# SDR ASAA2018121327385

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2018
- Submitted: December 18, 2018
- Operation: Air carrier
- Aircraft: [N442AS](https://openairdocs.org/aircraft/N442AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43293
- Aircraft time: 20,215 hours, 6,692 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Sensor
- Condition: Failed
- Location: Sliding Window
- Stage of operation: CR
- 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/ASAA2018121327385

## Discrepancy

AT 36000 IN CRUISE L SIDE WINDOW OVERHEAT LIGHT ILLUMINATED RAN QRH AND LITE WENT OUT UNTIL APPROX 20,000 IN DES PER QRH TURNED OFF WINDOW HEAT SWITCH. GROUNDED - YES. PERFORMED B737-900 FIM 30-41 TASK 801 BITE TEST PASS. HISTORY SHOWED MULTIPLE SENSOR FAULTS. PERFORMED FIM 30-41 TASK 811 SWAPPED SENSOR POSITIONS FROM PRIMARY TO SPARE SENSOR ON L2 SIDE WINDOW OPS AND BITE CHECK PASS REF B737-900 AMM 30-41-00.

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