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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:

CRC Montreal (YUL)
Quick Links

07/18/19

Message Overview:

MDC Fault Message:

NO L-CDU-2 BUS OUTPUT

Equation ID:

B3-006419

Associated CAS:

None

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

Message Description:

No L-CDU-2 data received at SRT1 (SATCOM) and SRT strapped.

Possible Causes:

  • Right Control Display Unit (CDU) (Installation with Dual CDUs) (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. Comp Id = A068
  4. Message = NO L-CDU-2 BUS OUTPUT
  5. {Term Definitions}

    1. SRT1-16 XX 351 00 EXCT XXXX-XXXX XXXX-XXXX XXXX-TXXX 351: 12;SCDU #1 BUS
    2. OPT1-82 XX 360 NA EXCT CSU WD-11 XXXX-XXXX XXXX-FTXX 11,12: SATCOM INSTALLED

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 - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Suspect failed CDU output or wiring.

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