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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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03/25/21

Message Overview:

Message Name:

NO R-PFD-1 BUS OUTPUT

Message Code:

B3-007371

Associated CAS:

None

Reporting LRU: PFD 2
System Description: 31-61-00
Schematic Diagram: 31-61-00
Wiring Diagram: 31-61-02

Message Description:

Right PFD data bus (R-PFD-1) is reported absent by the right IOC, while the left IOC does not report absence of the right IOC.

Possible Causes:

  • Adaptive Flight-Display Unit (R PFD) (A26)
  • Right Input/Output Concentrator Unit (IOC 2) (A4-IOC1)
  • Integrated-Avionics Processor System (IAPS) Card Cage (ICC) (A4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Integrated-Avionics Processor System (IAPS) Card Cage (ICC) AMM 31-45-01-000-801
Installation of the Integrated-Avionics Processor System (IAPS) Card Cage (ICC) AMM 31-45-01-400-801
Removal of the Input/Output Concentrator Unit (IOC) AMM 31-45-05-000-801
Installation of the Input/Output Concentrator Unit (IOC) AMM 31-45-05-400-801
Removal of the Adaptive Flight-Display Unit AMM 31-61-01-000-801
Installation of the Adaptive Flight-Display Unit AMM 31-61-01-400-801
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. Reset R PFD Circuit Breaker CB2-C3 and R IAPS Circuit Breaker CB2-B6. Is the fault message still present?

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

  2. Swap R PFD (A26) with L PFD (A27). Is the fault message still present?

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

  3. Swap R IOC with L IOC. Is the fault message still present?

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

  4. Do wiring check from R PFD (A26) to the Integrated-Avionics Processor System (IAPS) Card Cage (ICC) for the following wire:

    From: To: Result:
    Conn. A26P1 - 61 Conn. A4P101 - 55
    Conn. A26P1 - 73 Conn. A4P101 - 56

    1. If the check is satisfactory, replace the Integrated-Avionics Processor System (IAPS) Card Cage (ICC).
    2. If the check is not satisfactory, repair wiring.

  5. Do close out.

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