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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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Quick Links

09/19/19

Message Overview:

Fault Message:

LOAD LEVEL OPEN CKT - APU GCU/WRG

Fault Code:

4960234APU

Associated CAS:

None

Reporting LRU: Full-Authority Digital Engine-Controller (FADEC)
System Description: 49-60-00
Schematic Diagram: 49-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 24-22-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
49-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Generator load level input conditioning voltage in the Full-Authority Digital Engine-Controller (FADEC) is out of range low. This shows that the Generator load level input or the aircraft wiring harness could have an open.

Possible Causes:

  • Full-Authority Digital Engine-Controller (FADEC) (A108)
  • Auxiliary Power Unit (APU) Generator Control Unit (GCU) (A109)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Full-Authority Digital
Engine-Controller (FADEC)		 AMM 49-61-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Full-Authority Digital
Engine-Controller (FADEC)		 AMM 49-61-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Examine the AC wiring harness for bare wiring, kinks, worn areas and other damage.

    1. If there is bare wiring, kinks, worn areas and other damage, replace AC wiring harness and do close out.
    2. If there is no damage, continue with next step.

  2. Perform a wiring check between AC wiring harness connector (P619) and FADEC connector (A108BP1) (WM 24-22).

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  3. Perform a wiring check between AC wiring harness connector (J619) and AC wiring harness connector (P320) (WM 24-22).

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  4. Perform a wiring check between AC wiring harness connector (J320) and APU generator connector (A109P2) (WM 24-22).

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  5. Perform a check of the EICAS primary display to find EICAS messages that are related to the APU generator.

    1. If there are EICAS primary display to find EICAS messages that are related to the APU generator, troubleshoot the appropriate APU generator fault and do close out.
    2. If there are no EICAS primary display, continue with next step.

  6. Replace FADEC.
  7. Do close out.

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