Message Name:

L WSHLD SENSOR/WIRING [SHORT]

Message Code:

3040010IN

Associated CAS:

L WSHLD HEAT FAIL
(Caution)

The Left Windshield Temperature Sensor has been detected Short Circuit (Sensor Resistance ≤ 165 ±10 ohms).

• Left Windshield Temperature Sensor
• Left Windshield (HR9)
• Left Windshield and Side Window Temperature Controller (WTC) (A164)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-30-0463 - No Fault Found (NFF) initiative - Windshield Temperature Controller (WTC)
• Windshield Troubleshooting Report to help with windshield temperature controller NFF

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

Flight Operation Notifications Manual (FONM): None

NOTES:

• There are three temperature sensors installed between the plies of each windshield and side window, one for control and monitoring and two spares.

1. Remove all connectors from the left WTC. Inspect connectors and pins for damage/defects.

   1. If no defects or damage is found, reconnect the WTC connectors and continue with next step.
   2. If defects or damage is found, repair/rectify as required.

2. Perform wiring checks between Left Windshield temperature sensor and L WTC.

   1. If wiring checks are not good, repair defective wiring as required and do close out.
   2. If wiring checks are good, continue with next step.

3. Measure the temperature sensor resistance (refer to Windshield and Side Window Temperature Sensor Resistance Chart).

   1. If resistance is within range, go to step 5.
   2. If resistance is out of range, continue with next step.

4. Connect spare temperature sensor on left windshield (HR9/ S2 or S3).

   1. If system checks are good, do close out.
   2. If fault remains, continue with next step.

5. Interchange L WTC.

   1. If system checks are good, replace faulty unit and do close out.
   2. If fault remains, continue with next step.

6. Replace Left Windshield.
7. Do close out.