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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

09/17/19

Message Overview:

Fault Message:

CH A - IGN PLUG/LEAD/EXCITER/WIRING

Fault Code:

4960204APU

Associated CAS:

None

Reporting LRU: Full-Authority Digital Engine-Controller (FADEC)
System Description: 49-40-00
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 Ignition Exciter internal Built-In Test (BIT) show a defective channel.

Possible Causes:

  • Ignition Exciter (A2)
  • Igniter Plug Lead
  • Igniter Plug
  • 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 Ignition Exciter AMM 49-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Ignition Exciter AMM 49-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Igniter Plug Leads AMM 49-41-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Igniter Plug Leads AMM 49-41-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Igniter Plugs AMM 49-41-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Igniter Plugs AMM 49-41-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Detailed Inspection of the Igniter Plugs AMM 49-41-09-220-801 [ 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 ]
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. Check if SHORT CH A - IGN PLUG/LEAD/EXCITER/WRG still shows.

    1. If NO, do close out.
    2. If YES, continue with next step.

  3. Perform a detailed inspection of the igniter plugs for damage.

    1. If plugs are damaged, replace plugs and do close out.
    2. If plugs are good, continue with next step.

  4. Perform a continuity check between the pins on each end of the igniter plug leads. The resistance should be less than one ohm.

    1. If there is no continuity, replace Igniter plug lead and do close out.
    2. If there is continuity, continue with next step.

  5. Examine the ignition exciter (A2) receptacle for contamination and damage.

    1. If damaged, go to step 12.
    2. If there is no damage, continue with next step.

  6. Check if SHORT CH A - IGN PLUG/LEAD/EXCITER/WRG still shows.

    1. If NO, do close out.
    2. If YES, continue with next step.

  7. Make sure there is no short between each pin A, B, C, D and the connector shell of A2 receptacle (WM 49-12).

    1. If there is a short, go to step 12.
    2. If there is no short, continue with next step.

  8. Check if SHORT CH A - IGN PLUG/LEAD/EXCITER/WRG still shows.

    1. If NO, do close out.
    2. If YES, continue with next step.

  9. Perform a continuity check between pin E and the connector shell of A2 receptacle (WM 49-12).

    1. If there is no continuity, go to step 12.
    2. If there is continuity and if SHORT CH A - IGN PLUG/LEAD/EXCITER/WRG still shows, continue with next step.

  10. Perform wiring checks between APU (P1) and ignition exciter (A2P1).

    1. If wiring checks are not good, replace engine branched wiring harness and do close out.
    2. If wiring checks are good and if SHORT CH A - IGN PLUG/LEAD/EXCITER/WRG still shows, continue with next step.

  11. Perform wiring checks between aircraft wiring harness (J802) and FADEC (A108BP1).

    1. If wiring checks are good, do close out.
    2. If wiring checks are not good, continue with next step.

  12. Replace Ignition Exciter (A2).
  13. Do close out.

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