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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

02/25/21

Message Overview:

Message Name:

AIRCRAFT POWER 1B

Message Code:

B3-302129

Associated CAS:

None

Reporting LRU: L ENG AC POWER
System Description: 76-11-00
Schematic Diagram: 76-11-00
Wiring Diagram: None

Message Description:

Left engine aircraft power fault 1B. A fault in the aircraft power supply and the ECU B was sensed.

Possible Causes:

  • Aircraft Power Supply
  • 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:

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 1604 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual TASK 72-00-00-810-337.

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