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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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02/02/26

Message Overview:

Message Name:

ICE DETECTOR 1 FAIL

Message Code:

B3-006930

Associated CAS:

ICE DETECTOR FAIL
(Caution)

ICE DETECTOR FAULT
(Advisory)

Reporting LRU: ICE DETECTOR 1
System Description: 30-81-00 - Ice Detection System
Schematic Diagram: 30-81-00 - Ice Detection System
Wiring Diagram: 30-81-01 - Ice Detectors Power - ALL
30-81-05 - Ice Detectors Control - ALL

Message Description:

The LEFT ICE DETECTOR is detected failed by the Stall Protection Computer or the discrete wiring to the Stall Protection Computer is failed open circuit.

Possible Causes:

  • Left Ice Detector (A65)
  • Stall Protection Computer (SPC) (A178)
  • Circuit Breaker
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

Quick Links:

General Setup for Maintenance
Standard Aircraft Configuration for Maintenance AMM 12-00-00-867-803
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801
Electrostatic Discharge Safety Precautions AMM 24-00-00-910-802
Maintenance Tasks
Replacement of DC Circuit Breakers AMM 24-65-00-960-801
Operational Test of the Stall Protection System (SPS) AMM 27-32-00-710-801
Functional Test of the Stall Protection System AMM 27-32-00-720-801
Removal of the Stall Protection Computer AMM 27-32-01-000-801
Installation of the Stall Protection Computer AMM 27-32-01-400-801
Operational Test of the Ice Detection System AMM 30-81-00-710-801
Removal of the Ice Detector AMM 30-81-01-000-801
Installation of the Ice Detector AMM 30-81-01-400-801

Troubleshooting Recommendations:

  1. Reset Left Ice Detector circuit breaker CB1-E7. Is the fault message still present?

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

  2. Check for presence of 28 VDC / Ground Returns at the Left Ice Detector (A65) as per the following table:

    Measurement at Expected Results Results
    A65P1 - A 28 VDC
    A65P1 - G 28 VDC
    A65P1 - B Ground
    A65P1 - H Ground

    1. If check is satisfactory, continue with next step.
    2. If check is not satisfactory, repair the defective wire or replace the defective circuit breaker.

  3. Do wiring check between Stall Protection Computer (A178) and Left Ice Detector (A65) for the following wires:

    From To Results
    Conn. A178AP1 - 21 Conn. A65P1 - K

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

  4. Interchange the Left Ice Detector (A65) with the Right Ice Detector (A66). Is the fault message still present?

    1. If YES, continue with next step.
    2. If NO, replace the defective Ice Detector.

  5. Replace the Stall Protection Computer (A178).
  6. Do close out.

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