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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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04/09/21

Message Overview:

Message Name:

A/I CONTROL VALVE 4

Message Code:

B3-302165

Associated CAS:

R ENG ANTI-ICE FAIL
(Caution)

R ENG A/ICE FAIL ON
(Advisory)

Reporting LRU: R ENG AI VALVE
System Description: 30-21-00
Schematic Diagram: 75-10-00 Sh. 2
Wiring Diagram: 75-10-05

Message Description:

Right engine anti-ice control valve fault 4.

[MCID 1206]
Anti-Ice Control Valve 4.
A short to ground type fault in the harness between the engine anti-ice control valve and ECU A/B was sensed.

Possible Causes:

  • Circuit Breaker CB1 E-11
  • Anti-ice Solenoid
  • Wiring Harness (W1)
  • Wiring Harness (W6)
  • Wiring Harness (W3)
  • Aircraft Wiring Harness
  • Full Authority Digital Engine Control Unit (FADEC) Electronic Control Unit A (ECU) (A40)
  • Full Authority Digital Engine Control Unit (FADEC) Electronic Control Unit B (ECU) (A42)

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-36-0008 - "WING ANTI-ICE LEAK" EICAS Message During Climb

Forum Articles/Infoservice/Newsletter: None

  • Experience has shown that not turning the WAI OFF after a 'WING ANTI-ICE LEAK' CAS message could lead to an 'ENG THRUST FAULT' CAS message. Refer to the Advisory Wire listed above for more details.
  • When Batteries are 'ON' and engines are not running, if WAI is 'ON' while the rotary switch is on 'NORM', the L & R ENG THRUST FAULT CAS message will displayed.

Quick Links:

Component Location AMM 30-21-00-992-801
Operational Test of the Nacelle Anti-Ice System AMM 30-21-00-710-801
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
General Visual Inspection of the Engine Wiring Harness AMM 71-50-00-210-802
Removal of the FADEC Electrical Harness from the Right Engine AMM 71-50-05-000-803
Installation of the FADEC Electrical Harness on the Right Engine AMM 71-50-05-400-803
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
Electrical Connectors - Maintenance Practice - ALL SPM 20-20-00-02

Troubleshooting Recommendations:

  1. MCID 1206 task present, isolate per the Light Engine Maintenance Manual Subtask 72-00-00-810-201-A01.
  2. Check for the following MDC messages displayed with the fault:

    1. X-channel bus 1A (MCID 0905)
    2. X-channel bus 1B (MCID 0906)
    3. X-channel discrete 1A (MCID 0933)
    4. X-channel discrete 1B (MCID 0934)
      If any of the above MCID codes are posted, correct the cross channel faults first.

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