# SDR ASAA2016021515456

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2016
- Submitted: February 17, 2016
- Operation: Air carrier
- Aircraft: [N409AS](https://openairdocs.org/aircraft/N409AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41733
- Aircraft time: 12,198 hours, 3,976 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Sensor
- Part number: 1019755
- Condition: Failed
- Location: Window Heat
- 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/ASAA2016021515456

## Discrepancy

WINDOW HEAT RT SIDE OVERHEAT LIGHT ILLUMINATED IN CRUISE.  RAN QRH.  LIGHT CAME ON AGAIN.  ACFT GROUNDED.  PERFORM WHCU BITE IAW FIM 30-41, TASK 801.  WHCU SHOWS SENSOR FAULT, SWAPPED SENSOR TO SPARE IAW FIM 30-41, TASK 811.  RE-ACCOMPLISHED BITE WITH NO FAULTS.  WINDOW HEAT, OPS NORMAL.

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