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(WARNING)
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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

09/20/19

Message Overview:

Fault Message:

GND SHORT - OIL TEMP SENSOR/WIRING

Fault Code:

4960242APU

Associated CAS:

None

Reporting LRU: Full-Authority Digital Engine-Controller (FADEC)
System Description: 49-90-00
Schematic Diagram: 49-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 49-12-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
49-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Short circuit to ground on the Sensor (+), (-) or (sense) leads.

Possible Causes:

  • Oil Temperature Sensor (MT6)
  • Auxiliary Power Unit (APU) Full-Authority Digital Engine-Controller (FADEC) (A108)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

APU Safety Precautions AMM 49-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Engine Branched Wiring-Harness AMM 49-12-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Engine Branched Wiring-Harness AMM 49-12-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
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 ]
Removal of the Oil Temperature Sensor AMM 49-90-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Oil Temperature Sensor AMM 49-90-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Open the Auxiliary Power Unit (APU)
Access Doors (321BB)		 AMM 52-43-00-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Close the Auxiliary Power Unit (APU)
Access Doors (321BB)		 AMM 52-43-00-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Access and disconnect APU Oil temperature sensor connector MT6P1. Perform a complete visual inspection of both mating connectors. Look for contamination or damage.

    1. If damage or contamination is found, repair/clean as required and do close out.
    2. If inspection is good, continue with next step

  2. Perform a continuity check on the sensor as follows:

    From To Result
    MT6J1-A Ground
    MT6J1-B Ground

    1. If there is continuity, replace the APU Oil Temperature Sensor and do close out.
    2. If there is no continuity, continue with next step.

  3. Disconnect APU FADEC connector A108BP1. Perform a continuity check as follows:

    From To Result
    A108BP1-G6 Ground
    A108BP1-H6 Ground
    A108BP1-J6 Ground

    1. If there is continuity, repair defective wiring as required and do close out.
    2. If there is no continuity, continue with next step.

  4. Replace the APU FADEC.
  5. Do close out.

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