# SDR ASAA2021121936964

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 19, 2021
- Submitted: December 23, 2021
- Operation: Air carrier
- Aircraft: [N583AS](https://openairdocs.org/aircraft/N583AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35681
- Aircraft time: 50,292 hours, 14,673 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CR
- How discovered: V
- Nature of condition: M
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021121936964

## Discrepancy

L SIDE WINDOW OVERHEAT IN FLIGHT RAN QRH, OVERHEAT LIGHT STAYED ILLUMINATED. SWITCH LEFT IN OFF POSITION FOR REST OF FLIGHT. GROUNDED - YES. FOUND L2 WHCU SENSOR FAULT. SWAPPED TO SPARE SENSOR OP CK GOOD REF B737-800 FIM 38-41 TASK 811.

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