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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

03/17/21

Message Overview:

Message Name:

INTERNAL FAULT

Message Code:

B3-006272

Associated CAS:

None

Reporting LRU: ADC 1
System Description: 34-13-00
Schematic Diagram: 34-13-00
Wiring Diagram: 34-13-01
34-13-05

Message Description

Internal fault to the left ADC has occurred.

Possible Causes:

  • Left Air Data Computer (ADC) (A1)
  • Input/Output Concentrator (IOC)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Air Data Computer AMM 34-13-01-000-801
Installation of the Air Data Computer AMM 34-13-01-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Reset the AIR DATA 1 (CB1-C1) circuit breaker. Is the fault still present?

    1. If YES, continue with next step.
    2. If NO, do close out.
      NOTE: If the B3-006272 is displayed in relation to any AP, AFCS or YD issues please access and review the Advanced FGC Diagnostic data (Repair code, AP Engage code, AP Disengage code, YD Engage code and YD Disengage code) prior to shutting down aircraft power.
      NOTE: Ensure the passenger door is closed while verifying current faults in the MDC.

  2. Perform a complete MDC download for all legs including the Current Fault Messages (CFM), Fault Message History (FMH) and LRU Diagnostics Data (LDD). Report data to the CRC for further review.
  3. Review the MDC Data for the ADC Label 350.

    1. If bits 13, 14, and/or 15 are set, suspect water or other contamination in the pitot/static lines and/or drains. Inspect the drains for water and perform AMM TASK 34-11-00-100-801 for Pitot-Static System Purging.
    2. If bits 18, 19, and 20 are set, continue with next step.
    3. if bit 21, 25, and/or 26 are set suspect the ADC, Swap the ADC side to side and if the fault follows replaced the defective ADC.

  4. Interchange the Input/Output Concentrator (IOC) cards. Is the fault still present on the same side?

    1. If YES, continue with next step.
    2. If NO, replace defective IOC card.

  5. Interchange ADC 1 with ADC 2 to confirm faulty unit and replace if required.
  6. Do close out.

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