# SDR ASAA2021100436167

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2021
- Submitted: October 19, 2021
- Operation: Air carrier
- Aircraft: [N464AS](https://openairdocs.org/aircraft/N464AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40714
- Aircraft time: 28,395 hours, 8,908 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: None
- Condition: None
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021100436167

## Discrepancy

THE L2 WINDOW OVERHEAT LIGHT IS ILLUMINATED. GROUNDED - YES. PERFORMED WHCU BITE AND FOUND SEVERAL WINDOW SENSOR FAULTS LOGGED. FURTHER TROUBLESHOOTING FAULT COULD NOT BE REPRODUCED. PERFORMEDB737-900 AMM TASK 30-41-11-710-801 (WHCU SYSTEM TEST) OPS CHECK PASSED.

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