# SDR ASAA2020113033618

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2020
- Submitted: December 3, 2020
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 23,620 hours, 7,541 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Sensor
- Part number: 56100025
- Part serial: 13283H2314
- Condition: Faulted
- Location: Sliding Window
- Part time: 25,023 hours, 7,996 cycles
- Stage of operation: NR
- 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/ASAA2020113033618

## Discrepancy

LEFT SIDE WINDOW HEAT OVERHEAT LIGHT REMAINS ON.  GROUNDED-YES.  CONFIRMED LT SIDE WINDOW OVERHEAT LIGHT ILLUMINATES AND REMAINS ON.  PERFORMED WHCU BITE AND FOUND LT SIDE WINDOW SENSOR FAULT, REF B737-900 FIM 30-41 TASK 801.  PERFORMED FIM 30-41 TASK 811, BOTH PRIMARY AND SECONDARY SENSOR RESISTANCE OUT OF LIMITS.  REMOVED AND REPLACED LT NR 2 OPENABLE WINDOW, REF B737-900 AMM 56-12-11-400-801.  ACCOMPLISHED WINDOW ADJUSTMENT, REF AMM 56-12-11-820-801, WITHIN LIMITS.  OPERATIONS CHECK NORMAL.  ACCOMPLISHED WINDOW HEAT SYSTEM OPERATIONAL TEST, REF AMM 30-41-00-710-801.

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