07/29/19
Message Overview:
Fault Message:
SATCOM [INACTIVE]/WRG/DAU 2
Fault Code:
3143045DAU
Associated CAS:
| Reporting LRU: | Data Acquisition Unit (DAU) 2 |
| System Description: | 31-40-00 |
| Schematic Diagram: | 31-42-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 31-42-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
The Data Acquisition System does not receive Aeronautical Radio, Inc. (ARINC) 429 data from the Satellite Data Unit (SDU).
Possible Causes:
- Satellite Data Unit (SDU) (A228)
- Junction Box (JB4)/PCB2
- Data Acquisition Unit (DAU) 2 (A18)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Operational Test of the Satellite Communication System | AMM 23-13-00-710-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| 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 ] |
| Opening of Non-Thermal Circuit Breakers | AMM 24-00-00-863-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Closing of Non-Thermal Circuit Breakers | AMM 24-00-00-863-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Electrical/Electronic Safety Precautions | AMM 24-00-00-910-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Electrostatic Discharge Safety Precautions | AMM 24-00-00-910-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Operational Test of Junction Box JB4 Circuit-Card 2 | AMM 24-00-06-710-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Data Acquisition Units (DAU) | AMM 31-42-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Data Acquisition Units (DAU) | AMM 31-42-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Access to Active Faults | AMM 45-45-00-970-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the External Avionics-Compartment Access-Panel (140BB) | AMM 52-45-11-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the External Avionics-Compartment Access-Panel (140BB) | AMM 52-45-11-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Safety Precautions - Maintenance Practices - ALL | SPM 20-00-01-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Remove DAU 2 and SDU. Perform a continuity check as follows:
From To Result A18CP1-A9 A228BP1-C4 A18CP1-A10 A228BP1-D4 A18CP1-Shield A228BP1-Shield - If there is no continuity, repair or replace defective wiring as required and do close out.
- If there is continuity, continue with next step.
- Perform a continuity check as follows:
From To Result A18CP1-A9 Ground A18CP1-A10 Ground A18CP1-Shield Ground - If there is continuity, repair or replace defective wiring as required and do close out.
- If there is no continuity, continue with next step.
- Swap DAU 2 with DAU 4.
- If system checks are good, replace DAU 2 and do close out.
- If fault remains, continue with next step.
- Replace the SDU.
- Do close out.