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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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04/27/20

Message Overview:

Fault Message:

TELEPHONE UNIT/WIRING/SDU/RFU

Fault Code:

2310082SC

Associated CAS:

None

Reporting LRU: Satellite Data Unit (SDU)
System Description: 23-14-00
Schematic Diagram: 23-14-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 23-14-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Data bus from the Airborne Telephone Unit to Radio Frequency Unit (RFU) from Satellite Data Unit (SDU) is inactive. For MCS-7000 installation, the RFU is not external to the SDU.

Possible Causes:

  • Air Radio-Telecommunications Unit (ARTU) (A246)
  • Satellite Data Unit (SDU) (A228)
  • Associated Wiring

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 700-23-005 - AIRBORNE DATA LINK SYSTEM (ADLS) - INSTALLATION

SB 700-1A11-23-025 - INSTALLATION OF NEW BACKLIT TELEPHONE HANDSET

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 Air Radio-Telecommunications Unit (ARTU) AMM 23-14-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Air Radio-Telecommunications Unit (ARTU) AMM 23-14-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Disconnect ARTU connector A246P1 and SDU connector A228BP1. Perform a continuity check as follows:

    From To Result
    A246P1-A Ground
    A246P1-T Ground
    A246P1-S Ground
    A246P1-e Ground
    A246P1-A A246P1-T
    A246P1-S A246P1-e

    1. If there is continuity, repair defective wiring 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
    A246P1-A A228BP1-J2
    A246P1-T A228BP1-K2
    A246P1-S A228BP1-A3
    A246P1-e A228BP1-B3

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

  3. Replace the ARTU. Is the fault still present?

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

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

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