continuity, repair defective wiring or JB as required and do close out.
    2. If there is no continuity, continue with next step.

  2. Perform a continuity check as follows:

    From To Result
    A228BP1-C6 A33BP1-E5
    A228BP1-D6 A33BP1-E6

    1. If there is continuity, continue with next step.
    2. If there is no continuity, repair defective wiring or JB as required and do close out.

  3. Swap IRU 2 with IRU 1. Is the fault still present?

    1. If YES, continue with next step.
    2. If NO, replace IRU 2 and do close out.

  4. Replace the SDU.
  5. Do close out.

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