07/16/19
Message Overview:
Fault Message:
FMQGS COMPUTER INTERFACE/WRG FLT
Fault Code:
2844677PK
Associated CAS:
| Reporting LRU: | Fuel Management and Quantity Gauging Computer (FMQGC) |
| System Description: | 28-41-00 |
| Schematic Diagram: | 28-41-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 28-41-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
Fuel Management and Quantity Gauging Computer (FMQGC) does not sense one of the ARINC input signals from the Data Acquisition Units (DAUs).
Possible Causes:
- Data Acquisition Unit 1 (DAU) (A17)
- Data Acquisition Unit 2 (DAU) (A18)
- Fuel Management and Quantity Gauging Computer (FMQGC) (A47)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Connect Electrical Power to the Aircraft | AMM 24-00-00-861-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Remove the Electrical Power from the Aircraft | AMM 24-00-00-861-802 [ 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 ] |
| Removal of the Computer | AMM 28-41-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Computer | AMM 28-41-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Self-Test of the Computer | AMM 28-41-01-740-801 [ 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 ] |
| Flight Deck Effect to Fault Correlations | AMM 45-45-00-970-821 [ 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:
- Check if any of the following fault messages appear on the EICAS display:
- If YES, select displayed message from menu and perform troubleshooting.
- If NO, continue with the next step.
- Remove the FMQGC, the DAU 2 to get access to connector A18CP1 and the DAU 1 to get access to connector A17CP1. Perform a continuity check as follows:
NOTE: While the FMQGC is removed, make sure to inspect the FMQGC and FMQGC tray connectors. Check for damage, bent or pushed back pins and contamination.From To Result A17CP1-F6 Ground A17CP1-G6 Ground A18CP1-F6 Ground A18CP1-G6 Ground - If there is continuity, replace defective wiring as required and do close out.
- If there is no continuity, continue with the next step.
- Perform a continuity check as follows:
From To Result A17CP1-F6 A47EP1-A4 A17CP1-G6 A47EP1-A5 A18CP1-F6 A47EP1-C4 A18CP1-G6 A47EP1-C5 - If there is no continuity, repair defective wiring as required and do close out.
- If there is continuity, continue with next step.
- Reinstall the FMQGC making it is fully and properly inserted into place. Is the fault still present?
- If YES, continue with the next step.
- If NO, do close out.
- Swap DAU 1 with DAU 3. Is the fault still present?
- If NO, replace DAU 1 and do close out.
- If YES, continue with next step.
- Swap DAU 2 with DAU 4. Is the fault still present?
- If NO, replace DAU 2 and do close out.
- If YES, continue with next step.
- Replace the FMQGC.
- Do close out.