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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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03/30/21

Message Overview:

Message Name:

BLOCK FAULTS FOR IOC OFF

Message Code:

B3-413205

Associated CAS:

None

Reporting LRU: FMC 2
System Description: 34-00-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

This equation blocks all faults for this LRU when IOC quadrant is dead. IOC quadrant needs to be working for LRU to report correctly. Likely need to power IOC up.

Possible Causes:

  • Input/Output Concentrator Unit 2 (IOC) (A4-IOC)
  • Flight Management Computer 2 (FMC) (A4-FMC)
  • Integrated-Avionics Processor System (IAPS) Card Cage (ICC) (A4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 1
  2. {Term Definitions}

    1. IOC2-1 2X 350 10 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 2X IN;

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 Flight Management Computer (FMC) AMM 34-61-01-000-801
Installation of the Flight Management Computer (FMC) AMM 34-61-01-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Likely need to power IOC up.

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