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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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03/19/21

Message Overview:

Message Name:

NO L-RIU-11 BUS INPUT

Message Code:

B3-006427

Associated CAS:

None

Reporting LRU: CDU 1
System Description: 34-61-00
Schematic Diagram: 34-61-00
Wiring Diagram: 34-61-03

Message Description:

L-RIU-11 data is absent at L-CDU and RIU data NOT absent at L-IOC; data link strapped.

Possible Causes:

  • Control Display Unit (CDU) (A68)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. LRU = CDU1 CDU 1
  2. ATA Chapter = 34-61
  3. Message# = 17
  4. Comp Id = A068
  5. {Term Definitions}

    1. OPT1-83 XX 360 NA EXCT CSU WD-15 XXXX-XXXX TXXX-XXXX 360-15: 8;RIU/CMU1 DATALINK
    2. CDU1-9 1X 350 01 EXCT XXXX-XXXX XXXX-XXTX XXXX-XXXX 350: 18;NO L-RIU-11 IN RX-2 PIN
    3. DLNK-9 1X 350 01 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A);NO IOC 1X IN

Quick Links:

Removal of the Control Display Unit (CDU) AMM 34-61-05-000-801
Installation of the Control Display Unit (CDU) AMM 34-61-05-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Suspect failed L-CDU input or wiring.
  2. Do close out.

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