# SDR ASAA2018021023478

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2018
- Submitted: February 12, 2018
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 13,325 hours, 4,429 cycles
- System (JASC): [3040 · Windshield/Door Rain/Ice Removal](https://openairdocs.org/jasc/3040)
- Part: Warning Light
- Condition: Illuminated
- Location: Window Heat
- Part time: 13,338 hours, 4,426 cycles
- Stage of operation: TX
- 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/ASAA2018021023478

## Discrepancy

RIGHT NR 2 SLIDING WINDOW,  OVERHEAT LIGHT ILLUMINATED AT GATE. ACFT GROUNDED.  MULTIPLE SENSOR FAULTS ON WHCU BITE. RESISTANCE CHECKED THE SENSORS PRIMARY & SPARE NORMAL.  RESISTANCE OF WINDOW HEAT FILM NORMAL, VERIFIED CORRECT TAP FOR WINDOW CODE IAW AMM 30-41-21 & WDM 30-41-11.  AS A  PRECAUTION, REMOVED & REPLACED THE WHCU RT SIDE IAW AMM 30-41-11.  REPLACED THE COIL CORD ASSY, INSTALLATION TEST PASSED.

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