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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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For AOG assistance contact:

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Quick Links

10/12/22

Message Overview:

Message Name:

FAULT

Message Code:

B3-007845

Associated CAS:

ELECTRICAL FAULT
(Caution)

ELECTRICAL FAULT
(Advisory)

Reporting LRU: R PROTECTION PCB
System Description: 24-61-00
Schematic Diagram: 24-61-00
Wiring Diagram: 24-61-03

Message Description:

The Right DC Power-Center Protection or Left DC Power-Center Protection have reported a failure with the Right DC Power-Center Protection.

Possible Causes:

  • Right DC Power-Center Protection (RPROT) (PCB2)
  • Right DC Power-Center Primary-Logic (RLOG) (PCB4)
  • Right DC Power-Center Power Module (PMOD) (PCB8)
  • Right Power Center (RDCPC) (A36)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of DC Power Center (DCPC) AMM 24-61-01-000-801
Installation of DC Power Center (DCPC) AMM 24-61-01-400-801
Removal of the DC Power-Center Primary-Logic AMM 24-61-73-000-801
Installation of the DC Power-Center Primary-Logic AMM 24-61-73-400-801
Removal of the DC Power-Center Protection AMM 24-61-77-000-801
Installation of the DC Power-Center Protection AMM 24-61-77-400-801
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. Interchange the Right DC Power-Center Protection (PCB2) with the Left DC Power-Center Protection (PCB1). Is the fault message still present?
    NOTE: When removing cards, take the opportunity to inspect the card connector and pins carefully.

    1. If YES, continue with next step.
    2. If NO, replace the defective DC Power-Center Protection.

  2. Swap the Right DC Power-Center Primary-Logic (PCB4) with the Left DC Power-Center Primary-Logic (PCB3). Is the fault message still present?

    1. If YES, continue with next step.
    2. If NO, replace the defective DC Power-Center Primary-Logic.

  3. If you notice the failure is prominent on engine start or when an engine is running, swap the RH DCPC Power Module (PCB8) with the LH Power Module (PCB7). Is the fault still present on the same side?

    1. If YES, continue with next step.
    2. If NO, replace defective Power Module.

  4. Replace Right DC Power Center (A36).
  5. Do close out.

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