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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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04/13/21

Message Overview:

Message Name:

IGNITION ACTIVATION 4

Message Code:

B3-303052

Associated CAS:

None

Reporting LRU: L ENG IGN UNIT
System Description: 74-00-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Left engine ignition activation fault 4.

[MCID 0703]
Ignition Activation 4.
Detection of a fault primarily in the ignition system (ignitor channel A or B).

Possible Causes:

  • Ignition exciter
  • Wiring Harness (W6)
  • Wiring Harness (W3)
  • Full Authority Digital Engine Control Unit (FADEC) Electronic Control Unit A (ECU) (A41)
  • Full Authority Digital Engine Control Unit (FADEC) Electronic Control Unit B (ECU) (A43)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Component Location AMM 28-41-00-992-801
General Visual Inspection of the Engine Wiring Harness AMM 71-50-00-210-802
Removal of the FADEC Electrical Harness from the Left Engine AMM 71-50-05-000-802
Installation of the FADEC Electrical Harness on the Left Engine AMM 71-50-05-400-802
Removal of the FADEC Electrical Harness from the Right Engine AMM 71-50-05-000-803
Installation of the FADEC Electrical Harness on the Right Engine AMM 71-50-05-400-803
Component Location AMM 74-10-00-992-801
Removal of the Ignition Unit AMM 74-10-01-000-801
Installation of the Ignition Unit AMM 74-10-01-400-801
Component Location AMM 74-20-00-992-801
Detailed Inspection of the Engine Ignition Lead Assembly AMM 74-20-00-220-801
Removal of the Ignition Plugs AMM 74-20-01-000-801
Installation of the Ignition Plugs AMM 74-20-01-400-801
Removal of the Igniter Lead AMM 74-20-02-000-802
Installation of the Igniter Lead AMM 74-20-02-400-802
Removal of the Engine Electronic Control Unit (ECU) AMM 76-10-05-000-801
Installation of the Engine Electronic Control Unit (ECU) AMM 76-10-05-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02
Electrical Connectors - Maintenance Practice - ALL SPM 20-20-00-02

Troubleshooting Recommendations:

  1. MCID 0703 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual TASK 72-00-00-810-093.
    300_7410_001300_7421_001300_7410_002

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