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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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09/16/19

Message Overview:

Fault Message:

OPEN CKT - EGT SENSOR/CKT 2 WIRING

Fault Code:

4960154APU

Associated CAS:

APU FAULT
(Advisory)

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: 49-12-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
49-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Exhaust Gas Temperature (EGT) Sensor 2 conditioning voltage in the Full-Authority Digital Engine-Controller (FADEC) is out of range low and the signal read by the FADEC is out of range low. This shows a possible open in the EGT Sensor or the engine branched wiring-harness.

Possible Causes:

  • Exhaust Gas Temperature (EGT) Sensor 2 (TC1-2)
  • 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 Exhaust Gas Temperature (EGT) Sensor AMM 49-61-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Exhaust Gas Temperature (EGT) Sensor AMM 49-61-05-400-801 [ 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 engine branched wiring-harness for bare wiring, kinks, worn areas and other damage (WM 49-12).

    1. If there is bare wiring, kinks, worn areas or other damage, replace engine branched wiring-harness and do close out.
    2. If NO, continue with next step.

  2. Remove the electrical connector lugs from the studs (Alumel and Chromel terminals) of the EGT sensor (EGT2) (WM 49-12) and examine the EGT sensor (EGT2) for contamination or damage.

    1. If EGT sensor (EGT2) is contaminated or damaged, go to step 7.
    2. If NO, continue with next step.

  3. Perform a continuity check between the EGT sensor studs of the EGT sensor (EGT2) (WM 49-12) as follows:

    From To Expected Result Result
    Alumel Chromel <20 ohms

    1. If there is no continuity, go to step 7.
    2. If there is continuity, continue with next step.

  4. Perform a continuity check between terminal lugs on the EGT Sensor and the connector pins as follows (WM 49-12):

    From To Expected Result Result
    P802-36 Alumel terminal (-) <6 ohms
    P802-37 Chromel terminal (+) <6 ohms

    1. If there is no continuity, replace the engine branched wiring-harness and do close out.
    2. If there is continuity, continue with next step.

  5. Perform a continuity check between the pins of the connectors as follows (WM 49-61):

    From To Expected Result Result
    J802-36 A108BP1-K8 <11 ohms
    J802-37 A108BP1-K7 <11 ohms

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

  6. Replace FADEC.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  7. Replace EGT sensor (EGT2).
  8. Do close out.

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