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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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04/28/20

Message Overview:

Fault Message:

SDU TO RFU CAL. GAIN OUT OF RANGE/W

Fault Code:

23100D7SC

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 ]

Fault Description:

The Satellite Communications (SATCOM) System operates incorrectly or not at all. Issue detected with the output coaxial of the Satellite Data Unit (SDU) to the Radio Frequency Unit (RFU).

Possible Causes:

The Satellite Communications (SATCOM) System operates incorrectly or not at all. Issue detected with the output coaxial of the Satellite Data Unit (SDU) to the Radio Frequency Unit (RFU).

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

AW 700-23-0584 - Honeywell SDU-600 Obsolescence

AW 700-23-0756 - MCS-7000 Obsolescence

SB 700-23-001 - Modification MCS-6000 SATCOM

SB 700-23-043 - Modification MCS-7000 SATCOM

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 Radio Frequency Unit AMM 23-13-25-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Radio Frequency Unit AMM 23-13-25-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Disconnect SDU connector A228CP1 and RFU connector A240CP1. Inspect the Coaxial cable connector on both ends and make sure it is not damaged or contaminated.

    1. If the checks are not good, repair/replace defective coaxial cable as required and do close out.
    2. If the checks are good, continue with next step.

  2. Perform a continuity check as follows:

    From To Result
    A228CP1-12 Ground
    A228CP1-12 Outer connector (Shield)

    1. If there is continuity, repair/replace defective coaxial cable as required and do close out.
    2. If there is no continuity, continue with next step.

  3. Perform a continuity check as follows:

    From To Result
    A228CP1-12 A240CP1-12

    1. If there is no continuity, repair/replace defective coaxial cable as required and do close out.
    2. If there is continuity, continue with next step.

  4. Replace the RFU. Is the fault still present?

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

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

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