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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:

ANTI-ICE ON W/O COMMAND
(Service Message)

Message Code:

B3-302174

Associated CAS:

None

Reporting LRU: L ENG AI SYSTEM
System Description: 71-00-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Left engine anti-ice on without command.

[MCID 1213]
Anti-ice on without command.
Indication that the anti-ice system has been detected on with no command present.

Possible Causes:

  • Anti-ice Valve
  • Engine TT2 Sensor
  • Wiring Harness (W6)
  • Wiring Harness (W3)
  • Wiring Harness (W1)
  • Aircraft Wiring Harness

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

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
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 1213 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual TASK 72-00-00-810-203.

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