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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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10/21/20

Message Overview:

YD 2 FAIL
(Caution)

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: 22-13-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The YD 2 system does not operate correctly.

Possible Causes:

  • Yaw Damper (YD) 2
  • Integrated Avionics Computer (IAC) 2 (A10)
  • Rudder Linear Actuator 2 (B18)
  • 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 2 FAIL can be considered as an intermittent fault when Yaw Damper Operational Test passes.
    • If YD 2 FAIL is displayed at the same time as AFCS 2 FAIL, the messages could be a nuisance caused by exiting the CAIMS PMAT or performing an NVM download. 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:

  1. Carry out Yaw Damper Operational Test.

    1. If operational test passes, do close out.
    2. If operational test fails, continue with next step.

  2. Access CAIMS PMAT and check AFCS/IAC2 for Active Faults.
  3. Run PMAT test as required and use IMT Failure Code to isolate/verify AFCS/IAC2 fault in Active Faults.
  4. Do the close out.

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