# SDR ASAA2019101413103

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2019
- Submitted: October 14, 2019
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 23,636 hours, 7,684 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Warning Message
- Condition: False Activation
- Location: Window Heat
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019101413103

## Discrepancy

RH SIDE WINDOW OVERHEAT STAYS ILLUMINATED AFTER RUNNING CHECK LIST. GROUNDED - YES. RIGHT SIDE WHCU BITE VERIFY TEST GOOD. WHCU FAULT HIST LOGGED NUMEROUS WINDOW SENSOR FAULTS. DUE TO DEFECT HIST, AT R2 WINDOW, MOVED TERMINAL TO SPARE SENSOR PER B737-900 FIM TASK 30-41 TASK 811. RIGHT SIDE WINDOW HEAT OPS TESTED NORMAL. WHCU BITE TESTED GOOD.

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