01/11/21
Message Overview:
| DDG Reference: | 22-13-01 |
| Pilot Action (QRH): | AVNC 02-13 |
| System Description: | 22-13-00 |
| Schematic Diagram: | 22-13-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 22-13-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
The YD 1 system does not operate correctly.
Possible Causes:
- Yaw Damper (YD) 1
- Integrated Avionics Computer (IAC) 1 (A11)
- Rudder Linear Actuator 1 (B19)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter:
- AFCS and YD FAIL nuisance CAS messages Forum article.
Make sure the inertial reference system is successfully Initialized before performing the Yaw Damper Operational Test.
- YD 1 FAIL can be considered as an intermittent fault when Yaw Damper Operational Test passes.
- If YD 1 FAIL is displayed at the same time as AFCS 1 FAIL, the messages could be a nuisance caused by exiting the CAIMS PMAT. Refer to the AFCS/YD CAS message clearing procedure.
Quick Links:
| Operational Test of the Yaw Damper System | AMM 22-13-00-710-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Access to Active Faults | AMM 45-45-00-970-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Integrated Maintenance Test (IMT) Fault Code Look-Up | AMM 45-45-00-970-826 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair | SPM 20-12-10 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Carry out Yaw Damper Operational Test.
- If operational test passes, do close out.
- If operational test fails, continue with next step.
- Access CAIMS PMAT and check AFCS/IAC1 for Active Faults.
- Run PMAT test as required and use IMT Failure Code to isolate/verify AFCS/IAC1 fault in Active Faults.
- Do the close out.