# SDR ASAA2019070729966

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2019
- Submitted: July 23, 2019
- Operation: Air carrier
- Aircraft: [N472AS](https://openairdocs.org/aircraft/N472AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60580
- Aircraft time: 16,959 hours, 5,477 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Control Unit
- Part number: 8300005604
- Part serial: 23536E
- Condition: Failed
- Location: Window Heat
- Part time: 17,059 hours, 5,503 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019070729966

## Discrepancy

ON SHORT FINAL CAPTAINS LEFT WINDOW OVER HEAT WARNING LIGHT ILLUMINATED, (WE TURNED THE WINDOW HEAT SWITCH OFF AND LANDED). GROUNDED - YES. REMOVED & REPLACED WINDOW HEAT CONTROL UNIT REF AMM 30-41-11. OPS NORMAL.

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