WING ANTI-ICE FAULT
(Caution)

The amber 'WING ANTI-ICE FAULT' caution CAS message indicates one outboard wing leading edge sensor has failed.

• The IASC has detected a fault with one of the wing ANTI-ICE sensors. There are two sensors at each wings inboard and outboard positions. For the left wing the primary sensors are monitored by the #1 IASC, the right wing the #2 IASC monitors the primary sensors.
• Cross communication between the two IASCs would find a out of tolerance wing temperature sensor, or the sensor is shorted/opened.

• Outboard Right Wing Leading Edge Temperature Sensor
• Outboard Left Wing Leading Edge Temperature Sensor

Advisory Wire/Service Bulletin:

• AW300-72-0348 - AS907 Engine Diffuser Seal and Anti-Ice Valve

Forum Articles/Infoservice/Newsletter: None

1. Perform TASK 30-12-00-720-801 to verify the proper operation of the wing leading edge temperature sensors.

   1. If any of the sensors fail the above check, replace the sensor.

2. Entering the system diagnostics LRU tests for IASC 1B and 2B will allow viewing of the wing temperature sensors.

   1. Selecting the wing anti-ice sensor status will bring up the individual temperature sensors.

3. With wing heat on, the system will try and regulate the inner sensors to 54°C. The AMM has this checked at idle and power settings assuring that the left, right, and cross-flow ANTI-ICE valves operate correctly.

   1. The following parameters will be displayed on the sub system page:

      1. Left Inboard Leading Edge Temperature °C
      2. Left Outboard Leading Edge Temperature °C
      3. Right Inboard Leading Edge Temperature °C
      4. Right Outboard Leading Edge Temperature °C

4. Interrogate the MDC as follows:

   1. On the cursor control panel, ensure the toggle switch is to the right and select Anti-Ice, ECS and Fuel buttons simultaneously. The MDC main menu should now be displayed on Display Unit #3.
   2. Using the joystick, select Current Faults (if the fault is active) or Aircraft History to research stored faults. From Aircraft History you can then select Fault Message History and locate the fault. Going into advanced diagnostics will provide an equation id for the fault identified.
   3. Select the MDC fault or equation from the drop down below to provide additional information to assist in troubleshooting.
      Select an MDC Fault Code/Message:B3-007108 - CH A&B FAULT [L O/B TEMP SNSR]B3-007109 - CH A FAULT [L O/B TEMP SNSR]B3-007110 - CH B FAULT [L O/B TEMP SNSR]B3-007831 - CH A&B FAULT [R O/B TEMP SNSR]B3-007832 - CH A FAULT [R O/B TEMP SNSR]B3-007833 - CH B FAULT [R O/B TEMP SNSR]B3-527531 - LOW TEMP DISCRETE 1 FAIL [IASC1]B3-527545 - HI TEMP DISCRETE 1 FAIL [IASC1]B3-527580 - LOW TEMP DISCRETE 2 FAIL [IASC2]B3-527581 - HI TEMP DISCRETE 2 FAIL [IASC2]B3-006839 - NO SIGNAL/OUT OF RANGE [HI PRESS SNSR1]B3-006840 - NO SIGNAL/OUT OF RANGE [HI PRESS SNSR2]