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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

03/04/21

Message Overview:

Message Name:

ANTI-ICE COMMAND 1B

Message Code:

B3-302144

Associated CAS:

None

Reporting LRU: ANTI-ICE PANEL
System Description: 30-21-00
Schematic Diagram: 75-10-00
Wiring Diagram: 75-10-01
75-10-05

Message Description:

Left engine anti-ice command fault 1B. A fault between the flight deck engine anti-ice command and the ECU B was sensed.

Possible Causes:

  • Anti-Ice Harness
  • Anti-Ice Switch (SDS5)
  • W1 Wiring Harness
  • Left Full Authority Digital Engine Control (FADEC) Electronic Control Unit (ECU) B (A43)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Anti-Ice System - Component Location AMM 30-11-00-992-801
Removal of the Anti-Ice Control Panel AMM 30-11-09-000-801
Installation of the Anti-Ice Control Panel AMM 30-11-09-400-801
Operational Test of the Nacelle Anti-Ice System AMM 30-21-00-710-801
Leak Test of the Nacelle Anti-Ice System AMM 30-21-00-790-801
Engine Nacelle Anti-Ice - Component Location AMM 30-21-00-992-801
Removal of the Cowl Anti-Ice Valve AMM 30-21-01-000-801
Installation of the Cowl Anti-Ice Valve AMM 30-21-01-400-801
Removal of the Anti-Ice Dual Pressure Switch AMM 30-21-03-000-801
Installation of the Anti-Ice Dual Pressure Switch AMM 30-21-03-400-801
Removal of the Anti-Ice Tubes AMM 30-21-05-000-801
Installation of the Anti-Ice Tubes AMM 30-21-05-400-801
Removal of the Engine Electronic Control Unit (ECU) AMM 76-10-05-000-801
Installation of the Engine Electronic Control Unit (ECU) AMM 76-10-05-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Perform the power-up check, did the fault clear?

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

  2. Ensure CB1-E11 is closed.
  3. Perform a voltage check per the following table:

    PL19 SDS5 From: To: Expected Results: Results:
    OPEN PL19P1 pin K (A43J2 pin 44 Nacelle A/I Selected) GND 28 VDC
    CLOSED PL19P1 pin K (A43J2 pin 44 Nacelle A/I Selected) GND 0 VDC

    1. Do you have the proper voltages?

      1. If YES, go to Step 13.
      2. If NO, continue with next step.

  4. Remove the electrical power from the aircraft.
  5. Open and tag the applicable circuit breakers.
  6. Disconnect and examine the L ECU B (A43) Connector W2P2 for damaged wires and other damage. Refer to the AMM.
  7. Perform a continuity check per the following table:

    From: To: PL19 SDS5 Results:
    GS2122 W2P2 pin 44 (L FADEC B (A43) Nacelle A/I Selected) OPEN ∞
    GS2122 W2P2 pin 44 (L FADEC B (A43) Nacelle A/I Selected) CLOSED ≈ 0Ω

    1. Do you have the correct continuity?

      1. If YES, go to Step 13.
      2. If NO, continue with next step.

  8. Perform a continuity check per the following table:

    From: To: Expected Results: Results:
    PL19J1 pin K SDS5P1 pin 3NO 0Ω
    PL19J1 pin E SDS5P1 pin 3C 0Ω

    1. Do you have the correct continuity?

      1. If YES, go to Step 13.
      2. If NO, continue with next step.

  9. Perform a continuity check per the following table:

    From: To: PL19 SDS5 Expected Results: Results:
    GS2122 PL19P1 pin E ≈ 0Ω
    GS2122 PL19J1 pin K CLOSED ≈ 0Ω
    GS2122 PL19J1 pin K OPEN ∞

  10. Do you have the correct continuity?

    1. If YES, go to Step 13.
    2. If NO, replace SDS5 or PL19.

      1. Continue with next step.

  11. Perform a continuity check per the following table:

    From: To: Expected Results: Results:
    W2P2 pin 44 (Nacelle A/I Selected) W2P2 Back Shell (GND) ≈ 0Ω

    1. Do you have the correct continuity?

      1. If YES, go to Step 13.
      2. If NO, continue with next step.

  12. Repair W2 wiring harness.
  13. Remove the tags, put the circuit breakers in the ON position, and perform a system check.
  14. Perform the power-up check, did the fault clear?

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

  15. Open and tag the applicable circuit breakers.
  16. Replace the L ECU B (A43) per AMM 76-10-05-000-801.
  17. Remove the tags, put the circuit breakers in the ON position, and perform a system check.
  18. Do the power-up check, did the fault clear?

    1. If YES, do close out.
    2. If NO, contact CRC for additional support.

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