# SDR ASAA12511358

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2012
- Submitted: April 11, 2012
- Operation: Air carrier
- Aircraft: [N590AS](https://openairdocs.org/aircraft/N590AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35687
- Aircraft time: 16,011 hours, 5,052 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Control Unit
- Part number: 8300005604
- Part serial: 12044D
- Condition: Malfunctioned
- Location: Windshield Heat
- Part time: 16,013 hours, 5,053 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511358

## Discrepancy

R2 WINDOW HEAT "ON" LIGHT GOES ON & OFF WITH WINDOW BELOW OPERATING TEMP.  VERIFIED WINDOW HEAT FILM & SENSOR RESISTANCE GOOD PER 30-41-21.  REPLACED WINDSHIELD HEAT CONTROL UNIT PER 30-41-11.  SYS OPS CHECKED NORMAL.

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