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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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02/10/21

Message Overview:

Message Name:

FAN/ICC SENSOR

Message Code:

B3-006932

Associated CAS:

None

Reporting LRU: IAPS IEC 1
System Description: 31-45-00
Schematic Diagram: 31-45-00
Wiring Diagram: 31-45-09

Message Description:

IOC 1 or IOC 2 is detecting a fan or a temp sensor failure.

Possible Causes:

  • Integrated-Avionics Processor System (IAPS) Environmental Controller (IEC) (A4-IEC)
  • Left Secondary Power Center (L SPC) (A37)
  • Integrated-Avionics Processor System (IAPS) Card Cage (ICC) (A4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Secondary Power Center (SPC) AMM 24-62-01-000-801
Installation of the Secondary Power Center (SPC) AMM 24-62-01-400-801
Removal of Integrated-Avionics Processor System (IAPS) Card Cage (ICC) AMM 31-45-01-000-801
Installation of Integrated-Avionics Processor System (IAPS) Card Cage (ICC) AMM 31-45-01-400-801
Removal of the Integrated-Avionics Processor System (IAPS) Power Supply (PWR) AMM 31-45-09-000-801
Installation of the Integrated-Avionics Processor System (IAPS) Power Supply (PWR) AMM 31-45-09-400-801
Removal of the Integrated-Avionics Processor System (IAPS) Environmental Controller (IEC) AMM 31-45-13-000-801
Installation of the Integrated-Avionics Processor System (IAPS) Environmental Controller (IEC) AMM 31-45-13-400-801
Standard Practices - Wire Replace SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Reset L IAPS Circuit Breaker CB1-B6, R IAPS Circuit Breaker CB2-B6 and IAPS FAN Circuit Breaker CB3-E1. Is the fault message still present?

    1. If YES, continue with next step.
    2. If NO, do close out.
      NOTE: Before you open the IAPS circuit breakers, make sure that all Engine FADEC circuit breakers are open. If the Engine FADEC circuit breakers remain closed, Engine Igniters will activate. This can cause injury to persons and damage to equipment.

  2. With a multimeter, verify presence of 28 VDC and GND for the IEC at the IAPS Card Cage (A4).

    From To Expected Result Result
    Conn. A4P4 - F Aircraft Ground 28 VDC
    Conn. A4P4 - G Aircraft Ground ≈ 0Ω

    1. If verification is satisfactory, go to step 5.
    2. If verification is not satisfactory, continue with next step.

  3. Do wiring check between the IAPS Card Cage (A4) and the Left Secondary Power Center (A37).

    From To Result
    Conn. A4P4 - F A37P3 - 35
    Conn. A4P4 - G Aircraft Ground

    1. If check is satisfactory, continue with next step.
    2. If check is not satisfactory, repair defective wire.

  4. Replace Left Secondary Power Center (A37) and do close out.
  5. Replace IEC. Is the fault message still present?

    1. If NO, do close out.
    2. If YES, continue with next step.

  6. Replace IAPS card cage (A4).
  7. Do close out.

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