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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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03/31/21

Message Overview:

Message Name:

NO OUTPUT TO IOC

Message Code:

B3-539889

Associated CAS:

None

Reporting LRU: SVC
System Description: 34-34-00
Schematic Diagram: 34-34-00
Wiring Diagram: 34-34-01

Message Description:

SVC data is absent at the IOC.

Possible Causes:

  • Synthetic Vision Computer (SVC) (A230)
  • Input/Output Concentrator Unit 1 (IOC) (A4-IOC1)
  • Input/Output Concentrator Unit 2 (IOC) (A4-IOC2)
  • Integrated-Avionics Processor System (IAPS) Card Cage (ICC) (A4)
  • Video Interface Unit (VIU) (CP32)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/ Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: A GPS signal input is required for the SVS image to show on the pilot and the copilot primary flight display (PFD).

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 Synthetic Vision Computer (SVC) AMM 34-34-01-000-801
Installation of the Synthetic Vision Computer (SVC) AMM 34-34-01-400-801
Removal of the Video Interface Unit (VIU) AMM 34-34-09-000-801
Removal of the Video Interface Unit (VIU) AMM 34-34-09-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Reset SVS (CB2-A7) circuit breaker.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  2. Confirm 28 VDC and grounds at SVC connector A230AP1. Repair/replace as required.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.
      NOTE: Video Interface Unit (VIU) is sharing the same power source as the SVC and it have to be considered as a possible cause during the 28 VDC troubleshooting.

  3. Swap IOCs.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.

  4. Do wiring check of the ARINC 429 data bus SVC-1 from SVC connector A230AP1 to IAPS Card Cage (ICC) connector A4P1. Repair/replace as required.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.

  5. Replace SVC.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.

  6. Replace IAPS Card Cage (ICC).
  7. Do close out.

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